LongValidator Class

Note: This class is new in the .NET Framework version 2.0.

Provides validation of an Int64.

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

public class LongValidator : ConfigurationValidatorBase
public class LongValidator extends ConfigurationValidatorBase
public class LongValidator extends ConfigurationValidatorBase

The LongValidator is used to ensure a long meets specific criteria. The criteria for validation is established when the LongValidator is instantiated. There are four constructor overloads for the LongValidator. The LongValidator constructor verifies the minimum acceptable length of the 64-bit signed integer being validated. The LongValidator constructor ensures that the long being validated adheres to both a minimum and a maximum length. The LongValidator constructor checks both the minimum and maximum Int64 values, as well as whether the validation range is exclusive. The LongValidator constructor checks the previous three parameters and also checks whether the Int64 is equal to a specific resolution value.

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 LongValidator type.

using System;
using System.Configuration;

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

      // Create Long and Validator.
      Int64 testLong =    17592186044416;
      Int64 minLongVal =  1099511627776;
      Int64 maxLongVal =  281474976710656;
      LongValidator myLongValidator = 
       new LongValidator(minLongVal, maxLongVal, false);

      // Determine if the object to validate can be validated.
      Console.WriteLine("CanValidate: {0",

        // Attempt validation.
      catch (ArgumentException e)
        // Validation failed.
        Console.WriteLine("Error: {0", e.Message.ToString());

      // Display and wait

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

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

.NET Framework

Supported in: 2.0

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