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LongValidator Class

Provides validation of an Int64 value.

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

'Declaration
Public Class LongValidator
	Inherits ConfigurationValidatorBase
'Usage
Dim instance As LongValidator

public class LongValidator extends ConfigurationValidatorBase
public class LongValidator extends ConfigurationValidatorBase
Not applicable.

The LongValidator is used to ensure a long (a 64-bit signed integer) meets specific criteria. The criteria for validation is established when an instance of the LongValidator class is created. The LongValidator(Int64,Int64) constructor ensures that the long value that is being validated adheres to both a minimum and a maximum length. The LongValidator(Int64,Int64,Boolean) constructor checks both the minimum and maximum Int64 values, as well as whether the validation range is exclusive. The LongValidator(Int64,Int64,Boolean,Int64) constructor checks the previous three parameters and also checks whether the Int64 value 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.

Imports System
Imports System.Configuration

Namespace Microsoft.Samples.AspNet.Validators
  Class UsingLongValidator
    Public Shared Sub Main()

      ' Display title.
      Console.WriteLine("ASP.NET Validators")
      Console.WriteLine()

      ' Create Long and Validator.
      Dim testLong As Int64 = 17592186044416
      Dim minLongVal As Int64 = 1099511627776
      Dim maxLongVal As Int64 = 281474976710656
      Dim myLongValidator As LongValidator = _
       New LongValidator(minLongVal, maxLongVal, False)

      ' Determine if the object to validate can be validated.
      Console.WriteLine("CanValidate: {0}", _
        myLongValidator.CanValidate(testLong.GetType()))

      Try
        ' Attempt validation.
        myLongValidator.Validate(testLong)
        Console.WriteLine("Validated.")

      Catch e As Exception
        ' Validation failed.
        Console.WriteLine("Error: {0}", e.Message.ToString())
      End Try

      ' Display and wait.
      Console.ReadLine()
    End Sub
  End Class
End Namespace

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 Server 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 Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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