ASP.NET | C# |PHP|XML|MVC|SQL|MYSQL|Tutorials

LDAP authentication using JAVA

2013-11-30T09:45:00.005-08:00

package eclipsepackage;

import javax.naming.Context;
import javax.naming.InitialContext;
import javax.naming.NamingException;
import javax.naming.

NamingEnumeration;
import javax.naming.NameAlreadyBoundException;
import javax.naming.directory.*;

import java.util.*;

public class test {

    final static String ldapServerName = "LDAP://127.0.0.1:389/DC=martinkabraham,DC=com";
    final static String dc1="martinkabraham";
     final static String rootdn = "OU=Martin";
     final static String rootpass = "password";
     final static String rootContext = "OU=Martin";
     final static String username="martin.abraham";

    public static void main(String[] args) {
        // TODO Auto-generated method stub

        Properties env = new Properties();

        env.put( Context.INITIAL_CONTEXT_FACTORY,
                 "com.sun.jndi.ldap.LdapCtxFactory" );
        env.put(Context.REFERRAL, "follow");
        env.put( Context.PROVIDER_URL, ldapServerName);
        env.put(Context.SECURITY_AUTHENTICATION, "simple");
        env.put( Context.SECURITY_PRINCIPAL, new String(dc1 + "\\"+username) );
        env.put( Context.SECURITY_CREDENTIALS, rootpass );

        DirContext ctx = null;
        NamingEnumeration results = null;
        try {
            ctx = new InitialDirContext(env);
            SearchControls controls = new SearchControls();
            controls.setSearchScope(SearchControls.SUBTREE_SCOPE);
            results = ctx.search("", "(sAMAccountName="+username+")", controls);
            while (results.hasMore()) {
                SearchResult searchResult = (SearchResult) results.next();
                Attributes attributes = searchResult.getAttributes();

                if(attributes.get("cn")!=null)
                {
                    // login here .... user exist
                  System.out.println("SUCCESS");
                }
                else
                {
                    System.out.println("F");

                }
            }
        } catch (Throwable e) {
            e.printStackTrace();
        } finally {
            if (results != null) {
                try {
                    results.close();
                } catch (Exception e) {
                }
            }
            if (ctx != null) {
                try {
                    ctx.close();
                } catch (Exception e) {
                }
            }
        }


    }

}

Android Browser File Down Load

2013-11-24T21:25:00.002-08:00

Android browser will not download file in button Post events. In post events the file will be some .htm garbage file. to over come this do as below.

In download button click

protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
    {
        Response.Redirect("download-file.aspx");
    }

and on download-file.aspx file do as below

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class mobile_download_file : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        string filename = "usermanual.pdf";
        Response.ContentType = "application/octet-stream";
        Response.AppendHeader("Content-Disposition", "attachment; filename=" + "" + filename + "");
        Response.Write(Server.MapPath(Request.ApplicationPath) + "\\" + filename);
        Response.TransmitFile(Server.MapPath(Request.ApplicationPath) + "\\" + filename);
        Response.End();
    }
}

OAuth

2010-12-11T04:26:00.000-08:00

OAuth an open protocol to allow secure API authorization in a simple and standard method from desktop and web applications.

Almost all Social networks provide a method to share there data with data with others by the method of OAuth. By this Authorization for example if i am integrating Twitter with my website the user dosen't need to provide the uname/password of him in my site but they can authenticate in twitter itself and he can give allow permission so that he can view his Tweets and post of others and can Tweet from mysite to Twitter...
This is a good technology as OpenID. very very Secure.

I have implemented it already for Picassa,Twitter,Facebook and Youtube. for example u can check this site in development stage.

http://208.109.209.105:1081/phaseoflife/

Prevent Pages from going to history on Back Button click using Javascript

2010-08-02T01:12:00.000-07:00

Hi we can prevent the pages ability to go back by using java script. Suppose From Default.aspx page we go to Default2.aspx and we dont want to go to default.aspx from default2.aspx. for this we can place make place javascript on default.aspx.

