Question

我有使用Windows Phone 8的经验，我正在使用WCF数据服务，我可以使用以下代码成功更新我的记录：

public void UpdateJob1(EquipBooking equipBooking)
        {
            this._context.UpdateObject(equipBooking);
            this._context.BeginSaveChanges(OnChangesSaved, this._context);
        }

        private void OnChangesSaved(IAsyncResult result)
        {
            bool errorFound = false;
            Deployment.Current.Dispatcher.BeginInvoke(() =>
            {
                this._context = result.AsyncState as THA001_devEntities;

                try
                {
                    // Complete the save changes operation.
                    this._context.EndSaveChanges(result);
                }
                catch (DataServiceRequestException ex)
                {
                    errorFound = true;
                    MessageBox.Show("Error, While Updating Record");
                }

                if (!errorFound)
                {
                    MessageBox.Show("Record Successfully Updated");
                }
            }
            );

        }

但我在窗口商店应用程序中编写相同代码时出现问题，我无法更新记录，我在这里遇到问题：Deployment.Current.Dispatcher.BeginInvoke

任何人都可以指导我，或者重写我的代码吗？

感谢

Answer 1

您是否尝试过使用此而不是Deployment.Current.Dispatcher.BeginInvoke

CoreDispatcher dispatcher = CoreWindow.GetForCurrentThread().Dispatcher;
await dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
      {

      });

编辑：

然后整个方法是：

private async void OnChangesSaved(IAsyncResult result)
{
    bool errorFound = false;
    CoreDispatcher dispatcher = CoreWindow.GetForCurrentThread().Dispatcher;
    await dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
      {
        this._context = result.AsyncState as THA001_devEntities;
        try
        {
            // Complete the save changes operation.
            this._context.EndSaveChanges(result);
        }
        catch (DataServiceRequestException ex)
        {
            errorFound = true;
            MessageBox.Show("Error, While Updating Record");
        }

        if (!errorFound)
        {
            MessageBox.Show("Record Successfully Updated");
        }
      });
}

Answer 2

这是我写的，请批准语法

public void ModfityJobs(EquipBooking equipBooking)
        {
            try
            {
                this.IsDataLoaded = true;
                _context.BeginSaveChanges(ModfityJobsAsynchCallBack, equipBooking);
            }
            catch (Exception ex)
            {
            }
        }

        private void ModfityJobsAsynchCallBack(IAsyncResult synchresult)
        {
            try
            {
                dispatcher.RunAsync(CoreDispatcherPriority.Normal, async () =>
                    {
                        _context.EndSaveChanges(synchresult);
                    });
            }
            catch (Exception)
            {

                throw;
            }
        }

Deployment.Current.Dispatcher.BeginInvoke如何在Windows应用商店中运行？

2 个答案: