Youtube C# .NET API : Uploading video and getting events when finished

问题

This is the code to upload a video to Youtube using the C# .NET API from a Windows Forms desktop application:

YouTubeRequestSettings settings = new YouTubeRequestSettings("whatwill come here ?",
                "my api key",
                "my youtube login email", "my youtube login password");
YouTubeRequest request = new YouTubeRequest(settings);

Video newVideo = new Video();

newVideo.Title = "test 1";
newVideo.Tags.Add(new MediaCategory("Gaming", YouTubeNameTable.CategorySchema));
newVideo.Keywords = "test 1 , test 2";
newVideo.Description = "test 3 test 4";
newVideo.YouTubeEntry.Private = false;
newVideo.Tags.Add(new MediaCategory("tag 1, tag 2",
              YouTubeNameTable.DeveloperTagSchema));
newVideo.YouTubeEntry.Location = new GeoRssWhere(37, -122);
newVideo.YouTubeEntry.MediaSource = new MediaFileSource("C:\\test.avi", "video/quicktime");         
Video createdVideo = request.Upload(newVideo);

This works. What I'm looking for is the events that get me back the upload progress, so I can show the progress in a progressbar. Ich can register the following events:

                            request.Service.AsyncOperationProgress +=
                            new AsyncOperationProgressEventHandler(Service_AsyncOperationProgress);
                        request.Service.AsyncOperationCompleted +=
                            new AsyncOperationCompletedEventHandler(Service_AsyncOperationCompleted);

... but they never get fired while uploading. Also, I cannot find any documentation about the .NET api that goes much further than the small video upload example above. So: Are those the wrong events to look for? Just for reference, I'm starting the seemingly synchonous upload in the following code in a background thread:

            ThreadPool.QueueUserWorkItem(
            delegate
                {
                    try
                    {
                        createdVideo = request.Upload(newVideo);
                    } catch (Exception ex){
                      Invoke((ThreadStart) delegate{uploadingFailedWithException(ex);});
                    }
                });
            Invoke((ThreadStart)readyUploading);

This way I know when the synchonous operation ended, but I'd like to have events for progress updates to the user. Any ideas?

回答1:

The Upload method you are using is synchronous and, as such, the execution of your program will stop on that line of code and only move on when the upload is complete.

What you are trying to do requires using asynchronous upload. A complete example showing how to use the ResumableUploader component and the AsyncOperationCompleted/AsyncOperationProgress events is included in the .NET client library and available at http://code.google.com/p/google-gdata/source/browse/#svn%2Ftrunk%2Fclients%2Fcs%2Fsamples%2FYouTubeUploader%2FYouTubeUploader

来源：https://stackoverflow.com/questions/6441553/youtube-c-sharp-net-api-uploading-video-and-getting-events-when-finished