Place this between head tags of Default.aspx.
<script type = "text/javascript" >
function disableBackButton()
{
window.history.forward(1);
}
setTimeout("disableBackButton()", 0);

</script>

call this script in body load and unload events so that it will work on all browsers.

<body onload="disableBackButton();" onunload="disableBackButton();">

ViewState and Hacking ViewState Data In ASP.NET Beware!!!!!!!!

2010-07-31T02:10:00.000-07:00

Asp.net View State help us to retrieve data after Postbacks. But remember this data is generally not safe as it is simply serialized and stored in the rendered HTML.

Suppose this is the Server Code

protected void Page_Load(object sender, EventArgs e)
    {
        ViewState["password"] = "mypassword";
    }

Its Rendered HTMLis like this

U can Decode View State data Simply like this

   string data = "/wEPDwUKMTQ2OTkzNDMyMQ8WAh4IcGFzc3dvcmQFCm15cGFzc3dvcmRkZBFNlyb3T/zu6sd7uJs/TN9V0e5z";
        string password = System.Text.Encoding.ASCII.GetString(Convert.FromBase64String(data));
        Response.Write(password);



So the Result will be Like This

? 1469934321 password mypassworddd M?&?O????{???L?U??

See the data Decode... So Beware Dont Store Important data in ViewState as the it can be easily reteived from the HTML.. You can enable automatic
hash codes to prevent view state tampering, and you can even encrypt view state to prevent it from being decoded

URL Mapping in ASP.NET

2010-07-28T12:49:00.000-07:00

In an ideal world, we'd design our Web applications perfectly the first time. Pages would be created in the proper folder and stay there. For that matter, end users would never care about the URLs of the pages in our Web applications, so we could put pages anywhere we wanted without worrying about it.

Url mapping is done in the system.web section of the web.config file.

an Example of url mapping is described

What does this mean?
it simply means if we write a code Response.Redirect("Default2.aspx")in Default.aspx page, the URL reads as Default2.aspx but the browser displays the page Default.aspx since the Default2.aspx page is mapped to Default.aspx.

This are the basics of url Rewriting and Routing procedures done in MVC architecture. This all helps in SEO a lot...
We can enforce the folder structure using URL mapping...

Get Number of mysql connections if Connection are not cached

2010-07-28T03:02:00.000-07:00

string Qry=" FLUSH STATUS ;SHOW GLOBAL STATUS LIKE '%Max_used_connections%' ";
MysqlDataAdapter ad =new MysqlDataAdapter(Qry);
so fill that to dataset and u will get that.

If connection is cached u need to do work on thread cache and work on that.

Send Email in Asp.net .. System.Web.Mail

2010-07-28T01:14:00.000-07:00

We can easily sent emails from asp.net using Mail Message which comes under name-space System.Web.Mail.

The Code is as Follows...

using System.Web.Mail;

MailMessage messa = new MailMessage();
messa.From = "martinkabraham.gmail.com";
messa.To = "martinkabraham@gmail.com";
messa.Subject = "Test Mail";

messa.BodyFormat = MailFormat.Html;
messa.Body = "Hai all";

SmtpMail.SmtpServer = "";
SmtpMail.Send(messa);

If Smtp throws exception then replace SmtpMail.SmtpServer = ""; to SmtpMail.SmtpServer = "localhost";

C# code Protection Using .NET REACTOR

2010-07-26T03:02:00.000-07:00

The assembly (.exe, .dll) etc we build using .Net Framework can be decombiled using visual studio command Promt. ildasm is the commad that we can use to open an assembly as Resource hacker is doing.

C:\Program Files\Microsoft Visual Studio 9.0\VC>ildasm

This will Pull up ILDASM window for us.

This is the General Structure of a .net Assembly

So select the exe file from the File menu in that. We can see the decombiled file as shown

Thus our Function and code Assembly are visible to Others. To over come this issue we combile that code using .NET Reactor.

