ShareOperation.ReportCompleted() 导致在 UWP 中抛出异常

Question

我正在尝试处理共享操作代码：

protected override async void OnShareTargetActivated(ShareTargetActivatedEventArgs args)
{
     ShareOperation shareOperation = args.ShareOperation;
     Uri uriReceived = null;
     if (shareOperation.Data.Contains(StandardDataFormats.WebLink))
        uriReceived = await shareOperation.Data.GetWebLinkAsync();
     shareOperation.ReportCompleted();
}

它在 shareOperation.ReportCompleted(); 崩溃，显示错误消息

"There was no match for the specified key in the index."

我试着搜索这个错误，让我找到了 this 问题，但它似乎是一个在后来的版本中消失的问题，现在我正面临这个问题，你建议我如何处理它。

Answer 1

根据Receive data的Report sharing status部分，

As a result, you shouldn't call it unless your app is at a point where it can be dismissed by the user.

我猜异常的原因是报告操作需要用户的权限。如果直接调用 ShareTargetActivated 中的 shareOperation.ReportCompleted(); 将跳过用户授权。好像是不允许的。对于解决方法，您可以在 Button_Click 或 OnGotFocus 等函数中处理代码 shareOperation.ReportCompleted(); 。以下代码示例可以解决您的问题。

App.xaml.cs代码：

protected override async void OnShareTargetActivated(ShareTargetActivatedEventArgs args)
{
    Frame rootFrame = Window.Current.Content as Frame;
    if (rootFrame == null)
    {
        rootFrame = new Frame();
        rootFrame.Language = Windows.Globalization.ApplicationLanguages.Languages[0];
        rootFrame.NavigationFailed += OnNavigationFailed;
        Window.Current.Content = rootFrame;
    }
    rootFrame.Navigate(typeof(MainPage), args.ShareOperation);
    Window.Current.Activate();           
}

MainPage.xaml.cs代码：

  ShareOperation shareOperation;
  protected override async void OnGotFocus(RoutedEventArgs e)
  {
      Uri uriReceived = null;
      if (shareOperation.Data.Contains(StandardDataFormats.WebLink))
          uriReceived = await shareOperation.Data.GetWebLinkAsync();
      this.shareOperation.ReportCompleted();
      base.OnGotFocus(e);
  }
  protected override async void OnNavigatedTo(NavigationEventArgs e)
  {
      this.shareOperation = (ShareOperation)e.Parameter;
  }

更多详情请参考官方sharetarget sample。

ShareOperation.ReportCompleted() 导致在 UWP 中抛出异常

ShareOperation.ReportCompleted() results in exception being thrown in UWP

c#

windows-runtime

uwp