protected void Btnlogin_Click(object sender, EventArgs e)
    {
        //when you noticed..I split dbprovider and dbsource,
        //actually you can combined them without having
        //concatenation.
        string dbProvider = "PROVIDER = Microsoft.Jet.OLEDB.4.0;";
        string dbSource = "Data Source = C:\\account.mdb";


        OleDbConnection con = new OleDbConnection(dbProvider + dbSource);

        string sql = "SELECT * FROM tblaccount WHERE Username = '" + txtusername.Text +
            "' AND Password = '" + txtpassword.Text +
            "' AND UserLevel = '" + DropDownList1.Text + "'";

        OleDbCommand cmd = new OleDbCommand(sql, con);
        con.Open();

        OleDbDataReader sdr = cmd.ExecuteReader();

        string userlevel; //variable declaration for the user

        userlevel = DropDownList1.SelectedItem.Text.ToString();


        if (sdr.HasRows == true) //determine if the data has rows
        {
            switch (userlevel)//reads the username if it is equal to the given username
            {
                case "User"://if sprint username was input, Loginforsprint.asp web form
                    Response.Redirect("~/Loginforuser.aspx");
                    break;
                case "Admin":
                    Response.Redirect("~/Loginforadmin.aspx");
                    break;
            }

        }
        else
        {
                lblerror.Text = "Invalid data!!";

        }


    }