How to validate a user in Active Directory using C#?

Question

This example shows you how to check given input contains only numbers (digits) or not using regular expression in asp.net and c#.

Regular expression
string strRegexpNumber = @"^[0-9 ]*$";

Answer 1

Do you want to validate a user with the login credentials like username and password of the user in Active Directory using C#? You can do it using the classes provided in the Directory Services namespace. You need to include the assemblies “System.DirectoryServices” and “System.DirectoryServices.AccountManagement” in your solution.

Below is a sample code snippet demonstrating the validation of the user login credentials in the active directory.

using System;

using System.Collections.Generic;

using System.Data;

using System.DirectoryServices.AccountManagement;

using System.IO;

using System.Linq;

namespace AbundantCode

{

internal class Program

{

// How to Validate a user in Active Directory using C# ?

private static void Main(string[] args)

{

using (PrincipalContext pc = new PrincipalContext(ContextType.Domain, "ABUNDANTCODEDOMAIN"))

{

bool Valid = pc.ValidateCredentials("UserName", "Password");

Console.WriteLine(Valid);

}

Console.ReadKey();

}

}

}