.NET Reactor is a powerful code protection and software licensing system for software written for the .NET Framework, and supports all languages that generate. .NET Reactor prevents decompilation by a variety of methods which convert your .NET assemblies into processes which no existing tool can decompile ( and which are also very likely to prevent decompilation by any future tool). .NET Reactor builds a native code wall between potential hackers and your .NET assemblies by producing a file which cannot be understood directly as CIL. Because the CIL in your assembly is emitted intact only at run time or design time (in a form in which the source is completely inaccessible), no tool is capable of decompiling .NET Reactor protected assemblies. The native code wall created by .NET Reactor between the hacker and your source includes industry leading NecroBit technology, which is exclusive to .NET Reactor. .NET Reactor's protection has never been broken since the first release in 2004. These technologies make reconstruction of your source code more difficult by so many orders of magnitude that NecroBit is by far the most effective protection you can use for .NET assemblies. In addition to industry leading intellectual property protection, .NET Reactor provides powerful options for securing you revenue stream by enforcing licensing terms with a rich variety of trialversion and full version locks. .NET Reactor offers you an easy and reliable way to: - Secure your .NET applications and .NET libraries - Replace CIL code with native code - Perform additional layers of protection, including obfuscation - Merge assemblies, and - Protect your revenue by enforcing trial version restrictions and full version licensing terms.

Xml Creation and Reading that to DataSet

2010-07-24T11:45:00.000-07:00

Creating XML and Reading that is very important when we come to Web-service, Serialization etc
Here i just give the basics of creating and reading xml.

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.IO;
using System.Xml;

//Creating Xml Node..........................

            XmlDocument Xdoc = new XmlDocument();
            XmlElement Xelm1 = Xdoc.CreateElement("MainNode");
            Xdoc.AppendChild(Xelm1);

            //Appending text node to the subnode........

                XmlElement Xelm2 = Xdoc.CreateElement("Number");
                XmlText xmlText = Xdoc.CreateTextNode("data");
                Xelm2.AppendChild(xmlText);

            //Appending SubNode to Main Node....
                Xelm1.AppendChild(Xelm2);


         //Writing Xml ........................
            StringWriter sw = new StringWriter();
            XmlTextWriter xw = new XmlTextWriter(sw);
            xw.Formatting = Formatting.Indented;
            Xdoc.WriteTo(xw);
            string xmlstr =""+ sw.ToString()+"";

            //Loading Data to DataSet From XML................

            DataSet ds = new DataSet();
            foreach (DataTable dt in ds.Tables)
                dt.BeginLoadData();
            ds.ReadXml(new StringReader(xmlstr));
           foreach (DataTable dt in ds.Tables)
                dt.EndLoadData();

            //Setting Datasource to datagridview..................

            dataGridView1.DataSource = ds.Tables["MainNode"];

ASP.NET Viewstate MAC failed Error ... What is this?

2010-07-23T12:44:00.000-07:00

“Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.”

in your ASP.NET application while clicking a button?

The reason for this error is ASP.NET renders some hidden fields, such as the __EVENTVALIDATION field near the bottom of the form, immediately before the closing tag. If event validation is enabled and a user clicks on a button before the page is rendered completely, then __EVENTVALIDATION field is not included in the data that is being posted. Therefore, the .NET Framework treats this postback as invalid and brings up this error.

To resolve this error, a lot of developers set the page property "EnableViewStateMac" to false. Although this may resolve the error in some cases, this is not the preferred way.

To resolve this error, if you are using .NET 3.5, upgrade to .NET 3.5 SP1. If you are using .NET 2.0, then upgrade to .NET 2.0 SP2.

By default, in ASP.NET 3.5 SP1, all system-generated hidden fields are rendered at the top of the page. This makes sure that the information in these fields is sent to the server even if a postback is performed, before the page has finished loading.

If you want to render system-generated fields at the bottom of the page, set the RenderAllHiddenFieldsAtTopOfForm property to False.

CAPTCHA generation in asp.net c#

2010-07-19T03:30:00.000-07:00

CAPTCHA stands for "completely automated public Turing test to tell computers and humans apart." What it means is, a program that can tell humans from machines using some type of generated test. A test most people can easily pass but a computer program cannot. Mainly intended to reduce spam on our websites.

