private void ComboBox_SelectedIndexChanged(object sender, EventArgs e) { if (comboBox.SelectedIndex != 0) { button_add.Enabled = false; currentPermission = controller.GetPermission(Int32.Parse(comboBox.Text.Split(' ')[0])); textBox_permission_level.Text = currentPermission.Facility_access_level.ToString(); } else { button_add.Enabled = true; textBox_permission_level.Text = ""; } }