RegularExpressionValidator control Example

The RegularExpressionValidator control confirms that the entry matches a pattern defined by a regular expression. This type of validation allows you to check for predictable sequences of characters, such as those in social security numbers, e-mail addresses, telephone numbers, postal codes, and so on.  Some common regular expressions are:

US Zip Codes:  \d{5} 
US Phone Numbers:  \d{3}-\d{3}-\d{4} 
Email address:  \w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*
RegularExpressionValidator uses two key properties to perform its validation: ControlToValidate contains the value to validate, and ValidationExpression contains the regular expression to match.

 ...........Design code for RegularExpressionvalidator control.......
....................................................................
<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" Inherits="_Default" %>





    Untitled Page


    
    
    
          
    
    Email is 
    not vaild
    

    

    
    
    


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...........................cs code..................................
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.Xml.Linq;

public partial class _Default : System.Web.UI.Page 
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }
    protected void Button1_Click(object sender, EventArgs e)
    {
        Response.Write("u have entered valid email");
    }
}
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