Captcha generation here descibed below contain the following sections

1) A handler file (ashx) to produce captcha

2)Validation of captcha.

Handler file Look like this.

captcha.ashx..................................................................

<%@ WebHandler Language="C#" Class="captcha" %>

using System;
using System.Web;
using System.Web.SessionState;
using System.Drawing;
using System.Drawing.Imaging;
using System.Drawing.Drawing2D;
using System.IO;

public class captcha : IHttpHandler {

    public void ProcessRequest (HttpContext context) {

        string text = context.Request["captcha"].ToString();
        Bitmap bmpimg = new Bitmap(100, 50);
        Graphics g = Graphics.FromImage(bmpimg);
        g.InterpolationMode = InterpolationMode.HighQualityBicubic;
        g.FillRectangle(Brushes.Black, 0, 0, 100, 10);
        g.DrawString(text, new Font("Verdana", 18), new SolidBrush(Color.White), 0, 0);
        MemoryStream ms = new MemoryStream();
        bmpimg.Save(ms, ImageFormat.Jpeg);
        byte[] data = ms.GetBuffer();
        bmpimg.Dispose();
        ms.Close();
        context.Response.BinaryWrite(data);
        context.Response.Flush();
        context.Response.End();

    }

    public bool IsReusable {
        get {
            return false;
        }
    }

}

Next the aspx page ...

and Finally the CS page

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.IO;
using System.Text;

public partial class _Default : System.Web.UI.Page
{
   static string rndstrig;

    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            generate();
        }
    }

    private void generate()
    {
        Random rnd = new Random();
        rndstrig = rnd.Next(1000, 9999).ToString();
        imgcapthca.ImageUrl = "~/captcha.ashx?captcha=" + rndstrig;
    }

    protected void Button1_Click(object sender, EventArgs e)
    {

    }
    protected void CustomValidator1_ServerValidate(object source, ServerValidateEventArgs args)
    {
        if (txtcaptchacheck.Text == rndstrig)
        {
            args.IsValid = true;
        }
        else
        {
            args.IsValid = false;
        }
        generate();
    }
}

the O/p will be like this

CSV generator for asp.net c# without writing file in server...

2010-07-18T22:27:00.000-07:00

Last topic (http://martinkabraham.blogspot.com/2010/07/csv-generator-for-aspnet-c.html) we see generating csv by saving that csv file to server folder that need to set folder permissions (chmod(7,7,7)). Now lets see to generate csv without writing that to server.
Encoding.ASCII.GetBytes(CompleteCsv) will givbe the bye[] for the Respose object to binary write.
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.IO;
using System.Text;

        DataTable dt = new DataTable();
        dt.Columns.Add(new DataColumn("SlNo", typeof(string)));
        dt.Columns.Add(new DataColumn("Name", typeof(string)));

        DataRow dr;

        for (int i = 0; i < 5; i++)
        {
            dr = dt.NewRow();
            dr[0] = i;
            dr[1] = "Name" + i.ToString();
            dt.Rows.Add(dr);

        }

        string csvdata = "";
        int appflg = 0;
        foreach (DataColumn dc in dt.Columns)
        {
            if (appflg == 1)
            {
                csvdata = csvdata + ",";
            }
            csvdata = csvdata + dc.ColumnName;
            appflg = 1;

        }

        csvdata = csvdata + "\r\n";

        string csvdata_row = "";
        foreach (DataRow drw in dt.Rows)
        {
            csvdata_row = csvdata_row + drw[0] + "," + drw[1];
            csvdata_row = csvdata_row + "\r\n";

        }

        string CompleteCsv = csvdata + csvdata_row;

        Response.AppendHeader("content-disposition", "attachment;filename=00123.csv");
        Response.ContentType = "application/octect-stream";
        Response.BinaryWrite(Encoding.ASCII.GetBytes(CompleteCsv));
        Response.Flush();
        Response.End();

ASP .net PAGE CACHING and Substitution Control

2010-07-17T14:53:00.000-07:00

Here we can have some basics about asp.net page caching. Think about a situations in which we are paging lakhs of data in this case response each times goes to server and if the users are large in number that site goes to stuck definitely. It is worth to note that every post backed pages are in server memory and which are eating server memory. To over come this we use cache in asp.net pages.

