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answers:

1

when i search for open source for domain checker, i got this reference http://www.codeproject.com/KB/aspnet/DataScraping.aspx actually it is in vb.net i convert into c# code and paste the code in my web page i sending total source and code

source code

<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
    <title>Untitled Page</title>
</head>
<body MS_POSITIONING="GridLayout">
        <form id="Form1" method="post" runat="server">
        <TABLE id="Table1" cellSpacing="0" cellPadding="0" width="358" border="0">
            <TR>
            <TD>
                <asp:Label id="Label2" Runat="server">www.</asp:Label>
                <asp:TextBox id="txtDomain" Runat="server">
                Check Domain</asp:TextBox></TD>
            <TD>
                <asp:Button id="btnQuery" Text="Check Domain" Runat="server" OnClick="btnQuery_Click1">
                </asp:Button></TD>
        </TR>
        <TR>
            <TD>
                <asp:Label id="txtResult" Runat="server"></asp:Label></TD>
            <TD></TD>
        </TR>
        </TABLE>
        </form>
    </body>

</html>

C# Code

//code


using System;
using System.Data;
using System.Configuration;
using System.Collections;
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.Net.Sockets;
using System.Text;
using System.IO;

using System.Net;
using System.Text.RegularExpressions;

public partial class _Default : System.Web.UI.Page
{
    //protected System.Web.UI.WebControls.Label Label1;
    //protected System.Web.UI.WebControls.Button btnQuery;
    //protected System.Web.UI.WebControls.Label txtResult;
    //protected System.Web.UI.WebControls.Label Label2;
    //protected System.Web.UI.WebControls.TextBox txtDomain;

    protected void Page_Load(object sender, EventArgs e)
    {
        txtDomain.Attributes.Add("onclick", "this.value='';");
    }

    private void btnQuery_Click(System.Object sender, System.EventArgs e)
    {
        // Stores the bufData extracted from the webclient 

        string firstLevelbufData = null;
        try
        {
            // similarly we can select any server address for bufData mining

            string strURL = "http://www.directnic.com/whois/index.php?query=" + txtDomain.Text;
            WebClient web = new WebClient();
            // byte array to store the extracted bufData by webclient

            byte[] bufData = null;
            bufData = web.DownloadData(strURL);
            // got the bufData now convert it into string form

            firstLevelbufData = Encoding.Default.GetString(bufData);
        }
        catch (System.Net.WebException ex)
        {
            // this exception will be fired when the host name

            // is not resolved or any other connection problem

            txtResult.Text = ex.Message;
            return;
        }
        try
        {
            // first and last are the regular expression string

            // for extraction bufData witnin two tags

            // you can change according to your requirement

            string first = null;
            string last = null;

            first = "<p class= " + Strings.Chr(34) + "text12" + Strings.Chr(34) + ">";
             last = "</p>";
             Regex RE = new Regex(first + "(?<MYDATA>.*?(?=" + last + "))", RegexOptions.IgnoreCase | RegexOptions.Singleline);
             // try to extract the bufData within the first and last tag

            Match m = RE.Match(firstLevelbufData);
            // got the result

             txtResult.Text = m.Groups("MYDATA").Value + "";
             // check if no information abour that domain is available

             if (txtResult.Text.Length < 10) txtResult.Text = "Information about this domain is not available !!";
         }
          catch (Exception e3)
          {
             txtResult.Text = "Sorry the whois information" + " is currently not available !!";
          }
    }

}

but i am getting error at line 70 "(first = "";)" and at page 78 help be if you want the original vb code this is the reference check out

http://www.codeproject.com/KB/aspnet/DataScraping.aspx

+1  A: 
using System.Net.Sockets;
using System.Text;
using System.IO;
using System.Collections;
using System.Net;
using System.Text.RegularExpressions;


public partial class WhoIsC : System.Web.UI.Page
{

    #region " Web Form Designer Generated Code "

    //This call is required by the Web Form Designer.
    [System.Diagnostics.DebuggerStepThrough()]
    private void InitializeComponent()
    {

    }

    protected void  // ERROR: Handles clauses are not supported in C#
Page_Init(System.Object sender, System.EventArgs e)
    {
        //CODEGEN: This method call is required by the Web Form Designer
        //Do not modify it using the code editor.
        InitializeComponent();
    }

    #endregion

    private void  // ERROR: Handles clauses are not supported in C#
Page_Load(System.Object sender, System.EventArgs e)
    {
        // Adds the java script code for clearing  the existing text from the text box when user wants to
        // enter a new domain name
        txtDomain.Attributes.Add("onclick", "this.value='';");
    }

    public  void  // ERROR: Handles clauses are not supported in C#
btnQuery_Click(System.Object sender, System.EventArgs e)
    {
        string firstLevelbufData = null;
        // Stores the bufData extracted from the webclient 
        try
        {
            // similarly we can select any server address for bufData mining
            string strURL = "http://www.directnic.com/whois/index.php?query=" + txtDomain.Text;
            WebClient web = new WebClient();
            // byte array to store the extracted bufData by webclient
            byte[] bufData = null;
            bufData = web.DownloadData(strURL);
            // got the bufData now convert it into string form
            firstLevelbufData = Encoding.Default.GetString(bufData);
        }
        catch (System.Net.WebException ex)
        {
            // this exception will be fired when the host name is not resolved or any other connection problem
            txtResult.Text = ex.Message.ToString();
            return;
        }
        try
        {
            // first and last are the regular expression string for extraction bufData witnin two tags
            // you can change according to your requirement
            string first = null;
            string last = null;
            // chr(34) is used for (") symbol
            first = "<p class=\"text12\">";
            last = "</p>";

            Regex RE = new Regex(first + "(?<MYDATA>.*?(?=" + last + "))", RegexOptions.IgnoreCase | RegexOptions.Singleline);
            // try to extract the bufData  within the first and last tag
            Match m = RE.Match(firstLevelbufData);
            // got the result
            txtResult.Text = m.Groups["MYDATA"].Value + "<br>";
            // check if no information abour that domain is available
            if (txtResult.Text.Length < 10) txtResult.Text = "Information about this domain is not available !!";
        }
        catch (System.Net.WebException ex)
        {
            txtResult.Text = "Sorry the whois information is currently not available !!";
        }
    }

}
Ya it is working fine thank u very much Mr.Surajitkhamrai
Surya sasidhar
hi Mr.surjitkhamrai you r code is working fine but it is not getting the details of the domains like '.co','.in' domains it is giving " Sorry the information is currently not available !! ".i need the domain information which is in .co,.in domain names like 'axisbank.co.in' it is not giving information please help me
Surya sasidhar