Object reference not set to an instance of an object.

Hi guys,


I need help in my code. I've been trying to figure out a way to solve this but still i wasn't able to solve it. Here's the scenario i'm creating a login page and i'm trying to restrict users from accessing certain page. They need to login first before they can access the page. Please examin the codes below:


Login.aspx.cs


public partial class Login : System.Web.UI.Page
{
    private login userLogin;

    protected void Page_Load(object sender, EventArgs e)
    {

    }

    private void logUser()
    {
        userLogin = new login();
        if(userLogin.loginUser(txtusername.Text, txtpassword.Text).Table.Rows.Count == 1)
        {
  ...