Cache can be on same server or on another server. Cache have a duration and server will handle the post back only after the cache is expired. Till the page is in cache post back are not handled by the server.

Let us see the situation with and with out cache..
suppose that we have a button and a label in an aspx page.

on each button click we will get the Time from server.. This means server is handling the post-back event or request.

protected void Button1_Click(object sender, EventArgs e)
{
Label1.Text = System.DateTime.Now.ToString();
}

Now suppose i am going to put that page in a cache..

for that in aspx source i add the following

<%@ OutputCache Duration="1000" VaryByParam="None"%>

So that that page will be in cache for 1 sec since Duration is 1000ms.(1000ms=1 sec)
so now you press the button frequently you can see that the time in the label is not changing for 1 sec since server is idle in this situation.

so the entire page is cached for 1 sec.

Now suppose we want some dynamic data to be displayed in a cached page. for that we use Substitution control

Drag that control and place it in the form.

public static string GetCurrentDateTime(HttpContext context)
    {
        return DateTime.Now.ToString();
    }

then for substitution control set the method name as the function name have HTTPCOntext response.

            MethodName="GetCurrentDateTime" />

Now on button press u can see that Substitution control time chnages inside it while no change in label.

Thus we can display data in a chached page id data need to be dynamic..

CSV generator for asp.net c#

2010-07-16T22:46:00.000-07:00

The term csv stands for Comma Seperated values, means each value is seperated by simply a comma.
eg:martin,sobin,alex

The importance of csv is that it can open in excel,Open-office etc. so if we want to export some db data to excel .. the coder can export that to csv so the user can best fit that on Excel or Open-office

This code will help you to generate csv from a dynamically created datable....
This example pull download window to download csv file and save that to local machine.

using System;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.HtmlControls;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Data;
using System.IO;

// csv Generator...Martin
DataTable dt = new DataTable();
dt.Columns.Add(new DataColumn("SlNo",typeof(string)));
dt.Columns.Add(new DataColumn("Name", typeof(string)));

DataRow dr;

for (int i = 0; i < 5; i++)
{
dr = dt.NewRow();
dr[0] = i;
dr[1] = "Name" + i.ToString();
dt.Rows.Add(dr);

}

string csvdata="";
int appflg = 0;
foreach (DataColumn dc in dt.Columns)
{
if (appflg == 1)
{
csvdata = csvdata + ",";
}
csvdata =csvdata+dc.ColumnName;
appflg = 1;

}

csvdata = csvdata + "\r\n";

string csvdata_row="";
foreach (DataRow drw in dt.Rows)
{
csvdata_row = csvdata_row + drw[0] + "," + drw[1];
csvdata_row = csvdata_row + "\r\n";

}

string CompleteCsv = csvdata + csvdata_row;
StreamWriter sw = new StreamWriter(Server.MapPath(Request.ApplicationPath)+"\\mycsv.csv");
sw.Write(CompleteCsv);
sw.Close();

FileStream fd = new FileStream(Server.MapPath(Request.ApplicationPath) + "\\mycsv.csv",FileMode.Open);
byte[] data=new byte[(int)fd.Length];
fd.Read(data, 0, (int)fd.Length);
fd.Flush();
fd.Close();

Response.AppendHeader("content-disposition", "attachment;filename=00123.csv");
Response.ContentType = "application/octect-stream";
Response.BinaryWrite(data);
Response.Flush();
Response.End();

Skin Files in Asp.net ( App_Themes) Easily apply style to Server Controls

2010-07-03T01:19:00.000-07:00

To Customize server Controls , ie having different background image,fore-color,bold etc it is hard to go to each control and set its properties or css class. Asp.net provide an easy way to manage this. By use if Skin files we are able to manage that.

