Async await in Windows Phone web access APIs

Question

Is there support for the async/await pattern in WP8?

I need to get XML from a web-based API and it looks like that WebClient or WebRequest

Answer 1

Are there classes that support async/await usable for web access in the WP8 BCL?

This is a concern that has been raised during the closed beta of the WP8 SDK, so I can answer that unfortunately, no.

But as you mentioned, it is reasonably easy to make your own wrappers.

For instance:

public static class Extensions
{
    public static Task DownloadStringTask(this WebClient webClient, Uri uri)
    {
        var tcs = new TaskCompletionSource();

        webClient.DownloadStringCompleted += (s, e) =>
        {
            if (e.Error != null)
            {
                tcs.SetException(e.Error);
            }
            else
            {
                tcs.SetResult(e.Result);
            }
        };

        webClient.DownloadStringAsync(uri);

        return tcs.Task;
    }
}