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UserNamePasswordValidator Class

Validates a username and password.

Namespace:  System.IdentityModel.Selectors
Assembly:  System.IdentityModel (in System.IdentityModel.dll)

Public MustInherit Class UserNamePasswordValidator
Dim instance As UserNamePasswordValidator

Use the UserNamePasswordValidator class to specify how a username and password is validated. This can be done by deriving a class from UserNamePasswordValidator and override the Validate method. For more information about creating a custom user name and password validator, see How to: Use a Custom User Name and Password Validator.

Public Class MyCustomUserNameValidator
    Inherits UserNamePasswordValidator

    ' This method validates users. It allows two users, test1 and test2  
    ' with passwords 1tset and 2tset respectively. 
    ' This code is for illustration purposes only and  
    ' MUST NOT be used in a production environment because it is NOT secure.	 
    Public Overrides Sub Validate(ByVal userName As String, ByVal password As String)
        If Nothing = userName OrElse Nothing = password Then 
            Throw New ArgumentNullException()
        End If 

        If Not (userName = "test1" AndAlso password = "1tset") AndAlso Not (userName = "test2" AndAlso password = "2tset") Then 
            Throw New SecurityTokenException("Unknown Username or Password")
        End If 

    End Sub 'Validate
End Class 'MyCustomUserNameValidator


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 Server 2008 R2, Windows Server 2008, Windows Server 2003

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