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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 type exposes the following members.

  NameDescription
Public methodRegexStringValidatorInitializes a new instance of the RegexStringValidator class.
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  NameDescription
Public methodCanValidateDetermines whether the type of the object can be validated. (Overrides ConfigurationValidatorBase.CanValidate(Type).)
Public methodEquals(Object)Determines whether the specified object is equal to the current object. (Inherited from Object.)
Protected methodFinalizeAllows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.)
Public methodGetHashCodeServes as the default hash function. (Inherited from Object.)
Public methodGetTypeGets the Type of the current instance. (Inherited from Object.)
Protected methodMemberwiseCloneCreates a shallow copy of the current Object. (Inherited from Object.)
Public methodToStringReturns a string that represents the current object. (Inherited from Object.)
Public methodValidateDetermines whether the value of an object is valid. (Overrides ConfigurationValidatorBase.Validate(Object).)
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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();
    }
  }
}

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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