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RegexStringValidator Class

Provides validation of a string based on the rules provided by a regular expression.

Namespace:  System.Configuration
Assembly:  System.Configuration (in System.Configuration.dll)

public class RegexStringValidator : ConfigurationValidatorBase

The RegexStringValidator object contains the rules necessary to validate a string object based on a regular expression. The rules are established when an instance of the RegexStringValidator class is created.

The CanValidate method determines whether the object type being validated matches the expected type. The object being validated is passed as a parameter of the Validate method.

The following code example demonstrates how to use the RegexStringValidator type.

using System;
using System.Configuration;

namespace Microsoft.Samples.AspNet.Validators
{
  class UsingRegexStringValidator
  {
    static void Main(string[] args)
    {
      // Display title.
      Console.WriteLine("ASP.NET Validators");
      Console.WriteLine();

      // Create RegexString and Validator.
      string testString = "someone@example.com";
      string regexString = 
       @"^[a-zA-Z\.\-_]+@([a-zA-Z\.\-_]+\.)+[a-zA-Z]{2,4}$";
      RegexStringValidator myRegexValidator = 
       new RegexStringValidator(regexString);

      // Determine if the object to validate can be validated.
      Console.WriteLine("CanValidate: {0}",
        myRegexValidator.CanValidate(testString.GetType()));

      try
      {
        // Attempt validation.
        myRegexValidator.Validate(testString);
        Console.WriteLine("Validated.");
      }
      catch (ArgumentException e)
      {
        // Validation failed.
        Console.WriteLine("Error: {0}", e.Message.ToString());
      }

      // Display and wait
      Console.ReadLine();
    }
  }
}

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0

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