Taurus Code Spot

Textbox Formating

2011-03-22T00:49:00.000-07:00

A few examples at what can be achieved with CSS and form text box's

Basic Text Box ( No CSS)

Background Color

background-color : #A0CAFC;

border: 1px solid #008000;

width: 230px; 

Border Color / Style

border: 2px dashed #D1C7AC;

width: 230px; 

Background Image

background-image: url(images/bg.png); 

border: 1px solid #6297BC; 

width: 230px; 

Larger Side Border

width: 230px; 

border: 1px solid #3366FF; 

border-left: 4px solid #3366FF; 

Double Border

border: 3px double #CCCCCC;

width: 230px; 

Image in Text Box

background:#FFFFFF url(images/search.png) no-repeat 4px 4px; 

padding:4px 4px 4px 22px; 

border:1px solid #CCCCCC; 

width:230px; 

height:18px; 

HTML Anchor Bookmark Tag Links

2011-03-10T00:00:00.000-08:00

HTML anchor < a > tag is also very useful for creating bookmark links.
HTML bookmark tag links help in linking the different parts of a single HTML document. HTML bookmark tag link navigates the web page to the targeted location of same or different web page. name attribute of HTML anchor <a> tag provides the feature of bookmark links. For example if there is an anchor tag with name="top":

<a name="top">Title Text here</a>

Above HTML link works as a bookmark link. You can navigate to this bookmark by using href="#top" in another HTML anchor <a> tag link:

Above HTML bookmark tag link code works within the single web page. If you want to open the bookmark of another web page then you have to specify the page name also. For example page2.html contains the HTML anchor tag with name="top", then you can open the target bookmark link as following:

HTML Bookmark link tags are very beneficial for the long pages like FAQs of web sites. Top section of web page displays the frequently asked questions linked using HTML bookmark tag to their answers on the same page.

You can also use two way bookmark links in HTML web page. For example:

<a href="#bottom" name="top">go to bottom</a>

Use above link at the top of your web page.

<a href="#top" name="bottom">go to top</a>

Use above link at the bottom of your web page. Both links will work as bookmark links to each other.

Add to favorites/Bookmark JavaScript Code

2011-03-09T23:03:00.000-08:00

Add to favorites/Bookmark JavaScript Code.

Adding a bookmark to your Web site helps assure that visitors who like your web site and wish to return can easily find it once again.
Adding a bookmark is easy to do and does not require any in-depth programming knowledge. It’s a simple matter of cutting and pasting a few snippets of HTML and JavaScript code into a web page script and making a few simple changes to customize it for your site.

Place the following in the head section of the Web page.

<head>

</head>

Place the following in your HTML code where you want the bookmark link to appear.

<a href="javascript:bookmark('http://www.mydomainname.com/', 'My Site Name');">Bookmark This Site</a>

What is the difference between include and require in PHP?

2011-02-27T19:36:00.000-08:00

What is the difference between include and require in PHP?

<?php include("Home.php"); ?>

<?php require("Page1.php"); ?>

The two functions are used to insert the content of a file into another PHP file before it is executed by the server. They are identical in every aspect, but they perform error handling in different ways. The include() function generates a warning (which does not halt execution) while the require() function generates a fatal error (which stops execution immediately).

Sri Lanka Road Map

2011-02-22T19:07:00.000-08:00

Networking Introduction

2011-02-22T02:13:00.000-08:00

Learn Networking
(Abstract from Forouzan)

Chapter 1 : Introduction

1-1 DATA COMMUNICATIONS

The term telecommunication means communication at a distance. The word data refers to information presented in whatever form is agreed upon by the parties creating and using the data. Data communications are the exchange of data between two devices via some form of transmission medium such as a wire cable.

Topics discussed in this section: - Components

- Data Representation
- Data Flow

Figure 1.1 Five components of data communication

Figure 1.2 Data flow (simplex, half-duplex, and full-duplex)

1-2 NETWORKS

A network is a set of devices (often referred to as nodes) connected by communication links. A node can be a computer, printer, or any other device capable of sending and/or receiving data generated by other nodes on the network.