Website->AddNewItem->SkinFile

Skin file will be added to the Project.Vs will automatically add that to App_Themes->SkinFiles->skin.skin.
To bring that skin file to our page go to Source view and add

<%@ Page Language="C#" Theme="SkinFile" AutoEventWireup="true" CodeFile="Default.aspx.cs" Inherits="_Default" %> where SkinFile is the name of the skin file you are adding.

Now Lets See the Structure of Skin File

The above Skin is for TextBox... note the Skinid="Browse" so that we can use that ID to get that Particular skin on Textbox

See the aspx page

Now you can see that that particular Skin is applied to text box. Like this can apply any number of Skins to all server controls. We can also write diff SkinId in the same Skin Files.

The Folder Structure is mentioned Below

How to Effectively Validate ASP.NET Page...when Javascript disabled in Browser ( When Validation controls become useless)

2010-06-25T02:16:00.001-07:00

Consider a situation Like this .....
asp:TextBox ID="USERNAME" runat="server" asp:TextBox

asp:RequiredFieldValidator
ID="RequiredFieldValidator1" runat="server"
ErrorMessage="USER NAME CANNOT BE BLANK" ControlToValidate="USERNAME">asp:RequiredFieldValidator

asp:Button ID="submit" runat="server" Text="SUbmit" onclick="submit_Click"

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

protected void submit_Click(object sender, EventArgs e)
{
Response.Write("I am fired.........!!!");

}

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
Since we have the required field validator over there "submit_Click " works only when it is not blank...

Try to disable JavaScript on your Browser and press button. You can see Post back happen also the validator message comes but the code goes to execution by printing "I am fired.........!!!" ... So a hacker can easily destroy your validation my disabling java script in browser...

So my Friends go for this code in Button Click

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

protected void submit_Click(object sender, EventArgs e)
{

if (Page.IsValid)
{
Response.Write("I am fired.........!!!");
}

}

The intelligent .net checks this in Server side. So code will execute only if page.Isvalid=true.....

Thanks for using System.Web.UI

:)

Delete asp.net Listbox item...(Multiple Items) !!

2010-04-26T09:26:00.000-07:00

Suppose ListBox1 be the list box with some items in it we can delete the selected items in the Listbox with the below code..

for Multiple selection, enable the Multiple option of the List box to "Multiple"..

        for (int i = 0; i < ListBox1.Items.Count; i++)
        {
            int myindx = ListBox1.SelectedIndex;
            if (myindx >= 0)
            {
                if (ListBox1.Items[myindx].Selected == true)
                {
                    ListBox1.Items.RemoveAt(myindx);

                }
            }
        }

Asp.net List box to ListBox Transfer....

2010-04-26T01:57:00.001-07:00

The ListBox control enables you to display a list of items to the user that the user can select by clicking. A ListBox control can provide single or multiple selections using the SelectionMode property. This tutorial show you how to choose multi items and move them to the other Listbox.

The ListBox control enables you to display a list of items to the user that the user can select by clicking. A ListBox control can provide single or multiple selections using the SelectionMode property. The ListBox also provides the MultiColumn property to enable the display of items in columns instead of a straight vertical list of items. This allows the control to display more visible items and prevents the need for the user to scroll to an item. This tutorial show you how to move items of ListBox from one to the other.

First, you will need to import the using System.Collections namespace. The System.Collections namespace contains interfaces and classes that define various collections of objects, such as lists, queues, bit arrays, hash tables and dictionaries.

public void AddBtn_Click(Object Src, EventArgs E)
{

if (lstAsset.SelectedIndex>=0)
{

for (int i = 0; i < lstAsset.Items.Count; i++)
{

if (lstAsset.Items[i].Selected)
{

if (!lasset.Contains(lstAsset.Items[i]))
{

lasset.Add(lstAsset.Items[i]);

}

}
for (int i = 0; i < lasset.Count; i++)
{

if (!lstSubordinateAsset.Items.Contains(((ListItem)lasset[i])))
{

lstSubordinateAsset.Items.Add(((ListItem)lasset[i]));

} lstAsset.Items.Remove(((ListItem)lasset[i]));

