private async void SaveNotification_Clcik(object sender, RoutedEventArgs e)
        {
            if (isAddNewNotification)
            {
                if (notificationBLL.InsertNotification(notificationInfo.notificationModel))
                {
                    MsgHelper.RefreshDataGrid();
                    this.Close();
                }
                else
                {
                    await this.ShowMessageAsync("提示", "添加失败!");
                }
            }
            else//修改
            {
                if (notificationBLL.UpdateNotification(notificationInfo.notificationModel))
                {
                    this.Hide();
                    await this.ShowMessageAsync("提示", "修改成功!");

                    MsgHelper.RefreshDataGrid();
                    this.Close();
                }
                else
                {
                    await this.ShowMessageAsync("提示", "修改失败!");
                }
            }
        }