Learn Advanced C# Code

C# Encryption and Decryption by Rijndael Method

2015-08-15T06:09:00.004+05:30

Another flawlessly written program to up your C# skills! The code is written and tested in Visual Studio 2012. Features of this project are:

Encrypt and Decrypt any type of file/s in your computer system.
Easy to use interface. Few clicks required only.
Choose passkey also known as a password. May consist of letters and numbers[Maximum 8].
Keep original files intact. You may change code to delete original files but we did not implement this currently.
A class with functions to encrypt and decrypt files is created. This file may be reused.
The Rijndael algorithm of Encryption and Decryption is used internally to Cipher & Decipher.

C# Encryption Decryption

public partial class MainForm : Form

{

public MainForm()

{

InitializeComponent();

}

string encfileextention;

bool encflagOpen;

bool encflagSave;

ENC_DEC ed = new ENC_DEC();

string decfileextention;

bool decflagOpen;

bool decflagSave;

private void rdoEncryption_CheckedChanged(object sender, EventArgs e)

{

if (rdoEncryption.Checked == true)

{

gbEncryption.Visible = true;

gbDecryption.Visible = false;

}

else

{

gbEncryption.Visible = false;

gbDecryption.Visible = true;

}

private void rdoDecryption_CheckedChanged(object sender, EventArgs e)

{

//Same as for the above radio button

}

private void MainForm_Load(object sender, EventArgs e)

{

MessageBox.Show("Welcome!");

}

private void btnEncOpen_Click(object sender, EventArgs e)

{

OpenFileDialog dlg = new OpenFileDialog();

dlg.Filter = "All files (*.*)|*.*";

if (dlg.ShowDialog() == DialogResult.OK)

{

String s = dlg.FileName;

txtEncInput.Text = s;

FileInfo myfile = new FileInfo(s);

if ((myfile.Length / 1024000) == 0)

{

lblEncSize.Text = "SIZE : " + Convert.ToString(myfile.Length / 1024) + " Kb";

}

else

{

lblEncSize.Text = "SIZE : " + Convert.ToString(myfile.Length / 1024000) + " Mb";

}

encfileextention = myfile.Extension;

encflagOpen = true;

if ((encflagSave == true) && (encflagOpen == true))

{

btnEncrypt.Enabled = true;

encflagOpen = false;

encflagSave = false;

}

private void btnEncSave_Click(object sender, EventArgs e)

{

SaveFileDialog dlg = new SaveFileDialog();

dlg.Filter = "All files (*.*)|*.*";

if (dlg.ShowDialog() == DialogResult.OK)

{

string s = dlg.FileName;

txtEncOutput.Text = s;

String m = dlg.FileName;

FileInfo myfile = new FileInfo(m);

if (myfile.Extension == null)

txtEncOutput.Text = m;

else

txtEncOutput.Text = m + encfileextention;

encflagSave = true;

}

if ((encflagSave == true) && (encflagOpen == true))

{

btnEncrypt.Enabled = true;

encflagOpen = false;

encflagSave = false;

}

private void btnDecOpen_Click(object sender, EventArgs e)

{

OpenFileDialog dlg = new OpenFileDialog();

dlg.CheckFileExists = true;

dlg.Filter = "All files (*.*)|*.*";

if (dlg.ShowDialog() == DialogResult.OK)

{

String s = dlg.FileName;

txtDecInput.Text = s;

FileInfo myfile = new FileInfo(s);

if ((myfile.Length / 1024000) == 0)

{

lblDecSize.Text = "SIZE : " + Convert.ToString(myfile.Length / 1024) + " Kb";

}

else

{

lblDecSize.Text = "SIZE : " + Convert.ToString(myfile.Length / 1024000) + " Mb";

}

decfileextention = myfile.Extension;

decflagOpen = true;

}

else

MessageBox.Show("You did not select any file");

if ((decflagSave == true) && (decflagOpen == true))

{

btnDecrypt.Enabled = true;

decflagOpen = false;

decflagSave = false;

}

private void btnDecSave_Click(object sender, EventArgs e)

{

SaveFileDialog dlg = new SaveFileDialog();

dlg.Filter = "All files (*.*)|*.*";

if (dlg.ShowDialog() == DialogResult.OK)

{

string m = dlg.FileName;

txtDecOutput.Text = m;

FileInfo myfile = new FileInfo(m);

if (myfile.Extension == null)

txtDecOutput.Text = m;

else

txtDecOutput.Text = m + decfileextention;

}

else

MessageBox.Show("You have not selected any file");

decflagSave = true;

if ((decflagSave == true) && (decflagOpen == true))

{

btnDecrypt.Enabled = true;

decflagOpen = false;

decflagSave = false;

}

private void btnEncrypt_Click(object sender, EventArgs e)

{

this.Text = "Please wait";

ed.EncFile(txtEncInput.Text, txtEncOutput.Text, textBox1.Text + "qlku");

MessageBox.Show("New File Location : '" + txtEncOutput.Text + "'", encfileextention + " file converted successfully");

this.Text = "Password protect your files here !";

}

private void btnDecrypt_Click(object sender, EventArgs e)

{

this.Text = "Please wait";

ed.DecFile(txtDecInput.Text, txtDecOutput.Text, textBox2.Text + "qlku");

MessageBox.Show("New File Location : '" + txtDecOutput.Text + "'", decfileextention + " file converted successfully");

this.Text = "Password protect your files here !";

}

class ENC_DEC

{

public void DecFile(string inputFile, string outputFile, string Pass)

{

try

{

string password = Pass; // Your Key Here

UnicodeEncoding UE = new UnicodeEncoding();

byte[] key = UE.GetBytes(password);

FileStream fsCrypt = new FileStream(inputFile, FileMode.Open);

RijndaelManaged RMCrypto = new RijndaelManaged();

CryptoStream cs = new CryptoStream(fsCrypt, RMCrypto.CreateDecryptor(key, key), CryptoStreamMode.Read);

FileStream fsOut = new FileStream(outputFile, FileMode.Create);

int data;

while ((data = cs.ReadByte()) != -1)

{

fsOut.WriteByte((byte)data);

}

fsOut.Close();

cs.Close();

fsCrypt.Close();

}

catch

{

MessageBox.Show("You have entered wrong password");

}

public void EncFile(string inputFile, string outputFile, string Mypassword)

{

try

{

string password = @Mypassword; // Your Key Here

UnicodeEncoding UE = new UnicodeEncoding();

byte[] key = UE.GetBytes(password);

string cryptFile = outputFile;

FileStream fsCrypt = new FileStream(cryptFile, FileMode.Create);

RijndaelManaged RMCrypto = new RijndaelManaged();

CryptoStream cs = new CryptoStream(fsCrypt, RMCrypto.CreateEncryptor(key, key), CryptoStreamMode.Write);

FileStream fsIn = new FileStream(inputFile, FileMode.Open);

int data;

while ((data = fsIn.ReadByte()) != -1)

{

cs.WriteByte((byte)data);

}

fsIn.Close();

cs.Close();

fsCrypt.Close();

}

catch

{

MessageBox.Show("Encryption failed!", "Error");

}

Direct Download Perfectly Running .Net C# 5 Code
Direct Download Working EXE

Please Note:
** Do not Copy & Paste code written here ; instead type it in your Development Environment
** Testing done in .Net Framework 4.5 but code should be very similar for previous versions of .Net Framework
** All Program Codes written here are 100% tested & running.

C# 3 X 3 TicTacToe Tutorial

2014-06-15T01:35:00.000+05:30

You can find the code to the popular game TicTacToe in C# language using the .Net Framework 4.5. The highlights include the following:

Perfectly Written Flawless Code in .Net Framework C# 5 language using WinForms.
Programmer level only Beginner required. NOT Intermediate. NOT Expert.
The code is explained immediately before being written.
The game's basic functionality is that it has two players put their letters, the X and O in 9 available grid boxes one by one and the player to make a straight line with 3 letters wins.
The Game Counts scores of the individual players and a Reset of the scores is also possible.
Players may reset the current game and start a new game whenever needed.
Please recommend and comment if it worked for you. Thank You for Visiting :)

using System;

using System.Text;

using System.Windows.Forms;

namespace TicTacToe

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

The integer variable pturn remembers which player plays next. The value 1 means that player 1 plays next. Similarly, the value 2 means that player 2 plays next. This variable will have one of these two values.

int pturn;

The variable current_started remembers which player has played the latest/currently ongoing game. So that when the game ends, it is the opposite player to take the first turn. This makes sure the players get equal number of chances to start first. "First Turns" can easily decide a winner in this particular game, therefore tracking it is absolutely necessary.

int current_started;

The X's and O's are stored in a 2D array. You may think that the values are stored in the Text value of each button. But storing them in this way makes it super easy to retrieve and check values. This 2D array will be used later to check the straight line win for a player.

public int[,] gridvalues = new int[3, 3];

private void Form1_Load(object sender, EventArgs e)

{

Set the Player 1 to play first when the form loads i.e. when the game starts up.

pturn = 1;

}

The Function below helps to start a new game. It enables all the buttons to be pressed again and sets their Text values to blank meaning they are available to use.

private void start_new_game()

{

b11.Enabled = true; b11.Text = "";

b12.Enabled = true; b12.Text = "";

b13.Enabled = true; b13.Text = "";

b21.Enabled = true; b21.Text = "";

b22.Enabled = true; b22.Text = "";

b23.Enabled = true; b23.Text = "";

b31.Enabled = true; b31.Text = "";

b32.Enabled = true; b32.Text = "";

b33.Enabled = true; b33.Text = "";

This below for loop sets the 2D Array Values to 0. Grid values with 0 mean they are not clicked, unused, and available(waiting) for use by any player.

for (int i = 0; i < 3; i++)

{

for (int j = 0; j < 3; j++)

{

gridvalues[i, j] = 0;

}

The code below checks for the player who started the current game and makes sure the mext game is started by the next player.

if (current_started == 1)

{

current_started = 2;

pturn = 2;

}

else

if(current_started == 2)

{

current_started = 1;

pturn = 1;

}

There are two diagonals in this square grid. The function below checks the two diagonals for a potential Win from any player. The two variables countforP1 and countforP2 counts the number of (particular) player visits in each diagonal. The two for loops allow us to check each cell in the 2D Grid Array.

