private void OkButton_Click(object sender, RoutedEventArgs e)
{
var failed = Connection.SaveUser(_toDelete);
var t = string.Empty;
for (var i = 0; i < failed.Count; i++)
{
if (i != failed.Count - 1)
{
t += failed[i] + "、";
}
else
{
t += failed[i];
}
}
if (failed.Count != 0)
{
MessageBox.Show("以下用户未能保存，因为已存在相同用户名的用户：\n" + t, "提示", MessageBoxButton.OK, MessageBoxImage.Error);
}
UserHelper.GetUserBelongs();
Close();
}