WPF Datagrid刪除一行

private void btnDel_Click(object sender, RoutedEventArgs e)
        {
            if (DGUser.SelectedItem != null)
            {
                DataRowView DRV = (DataRowView)DGUser.SelectedItem;
                string Name = DRV.Row[0].ToString();//獲取選中行的name列內容
                if (Name == UserName)//UserName為當前的登陸者
                {
                    MessageBox.Show("不允許刪除自己，請周知！");
                }
                else
                {
                    MessageBoxResult result = MessageBox.Show("確定要刪除用戶？", "提示", MessageBoxButton.YesNo);//彈出刪除對話框
                    switch (result)
                    {
                        case MessageBoxResult.Yes:
                            DelUserData(Name);//調用函數，刪除數據庫
                            DRV.Delete();//刪除行
                            MessageBox.Show("刪除成功！");
                            break;
                        case MessageBoxResult.No:
                            break;
                    }                    
                }
            }
        }