The "i == j" checks for cells with equal values of row and column. The diagonals have row and column values same i.e (1,1), (2,2) and (3,3).

When the first player visits a grid cell, the value of the 2D Array grid cell is set to 1. When the second player visits a grid cell, the value of the 2D Array grid cell is set to 2.

private void check_all_diagonals()

{

int countforP1 = 0;

int countforP2 = 0;

for (int i = 0; i < 3; i++)

{

for (int j = 0; j < 3; j++)

{

if (i == j && gridvalues[j, i] == 1)

{

countforP1++;

}

if (i == j && gridvalues[j, i] == 2)

{

countforP2++;

}

if (countforP1 == 3)

{

MessageBox.Show("Player 1 Wins !!");

p1score.Text = Convert.ToString(Convert.ToUInt16(p1score.Text) + 1);

start_new_game();

break;

}

if (countforP2 == 3)

{

MessageBox.Show("Player 2 Wins !!");

p2score.Text = Convert.ToString(Convert.ToUInt16(p2score.Text) + 1);

start_new_game();

break;

}

private void check_all_rows()

{

int countforP1 = 0;

int countforP2 = 0;

for (int i = 0; i < 3; i++)

{

countforP1 = 0;

countforP2 = 0;

for (int j = 0; j < 3; j++)

{

if (gridvalues[i, j] == 1)

{

countforP1++;

}

if (gridvalues[i, j] == 2)

{

countforP2++;

}

if (countforP1 == 3)

{

MessageBox.Show("Player 1 Wins !!");

p1score.Text = Convert.ToString(Convert.ToUInt16(p1score.Text)+1);

start_new_game();

break;

}

if (countforP2 == 3)

{

MessageBox.Show("Player 2 Wins !!");

p2score.Text = Convert.ToString(Convert.ToUInt16(p2score.Text) + 1);

start_new_game();

break;

}

This function checks column-wise the potential win for a player. The first for loop checks for the column number.

private void check_all_columns()

{

int countforP1 = 0;

int countforP2 = 0;

for (int i = 0; i < 3; i++)

{

The values below reset the visit count for each column.

countforP1 = 0;

countforP2 = 0;

For each column number we check all row values using the j variable.

for (int j = 0; j < 3; j++)

{

if (gridvalues[j, i] == 1)

{

countforP1++;

}

if (gridvalues[j, i] == 2)

{

countforP2++;

}

if (countforP1 == 3)

{

MessageBox.Show("Player 1 Wins !!");

p1score.Text = Convert.ToString(Convert.ToUInt16(p1score.Text) + 1);

start_new_game();

break;

}

if (countforP2 == 3)

{

MessageBox.Show("Player 2 Wins !!");

p2score.Text = Convert.ToString(Convert.ToUInt16(p2score.Text) + 1);

start_new_game();

break;

}

When the button is clicked, the button is first disabled to register the visit. Then, we check if it is the first or second player to visit. The 2D Array is set then the Text on the button is set appropriately. After each visit, the rows, columns and diagonals are checked for a potential win. After a win, a new game starts automatically.

private void b11_Click(object sender, EventArgs e)

{

b11.Enabled = false;

if (pturn == 1)

{

gridvalues[0, 0] = 1;

b11.Text = "X";

pturn = 2;

}

else

{

gridvalues[0, 0] = 2;

b11.Text = "O";

pturn = 1;

}

check_all_rows(); check_all_columns(); check_all_diagonals();

}

private void b12_Click(object sender, EventArgs e)

{

b12.Enabled = false;

if (pturn == 1)

{

gridvalues[0, 1] = 1;

b12.Text = "X";

pturn = 2;

}

else

{

gridvalues[0, 1] = 2;

b12.Text = "O";

pturn = 1;

}

check_all_rows(); check_all_columns(); check_all_diagonals();

}

private void b13_Click(object sender, EventArgs e)

{

b13.Enabled = false;

if (pturn == 1)

{

gridvalues[0, 2] = 1;

b13.Text = "X";

pturn = 2;

}

else

{

gridvalues[0, 2] = 2;

b13.Text = "O";

pturn = 1;

}

check_all_rows(); check_all_columns(); check_all_diagonals();

}

private void b21_Click(object sender, EventArgs e)

{

b21.Enabled = false;

if (pturn == 1)

{

gridvalues[1, 0] = 1;

b21.Text = "X";

pturn = 2;

}

else

{

gridvalues[1, 0] = 2;

b21.Text = "O";

pturn = 1;

}

check_all_rows(); check_all_columns(); check_all_diagonals();

}

private void b22_Click(object sender, EventArgs e)

{

b22.Enabled = false;

if (pturn == 1)

{

gridvalues[1, 1] = 1;

b22.Text = "X";

pturn = 2;

}

else

{

gridvalues[1, 1] = 2;

b22.Text = "O";

pturn = 1;

}

check_all_rows(); check_all_columns(); check_all_diagonals();

}

private void b23_Click(object sender, EventArgs e)

{

b23.Enabled = false;

if (pturn == 1)

{

gridvalues[1, 2] = 1;

b23.Text = "X";

pturn = 2;

}

else

{

gridvalues[1, 2] = 2;

b23.Text = "O";

pturn = 1;

}

check_all_rows(); check_all_columns(); check_all_diagonals();

}

private void b31_Click(object sender, EventArgs e)

{

b31.Enabled = false;

if (pturn == 1)

{

gridvalues[2, 0] = 1;

b31.Text = "X";

pturn = 2;

}

else

{

gridvalues[2, 0] = 2;

b31.Text = "O";

pturn = 1;

}

check_all_rows(); check_all_columns(); check_all_diagonals();

}

private void b32_Click(object sender, EventArgs e)

{

b32.Enabled = false;

if (pturn == 1)

{

gridvalues[2, 1] = 1;

b32.Text = "X";

pturn = 2;

}

else

{

gridvalues[2, 1] = 2;

b32.Text = "O";

pturn = 1;

}

check_all_rows(); check_all_columns(); check_all_diagonals();

}

private void b33_Click(object sender, EventArgs e)

{

b33.Enabled = false;

if (pturn == 1)

{

gridvalues[2, 2] = 1;

b33.Text = "X";

pturn = 2;

}

else

{

gridvalues[2, 2] = 2;

b33.Text = "O";

pturn = 1;

}

check_all_rows(); check_all_columns(); check_all_diagonals();

}

private void btnReset_Click(object sender, EventArgs e)

{

p1score.Text = "0";

p2score.Text = "0";

}

private void bnewgame_Click(object sender, EventArgs e)

{

start_new_game();

}

private void bexit_Click(object sender, EventArgs e)

{

this.Close();

}

private void Form1_FormClosed(object sender, FormClosedEventArgs e)

{

MessageBox.Show("Please Visit http://www.Code-Kings.blogspot.com//" ,"Have a Nice Day");

}

Direct Download Perfectly Running .Net C# 5.0 Code

Cubic Equation Roots in C# Code

2013-11-23T23:14:00.001+05:30

The program below perfectly solves the Cubic Equation of the form Ax^3 + Bx^2 + Cx + D.

The flawless code is written in .Net C#.

The real and imaginary roots are separated by black and red colors respectively.

Simply update the value of variables A, B, C and D to see the answers i.e. the solution of the equation.

To find the 2 roots, solution of a Quadratic equation please visit here.

