protected void ButtonOk_Click(object sender, EventArgs e) { AccountManager accountManager = new AccountManager(ConfigurationManager.ConnectionStrings["XiahDb"].ConnectionString, ConfigurationManager.ConnectionStrings["XiahDb"].ProviderName); TextBox UsernameTextBox = LoginView.FindControl("UsernameTextBox") as TextBox; TextBox PasswordTextBox = LoginView.FindControl("PasswordTextBox") as TextBox; Label UsernameExistsLabel = LoginView.FindControl("UsernameExistsLabel") as Label; if (Page.IsValid) { try { accountManager.InsertUser(UsernameTextBox.Text, PasswordTextBox.Text); Response.Redirect("~/AccountCreated.aspx"); } catch (SqlException) { UsernameExistsLabel.Text = "Username exists, choose a different one."; } } }