CODEWITHSUNDEEP
c#.netwcfuwpstreaming
Bui Quang Huy
Bui Quang Huy

Reputation: 1794

Streaming video from WCF server to UWP client

Like what I wrote in the title: In the server side I have this method:

[OperationContract]
Stream GetStream();

It return the stream but when I get it in the client, it return the byte[]:

 public System.Threading.Tasks.Task<byte[]> GetStreamAsync() {
            return base.Channel.GetStreamAsync();
        }

I still dont understand. Do anyone meet this error like me, or how can I streaming with this return type.

Upvotes: 0

Views: 311

Answers (1)

ashchuk
ashchuk

Reputation: 331

Maybe you should do like this?

Add endpoint in WCF Web.config

<endpoint address="files" behaviorConfiguration="WebBehavior"
      binding="webHttpBinding" bindingConfiguration="HttpStreaming"
      contract="WebService.IFileService" />
<endpoint address="data" binding="basicHttpBinding" contract="WebService.MyWCFService" />

When do like this in your service .svc file

namespace WebService
{
    [ServiceBehavior(InstanceContextMode = InstanceContextMode.PerCall)]
    public class MyWCFService : IFileService
    {
        public Stream DownloadFile()
        {
            var filePath = "test.txt";

            if (string.IsNullOrEmpty(filePath))
                throw new FileNotFoundException("File not found");

            return File.OpenRead(filePath);
    }
}

namespace WebService
{
    [ServiceContract]
    public interface IFileService
    {
        [WebGet]
        Stream DownloadFile(string FileId);
    }
}

And on Client side. First update your WCF service reference, and when:

public async Task DownloadFile(string FileId)
    {
        string serverAddress = "http...../MyWCFService.svc";

        string filename = "test.txt";

        StorageFolder folder = KnownFolders.PicturesLibrary;
        var file = await folder.CreateFileAsync(filename, CreationCollisionOption.ReplaceExisting);

        BackgroundDownloader downloader = new BackgroundDownloader();
        DownloadOperation download = downloader.CreateDownload(new Uri($"{serverAddress}/files/DownloadFile?FileId={FileId}"), file);

        await download.StartAsync();
    }

Upvotes: 1

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