This code is written by Code-Kings exclusively for YOU! Please like us wherever possible and show some love in return!

namespace WindowsFormsApplication1

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void CubicCalculations()

{

try

{

double a = double.Parse(TCubA.Text);

double b = double.Parse(TCubB.Text);

double c = double.Parse(TCubC.Text);

double d = double.Parse(TCubD.Text);

double f = (((3 * c) / a) - ((b * b) / (a * a))) / 3;

string f2 = f.ToString();

double g = (((2 * (Math.Pow(b, 3))) / (Math.Pow(a, 3))) - ((9 * b * c) / (Math.Pow(a, 2))) + ((27 * d) / a)) / 27;

string g2 = g.ToString();

double h = ((Math.Pow(g, 2)) / 4) + ((Math.Pow(f, 3)) / 27);

string h2 = h.ToString();

if (h <= 0)

{

double i = (((Math.Pow(g, 2)) / 4) - h);

double i2 = Math.Pow(i, 0.5);

string i3 = i2.ToString();

double j = (Math.Pow(i2, 0.333333333333333333333333));

string j2 = j.ToString();

double k = ((Math.Acos(0 - (g / (2 * i2)))));

string k2 = k.ToString();

double l = (j * (0 - 1));

string l2 = l.ToString();

double m = ((Math.Cos(k / 3)));

string m2 = m.ToString();

double n = ((Math.Pow(3, 0.5)) * Math.Sin(k / 3));

string n2 = n.ToString();

double p = ((b / (3 * a)) * (0 - 1));

string p2 = p.ToString();

double x = ((2 * j) * (Math.Cos(k / 3)) - (b / (3 * a)));

string x2 = x.ToString();

TCubFR.Text = x2;

double y = (l * (m + n) + p);

string y2 = y.ToString();

TCubSR.Text = y2;

double z = (l * (m - n) + p);

string z2 = z.ToString();

TCubTR.Text = z2;

}

if (h > 0)

{

double u = 0 - g;

double r = (u / 2) + (Math.Pow(h, 0.5));

string r2 = r.ToString();

if (r >= 0)

{

double s6 = (Math.Pow(r, 0.333333333333333333333333333));

double s8 = s6;

string s9 = s8.ToString();

double t8 = (u / 2) - (Math.Pow(h, 0.5));

string t9 = t8.ToString();

double help8 = (1.0 / 3);

string help9 = help8.ToString();

if (t8 < 0)

{

double v7 = (Math.Pow((0 - t8), 0.33333333333333333333));

double v8 = (v7);

string v9 = v8.ToString();

double x3 = (s8 - v8) - (b / (3 * a));

string x4 = x3.ToString();

TCubFR.Text = x4;

double y3 = ((0 - (s8 - v8)) / 2) - (b / (3 * a));

double y4 = ((s8 + v8) * (Math.Sqrt(3) / 2));

string y6 = y3.ToString();

string y7 = y4.ToString();

TCubSR.Text = y6 + " + " + y7 + "i";

double z3 = ((0 - (s8 - v8)) / 2) - (b / (3 * a));

double z4 = ((s8 + v8) * (Math.Sqrt(3)) / 2);

string z6 = z3.ToString();

string z7 = z4.ToString();

TCubTR.Text = z6 + " - " + z7 + "i";

}

if (t8 >= 0)

{

double v6 = (Math.Pow((0 - (0 - t8)), 0.33333333333333333333));

double v5 = (v6);

string v4 = v5.ToString();

double x3 = (s8 + v5) - (b / (3 * a));

string x4 = x3.ToString();

TCubFR.Text = x4;

double y3 = ((0 - (s8 + v5)) / 2) - (b / (3 * a));

double y4 = ((s8 - v5) * (Math.Sqrt(3) / 2));

string y6 = y3.ToString();

string y7 = y4.ToString();

TCubSR.Text = y6 + " + " + y7 + "i";

double z3 = ((0 - (s8 + v5)) / 2) - (b / (3 * a));

double z4 = ((s8 - v5) * (Math.Sqrt(3)) / 2);

string z6 = z3.ToString();

string z7 = z4.ToString();

TCubTR.Text = z6 + " - " + z7 + "i";

}

if (r < 0)

{

double s3 = (Math.Pow((0 - r), 0.333333333333333333333333333));

double s = (0 - s3);

string s2 = s.ToString();

double t = (u / 2) - (Math.Pow(h, 0.5));

string t2 = t.ToString();

double help = (1.0 / 3);

string help2 = help.ToString();

if (t < 0)

{

double v = (Math.Pow((0 - t), 0.33333333333333333333));

double v2 = (v);

string v3 = v2.ToString();

double x3 = (s - v2) - (b / (3 * a));

string x4 = x3.ToString();

TCubFR.Text = x4;

double y3 = ((0 - (s - v2)) / 2) - (b / (3 * a));

double y4 = ((s + v2) * (Math.Sqrt(3) / 2));

string y6 = y3.ToString();

string y7 = y4.ToString();

TCubSR.Text = y6 + " + " + y7 + "i";

double z3 = ((0 - (s - v2)) / 2) - (b / (3 * a));

double z4 = ((s + v2) * (Math.Sqrt(3)) / 2);

string z6 = z3.ToString();

string z7 = z4.ToString();

TCubTR.Text = z6 + " - " + z7 + "i";

}

if (t >= 0)

{

double v = (Math.Pow((0 - (0 - t)), 0.33333333333333333333));

double v2 = (v);

string v3 = v2.ToString();

double x3 = (s + v2) - (b / (3 * a));

string x4 = x3.ToString();

TCubFR.Text = x4;

double y3 = ((0 - (s + v2)) / 2) - (b / (3 * a));

double y4 = ((s - v2) * (Math.Sqrt(3) / 2));

string y6 = y3.ToString();

string y7 = y4.ToString();

TCubSR.Text = y6 + " + " + y7 + "i";

double z3 = ((0 - (s + v2)) / 2) - (b / (3 * a));

double z4 = ((s - v2) * (Math.Sqrt(3)) / 2);

string z6 = z3.ToString();

string z7 = z4.ToString();

TCubTR.Text = z6 + " - " + z7 + "i";

}

if (h == 0 && f == 0 && g == 0)

{

double x5 = ((Math.Pow((d / a), 0.3333333333333333333))) * (0 - 1);

string x6 = x5.ToString();

TCubFR.Text = x6;

TCubSR.Text = x6;

TCubTR.Text = x6;

}

catch { }

}

private void TCubA_TextChanged(object sender, EventArgs e)

{

CubicCalculations();

}

private void TCubB_TextChanged(object sender, EventArgs e)

{

CubicCalculations();

}

private void TCubC_TextChanged(object sender, EventArgs e)

{

CubicCalculations();

}

private void TCubD_TextChanged(object sender, EventArgs e)

{

CubicCalculations();

}

private void TCubFR_TextChanged(object sender, EventArgs e)

{

if (TCubFR.Text.Contains("i"))

{

TCubFR.ForeColor = Color.Red;

}

else

{

TCubFR.ForeColor = Color.Black;

}

private void TCubSR_TextChanged(object sender, EventArgs e)

{

if (TCubSR.Text.Contains("i"))

{

TCubSR.ForeColor = Color.Red;

}

else

{

TCubSR.ForeColor = Color.Black;

}

private void TCubTR_TextChanged(object sender, EventArgs e)

{

if (TCubTR.Text.Contains("i"))

{

TCubTR.ForeColor = Color.Red;

}

else

{

TCubTR.ForeColor = Color.Black;

}

Direct Download Perfectly Running .Net C# 5.0 Code (71.83 KB)

Download File from Internet Synchronously and Asynchronously

2013-08-03T17:20:00.002+05:30

This program will let you download a file both ways i.e. Synchronously and Asynchronously. Just feed the file URL into the first text-box and the save file location into the second text-box Then simply choose from the two options to download the file from the internet.

There is also a progress indicator that shows the download progress. See code below:

using System;

using System.Text;

using System.Windows.Forms;

using System.Net;

namespace Download_File_from_Internet

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void btnPaste_Click(object sender, EventArgs e)

{

txtPaste.Text = Clipboard.GetText();

}

private void btnLocation_Click(object sender, EventArgs e)

{

saveFileDialog.ShowDialog();

if (saveFileDialog.FileName != "")

{

txtLocation.Text = saveFileDialog.FileName;

}

private void btnSyncDwnld_Click(object sender, EventArgs e)

{

WebClient webClient = new WebClient();

webClient.DownloadFile(txtPaste.Text, txtLocation.Text);

//webClient.Dispose();

}

private void btnAsyncDwnld_Click(object sender, EventArgs e)

{

WebClient webClient = new WebClient();

webClient.DownloadFileCompleted += Download_Completed;

webClient.DownloadProgressChanged += Download_ProgressChanged;

webClient.DownloadFileAsync(new Uri(txtPaste.Text), txtLocation.Text);

//webClient.Dispose();

}

private void Download_ProgressChanged(object sender, DownloadProgressChangedEventArgs e)

{

progressBar.Value = e.ProgressPercentage;

}

private void Download_Completed(object sender, AsyncCompletedEventArgs e)

{

MessageBox.Show("Download completed!");

}

Direct Download Perfectly Running .Net C# 5.0 Code (142 KB)

Measure Difference between 2 Dates

2013-06-27T22:54:00.000+05:30

Getting differences between two given dates is as easy as it can get. The function used here is the End_Date.Subtract(Start_Date). This gives us a time span that has the time interval between the two dates. The time span can return values in the form of days, years, etc.

