private void btnDel_Click(object sender, RoutedEventArgs e)        {            if (DGUser.SelectedItem != null)            {                DataRowView DRV = (DataRowView)DGUser.SelectedItem;                string Name = DRV.Row[0].ToString();//获取选中行的name列内容                if (Name == UserName)//UserName为当前的登陆者                {                    MessageBox.Show("不允许删除自己，请周知！");                }                else                {                    MessageBoxResult result = MessageBox.Show("确定要删除用户？", "提示", MessageBoxButton.YesNo);//弹出删除对话框                    switch (result)                    {                        case MessageBoxResult.Yes:                            DelUserData(Name);//调用函数，删除数据库                            DRV.Delete();//删除行                            MessageBox.Show("删除成功！");                            break;                        case MessageBoxResult.No:                            break;                    }                                    }            }        }