}

}

public void AddAllBtn_Click(Object Src, EventArgs E)
{

while (lstAsset.Items.Count != 0)
{

for (int i = 0; i < lstAsset.Items.Count; i++)
{

if (!lasset.Contains(lstAsset.Items[i]))
{

lasset.Add(lstAsset.Items[i]);

}

}
for (int i = 0; i < lasset.Count; i++)
{

if (!lstSubordinateAsset.Items.Contains(((ListItem)lasset[i])))
{

lstSubordinateAsset.Items.Add(((ListItem)lasset[i]));

}
lstAsset.Items.Remove(((ListItem)lasset[i]));

}

}

public void RemoveBtn_Click(Object Src, EventArgs E)
{

if (lstSubordinateAsset.SelectedItem != null)
{

for (int i = 0; i < lstSubordinateAsset.Items.Count; i++)
{

if (lstSubordinateAsset.Items[i].Selected)
{

if (!lsubordinate.Contains(lstSubordinateAsset.Items[i]))
{

lsubordinate.Add(lstSubordinateAsset.Items[i]);

}

}
for (int i = 0; i < lsubordinate.Count; i++)
{

if (!lstAsset.Items.Contains(((ListItem)lsubordinate[i])))
{

lstAsset.Items.Add(((ListItem)lsubordinate[i]));

}
lstSubordinateAsset.Items.Remove(((ListItem)lsubordinate[i]));
UpdateList.Add(lsubordinate[i]);

}

}

public void RemoveAllBtn_Click(Object Src, EventArgs E)
{

while (lstSubordinateAsset.Items.Count != 0)
{

for (int i = 0; i < lstSubordinateAsset.Items.Count; i++)
{

if (!lsubordinate.Contains(lstSubordinateAsset.Items[i]))
{

lsubordinate.Add(lstSubordinateAsset.Items[i]);

}

}
for (int i = 0; i < lsubordinate.Count; i++)
{

if (!lstAsset.Items.Contains(((ListItem)lsubordinate[i])))
{

lstAsset.Items.Add(((ListItem)lsubordinate[i]));

}
lstSubordinateAsset.Items.Remove(((ListItem)lsubordinate[i]));
UpdateList.Add(lsubordinate[i]);

}

}

also see this in code project............... thats will also help all
http://www.codeproject.com/KB/aspnet/List_Box_Control.aspx

POP3 (Post Office Protocol) in Asp.net to recieve email

2010-04-22T00:32:00.000-07:00

Hi all .. let me Put Some begginging to read email from gmail using POP3.. all the details of your mail server can be get from gmail settings...
Socket programming enable us in doing this ... lets see that in simple

............. Code Goes Here...........................
...........name spaces to be used........

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.IO;
using System.Net.NetworkInformation;
using System.Net.Security;
using System.Net.Sockets;

and the code in the button Event

try

{

TcpClient tcpclient = new TcpClient(); // create an instance of TcpClient

tcpclient.Connect("pop.gmail.com", 995); // HOST NAME POP SERVER and gmail uses port number 995 for POP get this from gmail setting

System.Net.Security.SslStream sslstream = new SslStream(tcpclient.GetStream()); // This is Secure Stream // opened the connection between client and POP Server

sslstream.AuthenticateAsClient("pop.gmail.com"); // authenticate as client 

//bool flag = sslstream.IsAuthenticated; // check flag 

System.IO.StreamWriter sw = new StreamWriter(sslstream); // Asssigned the writer to stream

System.IO.StreamReader reader = new StreamReader(sslstream); // Assigned reader to stream

sw.WriteLine("USER your_gmail_user_name@gmail.com"); // refer POP rfc command, there very few around 6-9 command

sw.Flush(); // sent to server

sw.WriteLine("PASS your_gmail_password"); 
sw.Flush();

sw.WriteLine("RETR 1"); // this will retrive your first email 

sw.Flush();

sw.WriteLine("Quit "); // close the connection

sw.Flush();

string str = string.Empty; 
string strTemp = string.Empty;

while ((strTemp = reader.ReadLine()) != null) 
{

if (strTemp == ".") // find the . character in line

{

break; 
}

if (strTemp.IndexOf("-ERR") != -1) 
{

break; 
}

str += strTemp;

}

Response.Write(str);

Response.Write("
" + "Congratulation.. ....!!! You read your first gmail email "); 
}

catch (Exception ex) 
{

Response.Write(ex.Message);

}

}

Developing on MONO !! its Great!!!!!!!!!!