You can then simply display the values as Text Strings. See code below for details on how to display the results in WinForms. After this, you can see the same program in the Console Environment.

namespace Date_Difference_in_CSharp

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void dddtpStart_ValueChanged(object sender, EventArgs e)

{

try

{

DateTime startDate = (DateTime)dddtpStart.Value;

DateTime endDate = (DateTime)dddtpEnd.Value;

TimeSpan ts = endDate.Subtract(startDate);

ddtxtDays.Text = ts.Days.ToString();

ddtxtDifference.Text = (Convert.ToDouble(ddtxtDays.Text) / 365).ToString();

}

catch

{

}

private void dddtpEnd_ValueChanged(object sender, EventArgs e)

{

try

{

DateTime startDate = (DateTime)dddtpStart.Value;

DateTime endDate = (DateTime)dddtpEnd.Value;

TimeSpan ts = endDate.Subtract(startDate);

ddtxtDays.Text = ts.Days.ToString();

ddtxtDifference.Text = (Convert.ToDouble(ddtxtDays.Text) / 365).ToString();

}

catch

{

}

Below, you can see a program written in the C# Console environment that does the same work:

using System;

using System.Text;

namespace Print_and_Get_Date_Difference_in_C_Sharp

{

class Program

{

static void Main(string[] args)

{

Console.WriteLine("*******************************************");

Console.WriteLine("********www.code-kings.blogspot.com********");

Console.WriteLine("*******************************************\n");

Console.WriteLine("The Date Today Is:");

DateTime DT = new DateTime();

DT = DateTime.Today.Date;

Console.WriteLine(DT.Date.ToString());

Console.WriteLine("Calculate the difference between two dates:\n");

int year, month, day;

Console.WriteLine("Enter Start Date");

Console.WriteLine("Enter Year");

year = Convert.ToInt16(Console.ReadLine().ToString());

Console.WriteLine("Enter Month");

month = Convert.ToInt16(Console.ReadLine().ToString());

Console.WriteLine("Enter Day");

day = Convert.ToInt16(Console.ReadLine().ToString());

DateTime DT_Start = new DateTime(year,month,day);

Console.WriteLine("\nEnter End Date");

Console.WriteLine("Enter Year");

year = Convert.ToInt16(Console.ReadLine().ToString());

Console.WriteLine("Enter Month");

month = Convert.ToInt16(Console.ReadLine().ToString());

Console.WriteLine("Enter Day");

day = Convert.ToInt16(Console.ReadLine().ToString());

DateTime DT_End = new DateTime(year, month, day);

TimeSpan timespan = DT_End.Subtract(DT_Start);

Console.WriteLine("\nThe Difference is:\n");

Console.WriteLine(timespan.TotalDays.ToString() + " Days\n");

Console.WriteLine((timespan.TotalDays / 365).ToString() + " Years");

Console.ReadKey();

}

Solve Quadratic Equation Code and Tutorial in C#

2013-06-08T14:33:00.002+05:30

You can very easily solve a Quadratic Equation with this small program. Just enter the values in the 3 text boxes and you will find the resulting roots(solutions) of the Quadratic equation on the right. Watch the final output and see the source code further below:

Solve Quadratic Equation in C# WinForms Application

The C# Code below is simple, structured & complete. Note the code for the text box change event is similar for all the 3 text boxes.

namespace Solve_Quadratic_Equation

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

double a, b, c;

Code to be used if the Determinant of Quadratic Equation is positive; This code returns the value to be used when the square root of the determinant is a real number.

public double DeterminantQuad(double b, double a, double c)

{

return ((b * b) - (4 * a * c));

}

Code to be used if Determinant of Quadratic Equation is negative; The code below returns the negative value of the regular determinant. Since the regular determinant is negative, we get a positive value in the end(negative of negative is positive). We then add the letter "i" in the answer to show that the square root is taken of a negative number. Therefore pointing out the unreal root in red color.

public string NegativeDeterminant(double b, double a, double c)

{

return (((4 * a * c) - (b * b)).ToString());

}

Calculate the First Root of the equation:

Quadratic Equation 1st Root C# Code

public string FirstRealRootQuad(double a, double b, double c)

{

if (DeterminantQuad(b, a, c) >= 0)

{

return ((((-b) + (Math.Sqrt(DeterminantQuad(b, a, c)))) / (2 * a)).ToString());

}

else

{ return ((-b / (2 * a)).ToString() + "+ i" + (Convert.ToDouble(NegativeDeterminant(b, a, c)) / (2 * a)).ToString()); }

}

Calculate the Second Root of the equation:

Quadratic Equation 2nd Root C# Code

public string SecondRealRootQuad(double a, double b, double c)

{

if (DeterminantQuad(b, a, c) >= 0)

{

return ((((-b) - (Math.Sqrt(DeterminantQuad(b, a, c)))) / (2 * a)).ToString());

}

else

{ return ((-b / (2 * a)).ToString() + "- i" + (Convert.ToDouble(NegativeDeterminant(b, a, c)) / (2 * a)).ToString()); }

}

TextBox Text Change Event Code; This code is similar for all the 3 Text Boxes

private void QuadA_TextChanged(object sender, EventArgs e)

{

try

{

a = Convert.ToDouble(QuadA.Text);

b = Convert.ToDouble(QuadB.Text);

c = Convert.ToDouble(QuadC.Text);

QuadRootA.Text = FirstRealRootQuad(a, b, c);

QuadRootB.Text = SecondRealRootQuad(a, b, c);

}

catch { }

if (QuadRootA.Text.Contains("i"))

{

QuadRootA.ForeColor = Color.Red;

}

if (QuadRootB.Text.Contains("i"))

{

QuadRootB.ForeColor = Color.Red;

}

Show and Invert RGB Colors in C#

2013-03-14T20:41:00.000+05:30

This post will demonstrate how to show and convert colors when the Red Green & Blue values of those colors are given. We simple use a function and supply the Red, Green and Blue components in the parameter list. We shall also see how to Invert a color. In the image below the text color is set by the user. The background color is automatically set which is the Invert of the Text color. See image below to have a look at the final output of our WinForms application:

The Color.FromArgb( ) function sets the color of any element by taking in 3 basic parameters. These parameters set the RGB components and create the color we need. The 'A' in Argb specifies the Alpha value which sets the brightness of the color. Although its not necessary, it is a good practice to set the Alpha value of a color. This enables you to fine tune the color even further.

We also see how to Invert a color. Inverting a color simply means taking the opposite value of each component and merge them to create the Inverted color. To perform inversion in the RGB values, we simply minus the color from the integer 255. If we have a color component with value 255 then the inverted color component is (255 - 255) i.e. 0 (Zero). Likewise the color component with value 100 is (255 - 100) i.e. 155. The invert of Black is White as we all know. As you can see in the above image, the invert color of blue is yellow.

using System;

using System.Collections.Generic;

using System.Drawing;

using System.Windows.Forms;

namespace Color_Show_by_Integer_Value

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void btnShow_Click(object sender, EventArgs e)

{

int RedValue = Convert.ToInt16(TRed.Text);

int GreenValue = Convert.ToInt16(TGreen.Text);

int BlueValue = Convert.ToInt16(TBlue.Text);

LabelColor.BackColor = Color.FromArgb(RedValue,GreenValue,BlueValue);

LabelExplain.BackColor =

Color.FromArgb(255 - RedValue, 255 - GreenValue, 255 - BlueValue);

LabelExplain.ForeColor = Color.FromArgb(RedValue, GreenValue, BlueValue);

}

Download Visual Studio 2012 Code Directly from Here

Named Arguments in .Net C#

2013-03-01T18:53:00.001+05:30

Named Arguments are an alternative way for specifying parameter values in function calls. They work so that the position of the parameters would not pose problems. Therefore it reduces the headache of remembering the positions of all parameters for a function. It also helps to avoid the excess overloading of functions that contain less or more of the same set of parameters.

They work in a very simple way. When we call a function, we would write the name of the parameter before specifying a value for the parameter. In this way, the position of the argument will not matter as the compiler would tally the name of the parameter against the parameter value. This makes it unnecessary to remember the organisation of the parameters in the function definition.

Consider a function definition below:

static int remainder(int dividend, int divisor)

{

return( dividend % divisor );

}

Now we call this function using two methods with a Named Parameter; we introduce parameter values after writing the name of parameter with a colon:

int a = remainder(dividend: 10 , divisor: 5);

int a = remainder(divisor: 5 , dividend: 10);

Note that the position of the arguments have been interchanged, both the above methods will produce the same output i.e. they would set the value of a as 0(which is the remainder when dividing 10 by 5).

That's it from Named Arguments. Have a look at Optional Arguments for more.

Optional Parameters in .Net

2013-03-01T15:52:00.003+05:30

Optional Arguments were introduced in C# 4.0 and this article will show you how to use them. Optional Arguments are necessary when you specify functions that have a large number of arguments. It can cut down time by making you pass on argument values to the most needy parameters in a situation.

Optional Arguments are what their name suggests i.e. even if you do not specify them, its perfectly OK. But it doesn't mean that they have not taken a value. In fact we specify some default values that the Optional Parameters take when values are not supplied in the function call. In this way we gain the functionality of easily setting values once and using these values several times as a default unless something different is needed.

The values that we supply in the function Definition are some constants. Note that we can only supply one default value for one parameter. This makes sense as there can only be one default value for one property by definition. But this also means that multiple values cannot be assigned and given priorities in different situations. We have to check for ourselves which value fits in best in a given situation and supply it in a function call to that variable. These default values are to be used in case no value is supplied in the function call. These values are specified by typing in equations(with a single = sign) instead of just the declaration of variables.

For example, we write

static void Func(Str = "Default Value")

instead of static void Func(int Str)

If you didn't know this technique, you were probably using Function Overloading, but that technique requires multiple declaration of the same function. Using this technique you can define the function only once and have the functionality of multiple function declarations.

Consider a function that is defined with two optional parameters. When only one parameter is supplied, the second parameter takes the default value. We can then write the function in such a way as to check if the second parameter value received or not. If the parameter value is the default one then just ignore it and continue to work with the first parameter value. Thus we have the function overloading effect in which a same named function takes on two different tasks.

When we supply two different parameters, the function works with both the values. This can be easily achieved using the if statement. Just check which parameter has and does not have the default value.

When using this technique it is best that you have declared optional & required parameters both. i.e. you can specify both types of parameters in your function declaration to get the most out of this technique.

An example of a function that uses both types of parameters is shown below:

static void Func(String Name, int Age, String Address = "N/A")

In the example above, Name & Age are required parameters. The string Address is optional, if not specified, then it would take the value "N/A" meaning the Address is not available.

