/*******************ERROR PROVIDER FOR USERNAME*******************/ // Ser error provider if username present in DB private void usernameTextbox_Validating(object sender, CancelEventArgs e) { if (usernameTextbox.Text == "Username") { return; } // pass username to DB for validing existance if (mysql.isUsernameAvailable(usernameTextbox.Text)) { e.Cancel = true; UserNameerrorProvider.SetError(usernameTextbox, "Username already exist in Data Base"); errorMessageLabel.Text = "Username already exist in Data Base"; errorMessageLabel.Show(); } }
// Cancel Error Provider if no error found private void usernameTextbox_Validated(object sender, EventArgs e) { UserNameerrorProvider.SetError(usernameTextbox, null); errorMessageLabel.Text = ""; errorMessageLabel.Show(); }