BitmapImage SetSource 崩溃/冻结应用程序 [英] BitmapImage SetSource Crashing/Freezing App

问题描述

我正在尝试从流中设置图像.但是，当我从后台线程设置源并使用调度程序时，它会完全冻结应用程序.流不为空，我已经验证过.

I am trying to set the image from a stream. However when I set the source from the background thread and use a dispatcher it freezes the app completely. The stream is not null, I have verified that.

我正在使用 taglib api 来获取 mp3 文件的专辑图片流.我什么都试过了.

I am using the taglib api to get the stream of the album picture of an mp3 file. I've tried everything.

async void Background(object sender, MediaPlayerDataReceivedEventArgs e)
{         
   IRandomAccessStream AlbumArtStream = await Media.GetAlbumArt(MediaFile.Name, await MediaFile.OpenStreamForReadAsync());

   await this.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, () =>
   {
        ViewModel.NewAlbumArt = new BitmapImage();
        NewAlbumArt.SetSource(AlbumArtStream);
   }
}

推荐答案

喜欢在评论中 - 为了防止冻结您的应用程序，请调用 SetSoruceAsync:

Like in comment - to prevent freezing your app, call SetSoruceAsync:

async void Background(object sender, MediaPlayerDataReceivedEventArgs e)
{         
   IRandomAccessStream AlbumArtStream = await Media.GetAlbumArt(MediaFile.Name, await MediaFile.OpenStreamForReadAsync());

   await this.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, async () =>
   {
      ViewModel.NewAlbumArt = new BitmapImage();
      await NewAlbumArt.SetSourceAsync(AlbumArtStream);
   }
}

您可以阅读更多在 MSDN:

通过调用异步 SetSourceAsync 方法而不是类似的 SetSource 方法来设置图像源可以避免阻塞 UI 线程....

Setting an image source by calling the asynchronous SetSourceAsync method rather than the similar SetSource method avoids blocking the UI thread. ...

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