For the above example, you could have two types of function calls:

Func("John Chow", 30, "America");

Func("John Chow", 30);

That's it from Optional Arguments. Have a look at Named Arguments for more information on parameter types.

Printing a Windows Form to Printer and File in C#

2013-02-22T03:59:00.001+05:30

The objective here is to print a Windows Form to the Printer or a File on the HDD. You can also have a Print Preview before you print a WinForm. See the Form below that we shall print. We will encounter one small problem i.e. the button, radio buttton and textbox are not required for printing. We only wish to print the written text written above in Green color. There is VS 2012 source code at the very end. See the code and explanations below the image:

Visual Studio 2012 and 2010 as well come with a very special and useful tool in the tool box. Located in the Visual Basic PowerPacks section with many other useful tools(that we shall explore in later posts), it is named PrintForm and makes printing very easy for everyone. The whole form prints as it is to a file or printer. Also note that the borders of the window are NOT printed which is really cool! So you dont have to worry about the borders but you do have to worry about some unwanted stuff, like for example the "Ready To Print()" button with the other radio buttons and textbox shown above iare not really needed in the print. So we simply trim the size of the form before we fire the Print() function of the PrintForm. Watch the code below:

namespace Print_a_WinForm

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

// The PrintAction determines what the PrintForm object actually

// does. It has three simple options to choose.

// Below, we chose it to "PrintToPreview"

// It simply opens a Print Preview Window.

private void btnPrintPreview_CheckedChanged(object sender, EventArgs e)

{

if (btnPrintPreview.Checked == true)

{

printForm1.PrintAction =

System.Drawing.Printing.PrintAction.PrintToPreview;

}

// Below we have set the PrintAction to PrintToFile

// It does exactly as it says.

// It creates a Image file on the Hard Disk of the

// current state/look of the Windows form.

// The file name is selected in the TextBox and set to the

// PrintFileName property of the PrintForm object.

private void btnPrintToFile_CheckedChanged(object sender, EventArgs e)

{

if (btnPrintToFile.Checked == true)

{

printForm1.PrintAction =

System.Drawing.Printing.PrintAction.PrintToFile;

printForm1.PrintFileName = txtFileName.Text;

}

// Set the PrintAction to PrintToPrinter

// to give output to a physical printer that you may have.

private void btnPrintToPrinter_CheckedChanged(object sender, EventArgs e)

{

if (btnPrintToPrinter.Checked == true)

{

printForm1.PrintAction =

System.Drawing.Printing.PrintAction.PrintToPrinter;

}

// The process of trimming the unwanted controls is

// by simply reducing the height of the Form.

//Here we have reduced it from 376 to 289.

// After that the unwanted controls are no longer visible

// and it is safe to print the form.

private void btnReady_Click(object sender, EventArgs e)

{

this.Height = 289;

printForm1.Print();

}

Download Visual Studio 2012 Code Directly from Here

Display all Files and Folders in a Directory in C#

2013-01-09T16:32:00.004+05:30

You can easily list and display all the files and folders in a C# application using the DirectoryInfo class. First have a look at the application screenshot which uses this class to display the Files and Folders in a specified directory. All the Files and Folders are displayed in a ListView.

An object created with the DirectoryInfo class has two methods viz. GetFiles() and GetDirectories() which return an array of Files and Directories respectively. The GetFiles() method can only be used in the subclass FileInfo. These Files and Directories are then displayed in a ListView by converting the Files and Directories to a ListViewItem. These ListViewItems are created by converting and using the Name Property of the FileInfo and DirectoryInfo subclasses.

Every File and Directory is contained in a FileInfo and DirectoryInfo class encapsulated with all the properties and functions that help us to identify and use the Files and Directories. The properties include Name, FullName, Creation Time, LastAccessTime, LastWriteTime, Parent, Root to name a few. The functions that apply to this class are the Create, Refresh, Delete, MoveTo etc. These are just some of the functions and properties available to the FileInfo and DirectoryInfo Class. There are many more to explore so make sure you try them all. These are properties that can help identify a particular file or a group of files when you have a large collection. You can filter files from a directory by setting values for these above mentioned properties. We will just use the Name Property to list the Name of the Files and Folders in a Directory for a quick understanding. You can use any other property in much the same way. Watch the code below:

namespace Show_Files_and_Folders

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void Form1_Load(object sender, EventArgs e)

{

MessageBox.Show("http://www.code-kings.com");

}

private void btnChooseDir_Click(object sender, EventArgs e)

{

if (DirDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)

{

txtDirLocation.Text = DirDialog1.SelectedPath.ToString();

}

private void btnShowFiles_Click(object sender, EventArgs e)

{

System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(txtDirLocation.Text);

foreach (System.IO.FileInfo f in dir.GetFiles("*.*"))

{

ListViewItem lSingleItem = listView1.Items.Add(f.Name);

}

private void btnShowFolders_Click(object sender, EventArgs e)

{

System.IO.DirectoryInfo dir = new System.IO.DirectoryInfo(txtDirLocation.Text);

foreach (System.IO.DirectoryInfo getdirs in dir.GetDirectories("*.*"))

{

ListViewItem lSingleItem = listView2.Items.Add(getdirs..Name);

}

Directly Download the Source Code in Visual Studio 2012 Here

Identify Any Key Pressed on Keyboard

2013-01-03T22:09:00.001+05:30

Now you can capture any key pressed on the keyboard, not only restricted to the English or your language letters but also various other keys such as the Windows Key, Properties Key, F1, F2 and other function buttons, the Home, PageUp and PageDown etc.

When you check the value of e.KeyCode.ToString() for various other keys such as the WinKey you will get a value of "LWin" for the String returned. The value of the KeyCode() is exactly the same for the capital and small letters of the languages but the value for the special buttons varies as shown below:

"LWin" for WinKey (Windows Key)
"ControlKey" for Control Key
"ShiftKey" for Shift Key
"Menu" for the Alt Key (Alternate)
"Apps" for the Property Key (usually beside the Right Ctrl Key)
"Oemtilde" for the tilde Key (Left of the Numerical 1)
"Escape" for Escape Key
"Next" for Page Down
"Up" for Up, "Down" for Down etc.
"Return" for Enter Key
"A" for A; "B" for B "C" for C etc.
"a" for a; "b" for b; "c" for c etc.

Watch Code Below followed by the Source Code:

namespace Check_Key_Pressed

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

this.KeyDown += Form1_KeyDown;

}

void Form1_KeyDown(object sender, KeyEventArgs e)

{

lblKeyPressed.Text = e.KeyCode.ToString();

if (e.KeyCode.ToString() == "ControlKey")

{

checkCtrl.Checked = !checkCtrl.Checked;

}

if (e.KeyCode.ToString() == "ShiftKey")

{

checkShift.Checked = !checkShift.Checked;

}

if (e.KeyCode.ToString() == "Menu")

{

checkAlt.Checked = !checkAlt.Checked;

}

private void Form1_Load(object sender, EventArgs e)

{

MessageBox.Show("Created by www.Code-Kings.com");

}

Directly Download Source Code for Visual Studio 2012 Here

Draw a Bitmap Image on WinForm During Runtime

2012-12-31T15:36:00.001+05:30

Would you like to draw a bitmap on the screen? Drawing on the WinForms is very easy using the Graphics() Class and Objects. You can draw any type of image by taking the image from your HDD and including file types like BMP, JPEG, PNG etc. Watch the screenshot of a file that is drawn to the WinForm:

The image with the Red background is drawn on a Panel. The panel acts as the Graphics() surface to which we have drawn the image. We can choose to draw on any control including the Form itself. In the case above, we have used the whole Panel to draw an unscaled image simply taken from the HDD. Press the Choose Bitmap button on the Top Right and you will be presented with the OpenFileDialog. You can then choose your image file and set it to display on the Form's Panel. See code below followed by the source code at the end:

namespace Drawing_a_Bitmap

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

Below we have created the Graphics() object with which we shall work in the program. This Graphics() object is used to create surfaces and to draw to them. We have used the Panel control to draw the Bitmap on. The first thing we need to do is give the choice to the user to choose the bitmap file through a OpenFileDialog. Then we capture the image in a Bitmap Object by supplying the FileName of the OpenFileDialog as a parameter. Then we simply create the drawing surface using the CreateGraphics() function. The final line of code draws the bitmap on the position 0,0 starting from the Top Left corner as the starting point.

Graphics graphics;

private void btnChoose_Click(object sender, EventArgs e)

{

if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)

{

Bitmap bitmap = new Bitmap(openFileDialog1.FileName.ToString());

bitmap.InitializeLifetimeService();

graphics = this.TestPanel.CreateGraphics();

graphics.DrawImage(bitmap, 0, 0);

}

The code below has one difference and that is we have supplied a fourth and fifth parameter to the DrawImage() function. This overload gives us the Custom Width in the 4th Parameter and the Custom Height in the 5th Parameter. These values are taken and converted to an Integer. Type into the variables x and y respectively from the two TextBoxes labeled Width and Height on the form then click button.

private void btnResizedBitmap_Click(object sender, EventArgs e)

{

if (openFileDialog1.ShowDialog() == System.Windows.Forms.DialogResult.OK)

{

Bitmap bitmap = new Bitmap(openFileDialog1.FileName.ToString());

bitmap.InitializeLifetimeService();

int x = Convert.ToInt16(txtWidth.Text);

int y = Convert.ToInt16(txtHeight.Text);

graphics = this.TestPanel.CreateGraphics();

graphics.DrawImage(bitmap, 0, 0, x, y);

}

On pressing the Reset button, we Clear() the Graphics Object which brings a plane solid color to the drawing surface of our choice.

private void btnResetBitmap_Click(object sender, EventArgs e)

{

graphics.Clear(Color.White);

}

private void btnExit_Click(object sender, EventArgs e)

{

this.Close();

}

The graphics drawn above is not persistent i.e. when we resize or mimize the form, we may encounter a loss of a portion or the whole image. To avoid this, we must use the OnPaint() function to draw all drawings.

