UsernamePasswordValidator Class

Namespace: System.Net.Security
Assembly: System.dll

Provides a mechanism for authenticating a user based on a username and password.

Class Members

UsernamePasswordValidator()

Initializes a new instance of the UsernamePasswordValidator class.
Validate(string, string)

Validates the provided username and password.

UsernamePasswordValidator()

public UsernamePasswordValidator()

Initializes a new instance of the UsernamePasswordValidator class.

Remarks

This is the default constructor for the UsernamePasswordValidator class. It does not perform any operations beyond initializing the object.

Validate(string, string)

public virtual bool Validate(string userName, string password)

Validates the provided username and password.

Parameters

string userName
The username to validate.
string password
The password to validate.

Return Value

true if the username and password are valid; otherwise, false.

Remarks

This method is intended to be overridden by derived classes to implement specific username and password validation logic. The default implementation always returns false, indicating that validation has failed.

When implementing this method in a derived class, you should perform checks against your authentication store (e.g., database, LDAP) to verify the credentials.

Example (C#)


using System;
using System.Net.Security;

public class MyCustomValidator : UsernamePasswordValidator
{
    public override bool Validate(string userName, string password)
    {
        // Replace with your actual validation logic
        if (userName == "admin" && password == "secret123")
        {
            Console.WriteLine($"User '{userName}' authenticated successfully.");
            return true;
        }
        else
        {
            Console.WriteLine($"Authentication failed for user '{userName}'.");
            return false;
        }
    }
}

public class Example
{
    public static void Main(string[] args)
    {
        MyCustomValidator validator = new MyCustomValidator();

        bool isValid1 = validator.Validate("admin", "secret123"); // true
        bool isValid2 = validator.Validate("user", "wrongpass"); // false

        Console.WriteLine($"Validation 1: {isValid1}");
        Console.WriteLine($"Validation 2: {isValid2}");
    }
}

Example (VB.NET)


Imports System
Imports System.Net.Security

Public Class MyCustomValidator
    Inherits UsernamePasswordValidator

    Public Overrides Function Validate(userName As String, password As String) As Boolean
        ' Replace with your actual validation logic
        If userName = "admin" AndAlso password = "secret123" Then
            Console.WriteLine($"User '{userName}' authenticated successfully.")
            Return True
        Else
            Console.WriteLine($"Authentication failed for user '{userName}'.")
            Return False
        End If
    End Function
End Class

Public Class Example
    Public Shared Sub Main(args As String())
        Dim validator As New MyCustomValidator()

        Dim isValid1 As Boolean = validator.Validate("admin", "secret123") ' True
        Dim isValid2 As Boolean = validator.Validate("user", "wrongpass") ' False

        Console.WriteLine($"Validation 1: {isValid1}")
        Console.WriteLine($"Validation 2: {isValid2}")
    End Sub
End Class