I am getting an error when it is determining whether the username is is false or not. I am using asp.net in code-behind. It is highlighted below. If someone can tell me what the error is that would be amazing!

Thank you!

using System;
using System.Data;
using System.Configuration;
using System.Collections;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using System.Web.UI.WebControls;

namespace WebApplication2
{
    public partial class WebForm1 : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            if ((Session["Check"] != null) && (Convert.ToBoolean(Session["Check"]) == true))
            {
                if (User.Identity.IsAuthenticated)
                {
                    Output.Text = "You are logged in!";
                }
            }
        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            SqlConnection connection = new SqlConnection("Data Source = ietm-fwb-sql1; Initial Catalog = import_log; Persist Security Info = True; User ID = sa; Password = fwbadmin");

            try
            {
                connection.Open();
                UserName.Text = "Connected!";
            }

            catch (Exception)
            {
                UserName.Text = "Not connected";
            }
        }

        protected void Login_Authenticate(object sender, AuthenticateEventArgs e)
        {
            Boolean blnresult;
            blnresult = false;

            blnresult = Authentication(Login.UserName);

            if (blnresult == true)
            {
                e.Authenticated = true;
                Session["Check"] = true;
            }
            else

                e.Authenticated = false;
        }

        private bool Authentication(TextBox textBox)
        {
            throw new NotImplementedException();
        }

        protected static Boolean Authentication(string Username, string Password)
        {
            string sqlstring;
            sqlstring = "SELECT userID FROM import_log.dbo.user_verification WHERE userID =" + Username + "";

            System.Data.SqlClient.SqlConnection con = new System.Data.SqlClient.SqlConnection("Data Source = ietm-fwb-sql1; Initial Catalog = import_log; Persist Security Info = True; User ID = sa; Password = fwbadmin");

            System.Data.SqlClient.SqlCommand comm = new System.Data.SqlClient.SqlCommand(sqlstring, con);

            System.Data.SqlClient.SqlDataReader reader;

            con.Open();

            reader = comm.ExecuteReader();

            if (reader.Read())
                return true;
            else
                return false;
        }
    }
}

Do it this way:

protected void Login_Authenticate(object sender, AuthenticateEventArgs e)
        {
            Boolean blnresult = Authentication("userName", "password"); //provide 2 arguments in here!!!!
            if (blnresult == true)
            {
                e.Authenticated = true;
                Session["Check"] = true;
            }
            else

                e.Authenticated = false;
        }

        protected static Boolean Authentication(string Username, string Password)
        {
            string sqlstring;
            sqlstring = "SELECT userID FROM import_log.dbo.user_verification WHERE userID =" + Username + "";

            System.Data.SqlClient.SqlConnection con = new System.Data.SqlClient.SqlConnection("Data Source = ietm-fwb-sql1; Initial Catalog = import_log; Persist Security Info = True; User ID = sa; Password = fwbadmin");

            System.Data.SqlClient.SqlCommand comm = new System.Data.SqlClient.SqlCommand(sqlstring, con);

            System.Data.SqlClient.SqlDataReader reader;

            con.Open();

            reader = comm.ExecuteReader();

            if (reader.Read())
                return true;
            else
                return false;
        }
    }
}

What error are you getting?

I'm getting the error that an object reference for the non-static field, method, or property "System.Web.UI.WebControls.Login.UserName.get"

Mitja, I am still getting an error (the one that is posted below)

Do it this way:

protected void Login_Authenticate(object sender, AuthenticateEventArgs e)
        {
            Boolean blnresult = Authentication("userName", "password"); //provide 2 arguments in here!!!!
            if (blnresult == true)
            {
                e.Authenticated = true;
                Session["Check"] = true;
            }
            else

                e.Authenticated = false;
        }

        protected static Boolean Authentication(string Username, string Password)
        {
            string sqlstring;
            sqlstring = "SELECT userID FROM import_log.dbo.user_verification WHERE userID =" + Username + "";

            System.Data.SqlClient.SqlConnection con = new System.Data.SqlClient.SqlConnection("Data Source = ietm-fwb-sql1; Initial Catalog = import_log; Persist Security Info = True; User ID = sa; Password = fwbadmin");

            System.Data.SqlClient.SqlCommand comm = new System.Data.SqlClient.SqlCommand(sqlstring, con);

            System.Data.SqlClient.SqlDataReader reader;

            con.Open();

            reader = comm.ExecuteReader();

            if (reader.Read())
                return true;
            else
                return false;
        }
    }
}
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