Topics discussed in this section: - Components

- Distributed Processing

   - Network Criteria
   - Physical Structures
   - Network Models
   - Categories of Networks
   - Interconnection of Networks: Internetwork

Figure 1.3 Types of connections: point-to-point and multipoint

Figure 1.4 Categories of topology

Figure 1.5 A fully connected mesh topology (five devices)

Figure 1.6 A star topology connecting four stations

Figure 1.7 A bus topology connecting three stations

Figure 1.8 A ring topology connecting six stations

Figure 1.9 A hybrid topology: a star backbone with three bus networks

Figure 1.10 An isolated LAN connecting 12 computers to a hub in a closet

Figure 1.11 WANs: a switched WAN and a point-to-point WAN

Figure 1.12 A heterogeneous network made of four WANs and two LANs

1-3 THE INTERNET

The Internet has revolutionized many aspects of our daily lives. It has affected the way we do business as well as the way we spend our leisure time. The Internet is a communication system that has brought a wealth of information to our fingertips and organized it for our use.

Topics discussed in this section: - A Brief History

-The Internet Today (ISPs)

Figure 1.13 Hierarchical organization of the Internet

1-4 PROTOCOLS AND STANDARDS

In this section, we define two widely used terms: protocols and standards. First, we define protocol, which is synonymous with rule. Then we discuss standards, which are agreed-upon rules.

Topics discussed in this section: - Protocols

-Standards

-Standards Organizations
-Internet Standards

File handling in VB.NET

2011-02-20T22:33:00.000-08:00

You would need to reference the System.IO namespace in your project.

Dim fileLoc As String = "c:\sample1.txt"

Create a Text File

' Create a Text File

Private Sub btnCreate_Click(ByVal sender As Object, ByVal e As EventArgs)

Dim fs As FileStream = Nothing

If (Not File.Exists(fileLoc)) Then

fs = File.Create(fileLoc)

Using fs

End Using

End If

End Sub

Write to a Text File

' Write to a Text File

Private Sub btnWrite_Click(ByVal sender As Object, ByVal e As EventArgs)

If File.Exists(fileLoc) Then

Using sw As StreamWriter = New StreamWriter(fileLoc)

sw.Write("Some sample text for the file")

End Using

End If

End Sub

Read From a Text File

' Read From a Text File

Private Sub btnRead_Click(ByVal sender As Object, ByVal e As EventArgs)

If File.Exists(fileLoc) Then

Using tr As TextReader = New StreamReader(fileLoc)

MessageBox.Show(tr.ReadLine())

End Using

End If

End Sub

Copy a Text File

' Copy a Text File

Private Sub btnCopy_Click(ByVal sender As Object, ByVal e As EventArgs)

Dim fileLocCopy As String = "d:\sample1.txt"

If File.Exists(fileLoc) Then

' If file already exists in destination, delete it.

If File.Exists(fileLocCopy) Then

File.Delete(fileLocCopy)

End If

File.Copy(fileLoc, fileLocCopy)

End If

End Sub

Move a Text File

' Move a Text file

Private Sub btnMove_Click(ByVal sender As Object, ByVal e As EventArgs)

' Create unique file name

Dim fileLocMove As String = "d:\sample1" & System.DateTime.Now.Ticks & ".txt"

If File.Exists(fileLoc) Then

File.Move(fileLoc, fileLocMove)

End If

End Sub

Delete a Text File

' Delete a text file

Private Sub btnDelete_Click(ByVal sender As Object, ByVal e As EventArgs)

If File.Exists(fileLoc) Then

File.Delete(fileLoc)

End If

End Sub

File handling in C#

2011-02-20T22:27:00.000-08:00

You would need to reference the System.IO namespace in your project.

string

Create a Text File

// Create a Text File

private void btnCreate_Click(object sender, EventArgs e)

{

FileStream fs = null;

if (!File.Exists(fileLoc))

{

using (fs = File.Create(fileLoc))

{

}

Write to a Text File

// Write to a Text File

private void btnWrite_Click(object sender, EventArgs e)

{

if (File.Exists(fileLoc))

{

using (StreamWriter sw = new StreamWriter(fileLoc))

{

sw.Write("Some sample text for the file");

}

Read From a Text File

// Read From a Text File

private void btnRead_Click(object sender, EventArgs e)

{

if (File.Exists(fileLoc))

{

using (TextReader tr = new StreamReader(fileLoc))

{

MessageBox.Show(tr.ReadLine());

}

Copy a Text File

// Copy a Text File

private void btnCopy_Click(object sender, EventArgs e)

{

string fileLocCopy = @"d:\sample1.txt";

if (File.Exists(fileLoc))

{

// If file already exists in destination, delete it.

if (File.Exists(fileLocCopy))

File.Delete(fileLocCopy);

File.Copy(fileLoc, fileLocCopy);

}

Move a Text File

// Move a Text file

private void btnMove_Click(object sender, EventArgs e)

{

// Create unique file name

string fileLocMove = @"d:\sample1" + System.DateTime.Now.Ticks + .txt";

if (File.Exists(fileLoc))

