<%@
Page Language="C#" AutoEventWireup="true"
CodeFile="UpdatePanel.aspx.cs" Inherits="UpdatePanel" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
<title>Untitled Page</title>
</head>
<body>
<form id="form1" runat="server">
<asp:ScriptManager ID="scriptMangerTest" runat="Server">
</asp:ScriptManager>
<asp:UpdatePanel ID="updateTest" runat="Server">
<ContentTemplate>
<div>
<table cellpadding="0" cellspacing="0" width="60%">
<tr>
<td align="right">
<asp:Label ID="lblName" runat="Server" Text="Enter E-mail Id">
</asp:Label>
</td>
<td>
<asp:TextBox ID="txtEmail" runat="Server"></asp:TextBox>
</td>
</tr>
<tr>
<td colspan="2" align="left">
<asp:Button ID="btnCheck" runat="Server" Text="Validate" OnClick="btnCheck_Click" />
</td>
</tr>
</table>
</div>
</ContentTemplate>
</asp:UpdatePanel>
</form>
</body>
</html>
---------------------------------------------------------------------------------
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;
public partial class UpdatePanel : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
}
protected void btnCheck_Click(object sender, EventArgs e)
{
if (!CheckEmail(txtEmail.Text))
{
Guid gMessage = Guid.NewGuid();
string sMessage = "alert('Invalid
E-mail Id ');";
ScriptManager.RegisterStartupScript(updateTest, updateTest.GetType(),
gMessage.ToString(), sMessage, true);
}
}
private bool CheckEmail(string EmailAddress)
{
string strPattern = @"^[a-zA-Z][\w\.-]*[a-zA-Z0-9]@[a-zA-Z0-9][\w\.-]*[a-zA-Z0-9]\.[a-zA-Z][a-zA-Z\.]*[a-zA-Z]$";
if (System.Text.RegularExpressions.Regex.IsMatch(EmailAddress,
strPattern))
{ return true; }
return false;
}
}