Directly Download the Source Code in Visual Studio 2012

Here

Create a Web Browser in C#

2012-12-24T14:38:00.002+05:30

This article shows you how to easily create a Web Browser with minimal standard functions containing all standard buttons like the Back, Forward Stop and Home buttons. See below image for more details:

Watch code below with step by step explanations:

namespace Web_Browser_CSharp
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

The browser understands Uri as the actual web address of a website. The Load event of the form sets the URL of WebBrowser to the String that is present in the address bar TextBox to create a URI. See below on how to create a Uri object:

private void Form1_Load(object sender, EventArgs e)
{
Uri url = new Uri(txtAddress.Text);
webBrowser1.Url = url;
}

The first event that occurs when a new page loads is the Navigating Event. This occurs just before the Web Browser starts loading the next page.

private void webBrowser1_Navigating(
object sender, WebBrowserNavigatingEventHandler e)
{
lblStatus.Text = "Page Navigating";
}

The second event fired is the Navigated() Event that acknowledges about the success of Navigating and loading the page. After the Navigated() Event, the Browser continues to load the files of the Web Page.

private void webBrowser1_Navigated(
object sender, WebBrowserNavigatedEventHandler e)
{
lblStatus.Text = "Page Navigated";
}

After all the Files in the Web Page have been loaded, the Browser fires the DocumentCompleted() Event. One very important point to notice here: when a document completes loading, its page URL usually differs by some added text. This happens after loading of the page is done. This text in the addressbar is NOT the exact same text that we wrote in the Address bar. Take for example you went to www.ABC.com but after you reached there, you were redirected to www.ABC.com/home/guest. Therefore, we need to continously update the address bar.

  private void webBrowser1_DocumentCompleted(
  object sender, WebBrowserDocumentCompletedEventArgs e)
{
lblStatus.Text = "Page Loaded Successfully";
txtAddress.Text = webBrowser1.Url.ToString();
}

When the Go button is clicked we check for a valid URL supplied and supply it to the Web Browser for Navigation.

  private void btnGo_Click(object sender, EventArgs e)
{
try
{
Uri url = new Uri(txtAddress.Text);
webBrowser1.Url = url;
}
catch (Exception)
{
MessageBox.Show("Invalid URL Supplied", "Error");
}
}

When the Stop Sign is clicked, the Browser cancels all pending Navigations and stops all stops any Dynamic Page Elements such as sound and animations.

  private void btnStop_Click(object sender, EventArgs e)
{
webBrowser1.Stop();
}

The GoBack() method of the Web Browser does what it reads i.e. it loads the previous page in the Web Browser.

  private void btnBack_Click(object sender, EventArgs e)
{
webBrowser1.GoBack();
}

Similarly the GoForward() method goes one page forward if available.

  private void btnForward_Click(object sender, EventArgs e)
{
webBrowser1.GoForward();
}

When the Home button is clicked, the Web Browser navigates to Home Page of its Current User.

  private void btnGoHome_Click(object sender, EventArgs e)
{
webBrowser1.GoHome();
}

The following code handles the Search feture of your Web Browser. A set of predefined text followed by your search keyword are to be supplied to the Web Browser for Navigation and that's it. I have used the if....else statements to check for the search engine and then set the URL parameter of the Web Browser.

  private void btnSearch_Click(object sender, EventArgs e)
{
if (radioGoogle.Checked == true)
{
Uri url = new
Uri("http://google.com/search?q=" + textSearch.Text);
webBrowser1.Url = url;
}

if (radioBing.Checked == true)
{
Uri url = new
Uri("http://www.bing.com/search?q=" + textSearch.Text);
webBrowser1.Url = url;
}

if (radioAsk.Checked == true)
{
Uri url = new
Uri("http://www.ask.com/web?q=" + textSearch.Text);
webBrowser1.Url = url;
}
}

  private void btnSavePage_Click(object sender, EventArgs e)
{
webBrowser1.ShowSaveAsDialog();
}

  private void btnPrint_Click(object sender, EventArgs e)
{
webBrowser1.ShowPrintDialog();
}

  private void btnPrintPreview_Click(object sender, EventArgs e)
{
webBrowser1.ShowPrintPreviewDialog();
}

  private void btnPageSettings_Click(object sender, EventArgs e)
{
webBrowser1.ShowPageSetupDialog();
}

The code below deals with the showing of another form that shows the source code the current Web Page. We have set the public string value to the source html and then it shows in the next form. When the next form loads, it copies the public string value into its RichTextBox.

private void btnSourceCode_Click(object sender, EventArgs e)
{
frmSourceCode frm = new frmSourceCode();
frm.strhtml = webBrowser1.DocumentText;
frm.Show();
}

}
}

Directly Download Source Code in Visual Studio 2012 Here

How to Multithread in C#

2012-12-22T22:03:00.001+05:30

This WinForms C# Application will show you the basics of creating and using a thread and a bit more. It will actually show you multiple threads working simultaneously. As you know that threads are meant to do multiple jobs at a time by utilizing the different logical cores of the CPU, we will use this to work the value of multiple Int64 variables. See the application screenshot when the application starts and look for the source code at the end:

What we want in our above application is to created two Int64 variables and simply increase their values using two different threads. When we click the START button, the thread initializes and the counting process starts. The value of the variable increases continuously in the background. When we click the Show Current Value button, the value currently stored in the Int64 variable is shown in the TextBox. You may click the Show Current Value button as many times as you want. Everytime you get an incremented value that we have managed to get via an Infinite Loop.

Lets start by adding the code to create the variables in the program:

public Int64 FirstInt = new Int64();

public Int64 SecondInt = new Int64();

As you might have guessed the FirstInt and SecondInt are the variables that we will work with. These are defined at the start of the code outside the scope of all functions so that they are visible to every function.

Next we create the two functions that will work on the two different threads. These functions will start to increase the value of the two variables continuously using an infinite loop. To create an Infinite Loop, simple leave the middle section of the loop blank. i.e. There will be no check applied during the iteration process so that the loop never checks for a value to stop itself. Watch the code below:

private void StartTextCount1()

{

for (int m = 0; ; m++)

{

FirstInt++;

}

private void StartTextCount2()

{

for (int n = 0; ; n++)

{

SecondInt++;

}

The next thing we need to assure is that we have initialized the value of our variables. Because incrementing the values of an uninitialized variable may result in an error or may give garbage values. So in the Load() event of the form we set the value of the variables to 0 each. See code below:

private void Form1_Load(object sender, EventArgs e)

{

FirstInt = 0;

SecondInt = 0;

}

Now that all values have been set up and the form loaded, we need the simple code to create a new thread when the first start button that is above of two is clicked. See code below to create a new thread:

private void Start1_Click(object sender, EventArgs e)

{

System.Threading.Thread Thread1 =

new System.Threading.Thread(StartTextCount1);

Thread1.Start();

}

The thread created is called Thread1. This thread runs the StartTextCount() function. The thread requires the parameter that is the function that it will work on. When we call the Start() method of the Thread, the method in the parameter is called via the thread. Similarly write code for the second button to create the second thread:

private void Start2_Click(object sender, EventArgs e)

{

System.Threading.Thread Thread2 =

new System.Threading.Thread(StartTextCount2);

Thread2.Start();

}

The last thing that remains is to create the code to show the variable value into the TextBox. This code below converts the Int64 value of the variable into a String. Then it displays it in the Black background TextBox called Text1. The same code applies for the second TextBox named Text2.

private void ShowValue1_Click(object sender, EventArgs e)

{

Text1.Text = FirstInt.ToString();

}

private void ShowValue2_Click(object sender, EventArgs e)

{

Text2.Text = SecondInt.ToString();

}

The output screenshots below were taken at different intervals:

Directly Download Source Code in Visual Studio 2012 Here.

Reading a Text File in C# through Stream Reader

2012-11-10T22:06:00.000+05:30

This C# program shows you how you can load an external Text File from your Hard Disk into a Multi-Line TextBox. The procedure consists of creating the StreamWriter object to begin working which is the feature of this code. Watch the image above.

The coding begins with the choose path button. We use it to open up a OpenFileDialogBox which is used to retrieve the file path of an existing file on a hard disk. Opening it consists of invoking the Show() method. When the user successfully selects a valid file, the FileName property of the OpenFileDialogBox is updated to carry the full length String value of the file location. Then we save the file location in the textbox named txtChoose Watch the code:

private void btnChoose_Click(object sender, EventArgs e)

{

openFileDialog1.ShowDialog();

txtChoose.Text = openFileDialog1.FileName.ToString();

}

Now that we have the file location of the text file, we can load the text file Line by Line into the Multi-Line extbox. Note that when we create a textbox by default it is a single lined textbox. To make it Multi-Line simply change the Multiline property of the textbox to true. Watch the code below to create a StreamReader Object and fill the Multi-Line textbox subsequently:

private void btnLoadFile_Click(object sender, EventArgs e)

{

int counter = 0;

string CurrentLine;

// Read the file and display it line by line.