2010-04-18T22:53:00.000-07:00

HI all............

Think about the situation in which we are able to run c# code on Mac and Linux Machines..
Its real now.. We can convert our software developed in C# to run on Linux and Mac Machines..
Me started it too.. and the MONO can help us in doing that.. :)

Mono and .NET compile source code into 'assemblies'. Assemblies, which are similar to collections of Java .class files, contain language-independent, platform-independent bytecode called CIL (Common Intermediate Language). Because assemblies are language independent, it doesn't matter what language was used to create them. Assemblies made with C# can mix with assemblies created with VB.NET, Java (using IKVM), or any language that someone has written a CIL compiler for.

But, being platform independent means, of course, that assemblies need to be compiled again into native code before they can run on any particular machine. It's important to distinguish the two compilations involved in Mono applications: from source code to byte code, and from byte code to native machine code. The first compilation is performed by the developer. The second compilation is generally performed just when the program begins executing, on the very computer that will run the application, and for this reason it's called Just-In-Time (JIT) compilation. This second compilation and the execution of the application is performed by a Common Language Runtime (CLR).

Mono also supports Ahead-Of-Time (AOT) compilation. This is a mode that pre-compiled the code, and it is useful to reduce application startup time (by eliminating the JIT startup time) and increasing the code that can be shared across multiple applications.

On Windows and Linux, as well as other operating systems, assemblies are stored in files with the .dll or .exe extension. The only difference between a .dll assembly and a .exe assembly is that a .exe assembly contains a starting point for an application (a Main method), whereas .dll assemblies only are class libraries

Admin is not Admin in WIndows Vista !!

2010-01-05T10:23:00.000-08:00

The directory access and Write permision using code in Vista is in blocked state. so Project working in Xp will do HELL in vista throwing access exceptions.....

to over come this add manifest file from project add new item and precombile it thus Avoid that Vista Hell....
So that we are able to pull the Vista UAC .............

create fullcontrol to a directory for windows machines

2010-01-04T08:32:00.000-08:00

System.Security.Principal.SecurityIdentifier sid = new System.Security.Principal.SecurityIdentifier(System.Security.Principal.WellKnownSidType.WorldSid, null);
System.Security.Principal.NTAccount acct = sid.Translate(typeof(System.Security.Principal.NTAccount)) as System.Security.Principal.NTAccount;
string strEveryoneAccount = acct.ToString();

DirectoryInfo dInfo = new DirectoryInfo(Environment.CurrentDirectory + "\\serverservice");
DirectorySecurity dSecurity = dInfo.GetAccessControl();
dSecurity.AddAccessRule(new FileSystemAccessRule(strEveryoneAccount, FileSystemRights.FullControl, AccessControlType.Allow));

dInfo.SetAccessControl(dSecurity);

AVOID ASP.net SESSION ERROR..(null reference and others...!)

2009-12-13T12:29:00.001-08:00

here goes our session wrapper class.....
public static class SessionHandler
{

private static string _userCountryKey = "UserCountry";

public static string UserCountry
{

get
{

/
if (HttpContext.Current.Session[SessionHandler._userCountryKey] == null)
{

return string.Empty;
}
else
{
return HttpContext.Current.Session[SessionHandler._userCountryKey].ToString();
}

}

set
{
HttpContext.Current.Session[SessionHandler._userCountryKey] = value;
}

}

here we can set and retrive it ....

SessionHandler.UserCountry="INDIA"

retrive using

Response.Write(SessionHandler.UserCountry);

Avoid all null references that are eating us ......

About ME!!

2009-10-04T04:51:00.000-07:00

Me a Software Developer.. From my inside mind i hate this field as this was against my ambition in all means.... But the stringent situation in my life path force me to stick here...

"Networking is a Dream!! CCIE"
LOL