{

File.Move(fileLoc, fileLocMove);

}

Delete a Text File

// Delete a text file

private void btnDelete_Click(object sender, EventArgs e)

{

if (File.Exists(fileLoc))

{

File.Delete(fileLoc);

}

fileLoc = @"c:\sample1.txt";

Checked List Box

2011-02-17T21:31:00.000-08:00

Checked List Box

Checked and selected item count

using System;
using System.Drawing;
using System.Windows.Forms;
using System.Data;
using System.Data.SqlClient;
public class CheckedListBoxes : Form
{
  CheckedListBox clb;
  Button btnToggle;
  Button btnClear;
  String str;
  public CheckedListBoxes()
  {
    Size = new Size(300,400);
    this.Load += new EventHandler(this_Load);
    clb = new CheckedListBox();
    clb.Parent = this;
    clb.Location = new Point(10,10);
    clb.Size = new Size(ClientSize.Width - 20, Height - 240);
    clb.Anchor = AnchorStyles.Top | AnchorStyles.Left | AnchorStyles.Right | AnchorStyles.Bottom;
    clb.BorderStyle = BorderStyle.Fixed3D;
    clb.MultiColumn = true;
    clb.ScrollAlwaysVisible = true;
    clb.ThreeDCheckBoxes = true;
    clb.CheckOnClick = true;
    clb.ItemCheck += new ItemCheckEventHandler(clb_ItemCheck);
    //  Toggle Indeterminate Button
    btnToggle = new Button();
    btnToggle.Parent = this;
    btnToggle.Text = "Toggle Indeterminate";
    btnToggle.Size = new Size((int)(Font.Height * .75) * btnToggle.Text.Length, Font.Height + 10);
    btnToggle.Location = new Point( clb.Left, clb.Bottom + 10);
    btnToggle.Anchor = AnchorStyles.Left | AnchorStyles.Bottom;
    btnToggle.Click += new System.EventHandler(btnToggle_Click);
    //  Clear Button
    btnClear = new Button();
    btnClear.Parent = this;
    btnClear.Text = "Clear All";
    btnClear.Size = new Size((int)(Font.Height * .75) * btnClear.Text.Length, Font.Height + 10);
    btnClear.Location = new Point(btnToggle.Left, btnToggle.Bottom + 10);
    btnClear.Anchor = AnchorStyles.Left | AnchorStyles.Bottom;
    btnClear.Click += new System.EventHandler(btnClear_Click);
    clb.Items.Add("12345");
      clb.Items.Add("67890");
      clb.Items.Add("7890");
      clb.Items.Add("890");
  }
  static void Main()
  {
    Application.Run(new CheckedListBoxes());
  }
  private void btnToggle_Click(object sender, EventArgs e)
  {
    for (int i = 0; i <= (clb.Items.Count - 1); i++)
    {
      if (clb.GetItemCheckState(i) == CheckState.Checked)
      {
        clb.SetItemCheckState(i, CheckState.Indeterminate);
      }
      else if (clb.GetItemCheckState(i) == CheckState.Indeterminate)
      {
        clb.SetItemCheckState(i, CheckState.Checked);
      }
    }
  }

  private void btnClear_Click(object sender, EventArgs e)
  {
    clb.ClearSelected();
    for (int i = 0; i <= (clb.Items.Count - 1); i++)
    {
      clb.SetItemChecked(i, false);
    }
  }

  private void clb_ItemCheck(object sender, ItemCheckEventArgs e)
  {
    Console.WriteLine("Current Item:" + clb.GetItemText(clb.Items[e.Index]));
    Console.WriteLine("Current Index:" + e.Index.ToString() );
    Console.WriteLine("Current Value:" + e.CurrentValue.ToString() );
    Console.WriteLine("New Value:" + e.NewValue.ToString() );
  }

  private void clb_SelectedIndexChanged(object sender, EventArgs e)
  {
    Console.WriteLine("Selected Items:" + clb.SelectedItems.Count.ToString() );
    Console.WriteLine("Checked Items:" + clb.CheckedItems.Count.ToString() );
  }

  private void this_Load(object sender, EventArgs e)
  {
    clb.SelectedIndexChanged += new EventHandler(clb_SelectedIndexChanged);
  }
}