System.IO.StreamReader FileToRead =

new System.IO.StreamReader(txtChoose.Text);

while ((CurrentLine = FileToRead.ReadLine()) != null)

{

MainTextBox.AppendText(CurrentLine);

MainTextBox.AppendText("\n");

counter++;

}

FileToRead.Close();

Console.ReadLine();

}

In the above code, we have a while loop to keep reading lines until we have reached to the end of the file. We append lines using the AppendText() function inside the for loop. This function does not write lines by default. This is because the text is read as a sequence of characters only. Thus to create the line by line effect, we add the AppendText("\n") method. Without this the text loaded would look inconsistent.

Do not forget to close the open file through the FileToRead.Close() method. In case a file is open this program or any other program, you would not be able to edit it externally.

Please Note :
** Do not Copy & Paste code written here ; instead type it in your Development Environment
** Testing done in .Net 4.5 but code should be very similar for previous versions of .Net
** Direct Download Source Code Here

Working With Enumerations in C#

2012-11-02T21:40:00.001+05:30

.Net Enumeration Basics

Enumerations or simply Enums in short provide convenient ways to create and access named numeric constants. These constants can have custom Indexable values that represent each individual element. Unlike arrays, they can have values which are not incremental in steps of ‘1’. Also, these values can be of types other than integers (which is the default) such as bytes, Boolean etc.

A single Enumeration itself has a group of values associated with it. We create an Enum Object before attempting to use the functions that are offered. This value when used with a dot operator on an Enumeration gives the state of the Enumeration Object. When we initialize new Enums of a previously defined Enum, we don’t use the new operator. The new Enums are almost immediately created and initialized to an initial value within the Enum.

Create an Enum

Lets take an example to illustrate this. The traffic lights should provide a simple but complete example on how to create and use an Enumeration. Start off by creating the Enumeration itself:

enum TrafficLights

{

Red,

Yellow,

Green

};

Note how commas are used instead of semicolons used otherwise. Next, create a traffic lights object to make use of the Enum. The Enum is initialized to the value Red:

TrafficLights Light1 = TrafficLights.Red;

To change the value of this Enum from Red to say, Green:

Light1 = TrafficLights.Green;

Converting Enums between their Name and Value

Now we shall see what value is possessed by an Enum. This value is actually the integer value of the present selected string value. Casting explicitly can bring out the value of the selection. To perform a conversion, we must know the corresponding values of our traffic lights first. Since we have not explicitly defined values, the implicit values are 0 for Red, 1 for Yellow and 2 for Green. Lets suppose we have an Integer that takes in the present underlying Integer value of the Traffic Signal:

int I;

I = (int)Light1;

The method used above is called Explicit Casting. Simply put the variable type in brackets before the Enum to convert it to its integral value.

We can also do the reverse i.e. we can get the Enum members from their Integer values. Just use the Explicit Cast again. See below how to create a Red traffic signal from its Integer value 0:

TrafficLights LightR = (TrafficLights)0;

Now that we know Enums have Integer values associated with them, then it is only logical to think that they can be used to perform logical operations as well. Suppose we have a traffic light and want to check if its not Red i.e. Green or Yellow. Then we can use the following code to apply the check through an if statement:

if (LightR > 0)

{

//Do This

}

What is Upcasting and Downcasting in C# ?

2012-10-19T13:39:00.001+05:30

Upcasting is basically an object creation mechanism by which we create objects by referring to their base class. We do this by replacing the sub-class name by the base-class name in the object definition. This particularly comes in handy when you know that a specialized object created will not necessarily use all the functions of a specialized sub-class has got to offer. So, replace a sub-class(inherited class) by a base-class and all you have done is Upcasting.

This concept can be well understood if we take an example. Lets suppose we have three classes. One parent or generalized class called the LIVING_THINGS and the two subclasses ANIMAL and BIRD which inherit from the former. The parent class or the baseclass has the function, say Born()and Die(). The specialized class have the functions, say Run() and Fly() for ANIMAL and BIRD respectively.

To create an ANIMAL and BIRD object you would usually use the syntax below:

ANIMAL animal = new ANIMAL();
BIRD bird = new BIRD();

In the code above, the methods Run()and Fly() work perfectly with the objects created. This is the normal way you would use to create the objects. The reference used to create the object is exactly the same as the object type created during run-time. The methods of the subclass work just fine.

But, to create an Upcast, you would use the syntax below:

LIVING_THINGS animal = new ANIMAL();

In the code above, even though we have created an object of the type ANIMAL and BIRD, the reference used is actually of the base-class. Therefore the methods Run() and Fly() are not available to these objects. Instead only the functions available in the base-class such as Born() and Die() are available.

This can be useful if you want only basic functions available at the start and want to later convert these objects of their original types to make their specialized functions available.

This can be done with the help of Downcasting. Downcasting can change the reference types of these objects to the specialized subclass to make available the functions which were not available otherwise. Watch the code below:

ANIMAL new_animal = animal as ANIMAL;

In the above code, we created a new object and converted it to an ANIMAL type. It should be a good practice to actually check if the object to be converted supports the conversion. This can be done with the help of the is keyword

if (animal is ANIMAL)

{

ANIMAL new_animal = animal as ANIMAL;

new_animal.Run( );

}

With the help of Downcasting, we restored all the functions and properties that the ANIMAL object should have. Now it behaves as a proper ANIMAL object.

Read a Value from the Windows Registry in C# 5.0

2012-10-14T16:33:00.003+05:30

In the previous post we saw how to create a registry i.e. write a value into the Windows registry. Now we shall retrieve back the exact value that we had written before. To do this we need to retrieve the value in a String variable.

We shall take the value by its exact location & the name of the property. Note that the property resides in a folder and the value we read is the Data of that property. Have a look at the present snapshot of the system:

Root Folder is HKEY_CURRENT_USER
Parent Folder is CSharp_Website
Property/Attribute/Key Name is Really
Property/Attribute/Key Value is Yes!

The GetValue() function does this work impressively for us. Considering the values we have above, we create a String that provides the correct path for the Key Value. The code is shown below:

private void btnReadReg_Click(object sender, EventArgs e)

{

string x = (string)Registry.GetValue("HKEY_CURRENT_USER\\CSharp_Website","Really","DefaultValue");

MessageBox.Show(x,"Read Registry");

}

How to Write into Windows Registry in C# 5.0

2012-10-12T13:07:00.001+05:30

Developing a real application almost everytime requires the storing of some important values in the Windows Registry. The Windows Registry gives the power to store variables of different types by any application and use them as and when required. You can also store values in the form of texts, external files or saved documents then why use the Registry? Because the Registry allows above all the values to be stored and read in a standardized way which can be read by compatible applications as and when required. Also, the deletion of corresponding files does not alter the information in the Windows Registry. The contents have to be modified explicitly to delete or modify existing values.

The windows registry can be modified using the C# programming interface. In this section we shall see how to write to a known location in the windows registry. The Windows registry consists of different locations in an explorer style and looks as shown below:

The Keys at the parent level are HKEY_CLASSES_ROOT, HKEY_CURRENT_USER etc. When we refer to these keys in our C# program code, we omit the HKEY & the underscores. So, to refer to the HKEY_CURRENT_USER, we use simply CurrentUser as the reference. Well, this reference is available from the Microsoft.Win32.Registry class. This Registry class is available through the reference:

using Microsoft.Win32;

.We use this reference to create a Key object. An example of a Key object would be:

Microsoft.Win32.RegistryKey key;

Now this key object can be set to create a Subkey in the parent folder. In the example below, we have used the CurrentUser as the parent folder:

key = Microsoft.Win32.Registry.ClassesRoot.CreateSubKey("CSharp_Website");

Next we can set the Value of this Field using the SetValue() funtion. See below:

key.SetValue("Really", "Yes!");

The output shown below:

As you will see in the picture below, you can select different parent folders(such as ClassesRoot, CurrentConfig etc.) to create and set different key values:

Create Form TextBox Controls at Runtime

2012-10-06T13:35:00.000+05:30

Sometimes you might want to create a user control at run-time. These are times when you are not sure of what controls to include during the form designing phase of your program. What we usually do is to draw all available controls in the designer form. Then at run-time we simply make the controls invisible leaving us with workable visible controls. But there is a better method. What should be done is exactly illustrated below. You should write code to draw the controls at run-time. You should draw the controls when needed to save memory.

Creating controls at runtime can be very useful if you have some conditions that you might want to satisfy before displaying a set of controls. You might want to display different controls for different situations. CSharp provides an easy process to create them. If you look carefully in the Designer.cs file of any form, you will find codes that initiate the creation of controls. You will see only some properties set, leaving other properties default. And this is exactly what we will do here. We write code behind the Form that creates the controls with some properties that we set & others that are simply set to their default value by the Compiler.

