共享文件——接收者

protected override void OnShareTargetActivated(ShareTargetActivatedEventArgs args)
{
var rootFrame = Window.Current.Content as Frame;
if (rootFrame == null)
{
rootFrame = new Frame();
Window.Current.Content = rootFrame;
}
rootFrame.Navigate(typeof(ReceivedSharePage), args.ShareOperation);
Window.Current.Activate();
}

private ShareOperation shareOperation;
private IRandomAccessStreamReference sharedBitmapStreamRef;
private IReadOnlyList<IStorageItem> sharedStorageItems;

protected override async void OnNavigatedTo(NavigationEventArgs e)
{
// It is recommended to only retrieve the ShareOperation object in the activation handler, return as
// quickly as possible, and retrieve all data from the share target asynchronously.

this.shareOperation = (ShareOperation)e.Parameter;
await Task.Factory.StartNew(async () =>
{
// Retrieve the data package content.
// The GetWebLinkAsync(), GetTextAsync(), GetStorageItemsAsync(), etc. APIs will throw if there was an error retrieving the data from the source app.
// In this sample, we just display the error. It is recommended that a share target app handles these in a way appropriate for that particular app.
if (this.shareOperation.Data.Contains(StandardDataFormats.Bitmap))
{
try
{
this.sharedBitmapStreamRef = await this.shareOperation.Data.GetBitmapAsync();
}
catch (Exception ex)
{
textResult.Text = "Failed GetBitmapAsync - " + ex.Message;
}
}
if (this.shareOperation.Data.Contains(StandardDataFormats.StorageItems))
{
try
{
this.sharedStorageItems = await this.shareOperation.Data.GetStorageItemsAsync();
}
catch (Exception ex)
{
textResult.Text = "Failed GetBitmapAsync - " + ex.Message;
}
}

// In this sample, we just display the shared data content.
// Get back to the UI thread using the dispatcher.
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, async () =>
{
if (this.sharedBitmapStreamRef != null)
{
IRandomAccessStreamWithContentType bitmapStream = await this.sharedBitmapStreamRef.OpenReadAsync();
BitmapImage bitmapImage = new BitmapImage();
bitmapImage.SetSource(bitmapStream);
imgReceived.Source = bitmapImage;
textResult.Text = "Click OK to continue :)";
//写入记忆文件的位置
(Application.Current as App).localSettings.Values["LastFile"] = this.sharedStorageItems[0].Path;
}
else if (this.sharedStorageItems != null)
{
try
{
StorageFile file = await StorageFile.GetFileFromPathAsync(this.sharedStorageItems[0].Path);
IRandomAccessStreamWithContentType bitmapStream = await file.OpenReadAsync();
BitmapImage bitmapImage = new BitmapImage();
bitmapImage.SetSource(bitmapStream);
imgReceived.Source = bitmapImage;
textResult.Text = "Click OK to continue :)";
//写入记忆文件的位置
(Application.Current as App).localSettings.Values["LastFile"] = this.sharedStorageItems[0].Path;
}
catch
{
textResult.Text = "Sorry, your shared content is not a standard image file :(";
}
}
});
});
}