Dotnet :- How to achieve windows authentication in window form application?

Question

I want to make a windows form application and want to use windows authentication to log in the user, it has to be used in intranet. the applcation should accept the user name and password from user and should authenticate it. how to achieve this.

Answer 1

You can achieve this using Interop Services. Use the below Code.

    [System.Runtime.InteropServices.DllImport("advapi32.dll")]
    public static extern bool LogonUser(string userName, string domainName, string password, int LogonType, int LogonProvider, ref IntPtr phToken);

    public bool IsValidateCredentials(string userName, string password, string domain)
    {
        IntPtr tokenHandler = IntPtr.Zero;
        bool isValid = LogonUser(userName, domain, password, 3, 0, ref tokenHandler);
        return isValid;
    }

Answer 2

Environment.UserName gives you the username of the current user. A password is not needed since the user have logged into windows.

Alternative: WindowsIdentity.GetCurrent()

Answer 3

Please refer the following link to apply windows Authentication in Intranet:

http://msdn.microsoft.com/library/bb882216.aspx