The main steps to draw controls are summarized below:

Create/Define the control or Array of controls
Set the properties of the control or individual controls in case of Arrays
Add the control/s to the form or other parent containers such as Panels
Call the Show() method to display the control

The code below shows how to draw controls:

namespace Create.Controls.At.Runtime

{

public partial class Form1 : Form

{

public Form1()

{

InitializeComponent();

}

private void Form1_Load(object sender, EventArgs e)

{

TextBox[] tb = new TextBox[7];

for (int i = 0; i <= 6; i++)

{

tb[i] = new TextBox();

tb[i].Width = 150;

tb[i].Left = 20;

tb[i].Top = (30 * i) + 30;

tb[i].Text = "Text Box Number: " + i.ToString();

this.Controls.Add(tb[i]);

tb[i].Show();

}

Check for Anagrams in .Net C# 5.0

2012-09-11T19:43:00.000+05:30

This program shows how you can check if two given input strings are Anagrams or not in CSharp language. Anagrams are two different words or combinations of characters which have the same alphabets and their counts. Therefore a particular set of alphabets can create many permutations of Anagrams. In other words, if we have the same set of characters in two words(strings) then they are Anagrams.

We create a function that has input as a character array pair of inputs. When we get the two different sets of characters, we check the count of each alphabet in these two sets. Finally, we tally and check if the value of character count for each alphabet is the same or not in these sets. If all characters occur at the same rate in both the sets of characters, then we declare the sets to be Anagrams otherwise not.

See the code below for C#:

using System;

namespace Anagram_Test

{

class ClassCheckAnagram

{

public int check_anagram(char[] a, char[] b)

{

Int16[] first = new Int16[26];

Int16[] second = new Int16[26];

int c = 0;

for (c = 0; c < a.Length; c++)

{

first[a[c] - 'a']++;

}

c = 0;

for (c=0; c<b.Length; c++)

{

second[b[c] - 'a']++;

}

for (c = 0; c < 26; c++)

{

if (first[c] != second[c])

return 0;

}

return 1;

}

using System;

namespace Anagram_Test

{

class Program

{

static void Main(string[] args)

{

ClassCheckAnagram cca = new ClassCheckAnagram();

Console.WriteLine("Enter first string\n");

string aa = Console.ReadLine();

char[] a = aa.ToCharArray();

Console.WriteLine("\nEnter second string\n");

string bb = Console.ReadLine();

char[] b = bb.ToCharArray();

int flag = cca.check_anagram(a, b);

if (flag == 1)

Console.WriteLine("\nThey are anagrams.\n");

else

Console.WriteLine("\nThey are not anagrams.\n");

Console.ReadKey();

}

Using Indexers in C#

2012-09-11T15:30:00.001+05:30

Indexers are elements in a C# program that allow a Class to behave as an Array. You would be able to use the entire class as an array. In this array you can store any type of variables. The variables are stored at a separate location but addressed by the class name itself. Creating indexers for Integers, Strings, Boolean etc. would be a feasible idea. These indexers would effectively act on objects of the class.

Lets suppose you have created a class indexer that stores the roll number of a student in a class. Further, lets suppose that you have created an object of this class named obj1. When you say obj1[0], you are referring to the first student on roll. Likewise obj1[1] refers to the 2nd student on roll.

Therefore the object takes indexed values to refer to the Integer variable that is privately or publicly stored in the class. Suppose you did not have this facility then you would probably refer in this way:

obj1.RollNumberVariable[0]
obj1.RollNumberVariable[1].

where RollNumberVariable would be the Integer variable.

Now that you have learnt how to index your class & learnt to skip using variable names again and again, you can effectively skip the variable name RollNumberVariable by indexing the same.

Indexers are created by declaring their access specifier and WITHOUT a return type. The type of variable that is stored in the Indexer is specified in the parameter type following the name of the Indexer. Below is the program that shows how to declare and use Indexers in a C# Console environment:

using System;

namespace Indexers_Example

{

class Indexers

{

private Int16[] RollNumberVariable;

public Indexers(Int16 size)

{

RollNumberVariable = new Int16[size];

for (int i = 0; i < size; i++)

{

RollNumberVariable[i] = 0;

}

public Int16 this[int pos]

{

get

{

return RollNumberVariable[pos];

}

set

{

RollNumberVariable[pos] = value;

}

using System;

namespace Indexers_Example

{

class Program

{

static void Main(string[] args)

{

Int16 size = 5;

Indexers obj1 = new Indexers(size);

for (int i = 0; i < size; i++)

{

obj1[i] = (short)i;

}

Console.WriteLine("\nIndexer Output\n");

for (int i = 0; i < size; i++)

{

Console.WriteLine("Next Roll No: " + obj1[i]);

}

Console.Read();

}

Indexers can be overloaded as well. Give it a try!

Indexers are different from Properties in the following ways:

Build a Typing Master Game in C#

2012-09-08T14:32:00.000+05:30

This is a basic typing game concept. The form will display random letters. If the player types one of them, it disappears and the accuracy rate goes up. If the player types an incorrect letter, the accuracy rate goes down. As the player keeps typing letters, the game goes faster and faster, getting more difficult with each correct letter. If the form fills up with letters, the game is over!

DIRECT DOWNLOAD CODE FOR THIS PROGRAM HERE

Set up the Timer control:

Did you notice how your Timer control didn’t show up on your form? That’s because the Timer is a non-visual control. It doesn’t actually change the look and feel of the form. It does exactly one thing: it calls a method over and over again. Set the Timer control’s Interval property to 800, so that it calls its method every 800 milliseconds. Then double-click on the timer1 icon in the designer. The IDE will do what it always does when you double-click on a control: it will add a method to your form. This time, it’ll add one called timer1_Tick. Here’s the code for it:

private void timer1_Tick(object sender, EventArgs e)

{
    // Add a random key to the ListBox
    listBox1.Items.Add((Keys)random.Next(65, 90));
    if (listBox1.Items.Count > 7)
    {
        listBox1.Items.Clear();
        listBox1.Items.Add(“Game over”);
        timer1.Stop();
    }
}

Add a class to keep track of the player stats. If the form is going to display the total number of keys the player pressed, the number that were missed and the number that were correct, and the player’s accuracy, then we’ll need a way to keep track of all that data. Sounds like a job for a new class! Add a class called Stats to your project. It’ll have four int fields called Total, Missed, Correct, and Accuracy, and a method called Update with one bool parameter: true if the player typed a correct letter that was in the ListBox, or false if the player missed one.

Create Stats: Total    Missed    Correct   Accuracy   Update()
class Stats
{
    public int Total = 0;
    public int Missed = 0;
    public int Correct = 0;
    public int Accuracy = 0;
    public void Update(bool correctKey)
    {
       Total++;
       if (!correctKey)
      {
            Missed++;
        }
        else
        {
            Correct++;
        }
        Accuracy = 100 * Correct / (Missed + Correct);
    }
}

Add fields to your form to hold a Stats object and a Random object. You’ll need an instance of your new Stats class to actually store the information, so add a field called stats to store it. And you already saw that you’ll need a field called random—it’ll contain a Random object. Add the two fields to the top of your form:

public partial class Form1 : Form
{
Random random = new Random();
Stats stats = new Stats();
...

Handle the keystrokes.

There’s one last thing your game needs to do: any time the player hits a key, it needs to check if that key is correct (and remove the letter from the ListBox if it is), and update the stats on the StatusStrip. Go back to the form designer and select the form. Then go to the Properties window and click on the lightning bolt button. Scroll to the KeyDown row and double-click on it. This tells the IDE to add a method called Form1_KeyDown() that gets called every time the user presses a key. Here’s the code for the method:

private void Form1_KeyDown(object sender, KeyEventArgs e)
{
    // If the user pressed a key that's in the ListBox, remove it
    // and then make the game a little faster
    if (listBox1.Items.Contains(e.KeyCode))
    {
        listBox1.Items.Remove(e.KeyCode);
        listBox1.Refresh();
        if (timer1.Interval > 400)
        timer1.Interval -= 10;
        if (timer1.Interval > 250)
        timer1.Interval -= 7;
        if (timer1.Interval > 100)
        timer1.Interval -= 2;
        difficultyProgressBar.Value = 800 - timer1.Interval;
        // The user pressed a correct key, so update the Stats object
        // by calling its Update() method with the argument true
        stats.Update(true);
    }
    else
    {
        // The user pressed an incorrect key, so update the Stats object
        // by calling its Update() method with the argument false
        stats.Update(false);
    }
        // Update the labels on the StatusStrip
        correctLabel.Text = "Correct: " + stats.Correct;
        missedLabel.Text = "Missed: " + stats.Missed;
        totalLabel.Text = "Total: " + stats.Total;
        accuracyLabel.Text = "Accuracy: " + stats.Accuracy + "%";
}

Run your game.
Your game’s done! Give it a shot and see how well you do. You may need to adjust the font size of the ListBox to make sure it holds exactly 7 letters, and you can change the difficulty by adjusting the values that
are subtracted from timer1.Interval in the Form1_KeyDown() method.

DIRECT DOWNLOAD CODE FOR THIS PROGRAM HERE

How to convert from Decimal to Binary System in C#

2012-09-08T10:09:00.000+05:30

This code below shows how you can convert a given Decimal number to the Binary number system. This is illustrated by using the Binary Right Shift Operator ">>".

using System;
using System.Text;
using System.Threading.Tasks;

namespace convert_decimal_to_binary

{

class Program

{

static void Main(string[] args)

{

int n, c, k;

Console.WriteLine("Enter an integer in Decimal number system\n");

n = Convert.ToInt32(Console.ReadLine());

Console.WriteLine("\nBinary Equivalent is:\n");

for (c = 31; c >= 0; c--)

{

k = n >> c;

if (Convert.ToBoolean(k & 1))

Console.Write("1");

else

Console.Write("0");

}

Console.ReadKey();

}