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ASP.NET Zip code validation using RegularExpressionValidator Controls

ASP.NET RegularExpressionValidator is very useful to validate zip code fields in form validation. The CompareValidator control belongs to System.Web.UI.WebControls

Syntax

<asp:RegularExpressionValidator ID="regularExp" runat="server" 
ValidationExpression="[0-9]{5}" 
ErrorMessage="Invalid Zip Code."></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.

ASP.NET Zip code validation using RegularExpressionValidator Controls Example

<%@ 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 Zip Code 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 Zip Code Validation Example"></asp:Label>
<table border="0" width="600px" cellpadding="0" cellspacing="0">
<tr><td>
<asp:Label ID="lblZip" runat="server" Font-Bold="True" Font-Size="Small" 
Text="Enter Zip:"></asp:Label>
<asp:TextBox ID="TextBox4" runat="server" Width="177px"></asp:TextBox>
<asp:RegularExpressionValidator ID="RegularExpressionValidator4" runat="server" 
ControlToValidate="TextBox4" ErrorMessage="Not a Valid Zip Code." 
ValidationExpression="[0-9]{5}"></asp:RegularExpressionValidator>
<asp:RequiredFieldValidator ID="RequiredFieldValidator4" runat="server" 
ControlToValidate="TextBox4" ErrorMessage="This 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

RequiredFieldValidator

RegularExpressionValidator

RangValidator

CompareValidator

CustomValidator

ValidationSummary