Window Authentication in WinForms Applicaton

See more:

C#

Windows

WinForms

C#4.0

All,

I have an windows application which can be used in organization level. So we would like to put windows authentication. So I searched and used below code. How to verify the user based on the User name and domain. In the below code, we are passing static LogonType and LogonProvider. So I would like to validate the username and domain against the active directory. For the below code I did not specify the Active Directory path, but i dont know how its working.

Please give a solution to verify username and domain against Active Directory in the server.

[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, 2, 0, ref tokenHandler);
           return isValid;
       }

private void button1_Click_1(object sender, EventArgs e)
        {
            Cursor.Current = Cursors.WaitCursor;

            bool isValid = IsValidateCredentials(txtUserName.Text, txtPassword.Text, txtDomain.Text);
            if (isValid)
            {
                RadForm1 form = new RadForm1();
                form.Show();
                this.Hide();
            }
            else
            {
                lblMsg2.Text = isValid == true ? "Valid User details" : "Invalid User Details";
            }
        }

Please let me know if I am not clear...

Thanks,
Naveen