ASP.NET Email validation using RegularExpressionValidator

The RegularExpressionValidator is used to check whether or not input value matches a certain pattern. The CompareValidator control belongs to System.Web.UI.WebControls

Syntax

<asp:RegularExpressionValidator ID="regularExp" runat="server" 
ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*" 
ErrorMessage="Invalid email Id."></asp:RegularExpressionValidator>

ASP.NET RegularExpressionValidator Control Property

PropertyDescription
ControlToValidateSpecifies control name which needs to be validate.
DisplaySpecifies behavior of the error message.
EnableClientScriptSpecifies whether or not client-side validation is enabled.
EnabledSpecifies whether or not validation control is enabled or not.
ErrorMessageSpecifies error messageto be display in validation summary.
ForeColorSpecifies error message color.
IsValidIndicate if associate control passes validation or not.
SetFocusOnErrorSet focus on associate control if validation fails.
TextSpecifies text to be display if validation fails.
ValidationGroupSpecifies validation group name.
ValidateUpdate the isvalid propery.
ValidateGetValidationPropertyDetermineing validation property of a control, if it exists.
ValidationExpressionSpecifies regular expression that you want to match against input value.

Example Email Validation Using RegularExpressionValidator - Default.aspx

<%@ Page Language="C#" AutoEventWireup="true"  CodeFile="Default.aspx.cs" 
Inherits="_Default" %>
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head runat="server">
    <title>ASP.NET Email Validation Example</title>
</head>
<body>
<form id="Form" runat="server">
<div style="width: 619px">
<asp:Label ID="lblTitle" runat="server" Font-Bold="True" Font-Size="Medium" 
Font-Underline="True" Text="ASP.NET Email Validation Example"></asp:Label>
<table border="0" width="600px" cellpadding="0" cellspacing="0">
<tr><td>
<asp:Label ID="lblEmail" runat="server" Font-Bold="True" Font-Size="Small" 
Text="Enter E-mail address:"></asp:Label>
<asp:TextBox ID="TextBox2" runat="server" Width="177px"></asp:TextBox>
<asp:RegularExpressionValidator ID="RegularExpressionValidator2" runat="server" 
ControlToValidate="TextBox2" ErrorMessage="Not a Valid E-mail address." 
ValidationExpression="\w+([-+.']\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*"></asp:RegularExpressionValidator>
<asp:RequiredFieldValidator ID="RequiredFieldValidator2" runat="server" 
ControlToValidate="TextBox2" ErrorMessage="This is required field, can not be blank."></asp:RequiredFieldValidator>
</td></tr>
<tr><td>
<asp:Button ID="btnSubmit" runat="server" Font-Bold="True" 
Font-Size="Small" Text="Submit" Width="60px" />
</td></tr>
</table>   
</div> 
</form>
</body>
</html>

Above example will produce following output

More ASP.NET RegularExpressionValidator Controls

 
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