//修改 private void BtnLogin_Click(object sender, RoutedEventArgs e) { string activityName = txtUserName.Text.Trim(); if (activityName.Length < 1) { popup1.IsOpen = true; } else if (activityName.Trim().Length > 15) { popup2.IsOpen = true; } else { bool flag = dbUtill.UpdateActivityName(activityId, activityName); if (flag == true) { MessageBox.Show("修改成功", "提示"); } else { MessageBox.Show("修改失败", "提示"); } DialogResult = true; } }