protected void btnLogin_Click(object sender, EventArgs e) { DataSet1TableAdapters.MyUsersTableAdapter users = new DataSet1TableAdapters.MyUsersTableAdapter(); int numberOfUsers = users.LoginQuery(txtUser.Text, txtPass.Text).GetValueOrDefault(); if (numberOfUsers > 0) { // login successful! Session.Add("status", "Login"); Response.Redirect("Default.aspx"); // using QueryString //Response.Redirect("Default.aspx?status=Login"); } else { // Failed! txtPass.Text = ""; txtUser.Text = ""; lblErr.Text = "Login failed! Please try again!"; txtUser.BorderColor = System.Drawing.Color.Red; } }