ASCII Characters

2011-02-15T02:51:00.000-08:00

ASCII Characters

Char	Dec	Oct	Hex
(nul)	0	0	0x00
(soh)	1	1	0x01
(stx)	2	2	0x02
(etx)	3	3	0x03
(eot)	4	4	0x04
(enq)	5	5	0x05
(ack)	6	6	0x06
(bel)	7	7	0x07
(bs)	8	10	0x08
(ht)	9	11	0x09
(nl)	10	12	0x0a
(vt)	11	13	0x0b
(np)	12	14	0x0c
(cr)	13	15	0x0d
(so)	14	16	0x0e
(si)	15	17	0x0f
(dle)	16	20	0x10
(dc1)	17	21	0x11
(dc2)	18	22	0x12
(dc3)	19	23	0x13
(dc4)	20	24	0x14
(nak)	21	25	0x15
(syn)	22	26	0x16
(etb)	23	27	0x17
(can)	24	30	0x18
(em)	25	31	0x19
(sub)	26	32	0x1a
(esc)	27	33	0x1b
(fs)	28	34	0x1c
(gs)	29	35	0x1d
(rs)	30	36	0x1e
(us)	31	37	0x1f
(sp)	32	40	0x20
!	33	41	0x21
"	34	42	0x22
#	35	43	0x23
$	36	44	0x24
%	37	45	0x25
&	38	46	0x26
'	39	47	0x27
(	40	50	0x28
)	41	51	0x29
*	42	52	0x2a
+	43	53	0x2b
,	44	54	0x2c
-	45	55	0x2d
.	46	56	0x2e
/	47	57	0x2f
0	48	60	0x30
1	49	61	0x31
2	50	62	0x32
3	51	63	0x33
4	52	64	0x34
5	53	65	0x35
6	54	66	0x36
7	55	67	0x37
8	56	70	0x38
9	57	71	0x39
:	58	72	0x3a
;	59	73	0x3b
<	60	74	0x3c
=	61	75	0x3d
>	62	76	0x3e
?	63	77	0x3f
@	64	100	0x40
A	65	101	0x41
B	66	102	0x42
C	67	103	0x43
D	68	104	0x44
E	69	105	0x45
F	70	106	0x46
G	71	107	0x47
H	72	110	0x48
I	73	111	0x49
J	74	112	0x4a
K	75	113	0x4b
L	76	114	0x4c
M	77	115	0x4d
N	78	116	0x4e
O	79	117	0x4f
P	80	120	0x50
Q	81	121	0x51
R	82	122	0x52
S	83	123	0x53
T	84	124	0x54
U	85	125	0x55
V	86	126	0x56
W	87	127	0x57
X	88	130	0x58
Y	89	131	0x59
Z	90	132	0x5a
[	91	133	0x5b
\	92	134	0x5c
]	93	135	0x5d
^	94	136	0x5e
_	95	137	0x5f
`	96	140	0x60
a	97	141	0x61
b	98	142	0x62
c	99	143	0x63
d	100	144	0x64
e	101	145	0x65
f	102	146	0x66
g	103	147	0x67
h	104	150	0x68
i	105	151	0x69
j	106	152	0x6a
k	107	153	0x6b
l	108	154	0x6c
m	109	155	0x6d
n	110	156	0x6e
o	111	157	0x6f
p	112	160	0x70
q	113	161	0x71
r	114	162	0x72
s	115	163	0x73
t	116	164	0x74
u	117	165	0x75
v	118	166	0x76
w	119	167	0x77
x	120	170	0x78
y	121	171	0x79
z	122	172	0x7a
{	123	173	0x7b
\|	124	174	0x7c
}	125	175	0x7d
~	126	176	0x7e
(del)	127	177	0x7f

C# - Create Numeric Textbox

2011-02-15T01:47:00.000-08:00

How to create numeric textbox in C#.

  private void txtBlockQty_KeyPress(object sender, KeyPressEventArgs e)
{
           if ((e.KeyChar < '0') || (e.KeyChar > '9')) e.Handled = true;
           if (e.KeyChar=='.') e.Handled = false;
}

How to validate text for numeric value in C#.

# Create a function

private bool isNumeric(string val, System.Globalization.NumberStyles NumberStyle)
{          try
         {
                   Double result;
                  return Double.TryParse(val, NumberStyle, System.Globalization.CultureInfo.CurrentCulture, out result);
          }
          catch (Exception)
          {
                      throw;
                      return false;
          }
}

# Call it like this
if (!isNumeric(txtAnualRent.Text.Trim(), System.Globalization.NumberStyles.Currency))
{
          MessageBox.Show("Enter valid Anual Rent !!", "Errer !", MessageBoxButtons.OK, MessageBoxIcon.Hand);
          validation = false;
}

2011-02-15T00:25:00.000-08:00

Wellcome.. to My Code Spot !

Programming Tips...

Begin- 2011-02-15