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Validate IP Address

Posted By:Deepika Haridas       Posted Date: September 22, 2009    Points: 10    Category: Validations    URL: http://www.dotnetspark.com  
 

An example of validating an IP address


using System.Text.RegularExpressions;

public class IPAddressTextBox: RegExTextBox
{
public IPAddressTextBox()
{
InitializeComponent();
this.ValidationExpression = @"^((25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])\.){3}(25[0-5]|2[0-4][0-9]|1[0-9][0-9]|[1-9][0-9]|[0-9])$";
this.ErrorMessage = "The IP address must be in the form of 111.111.111.111";
}

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