C＃-从WebResponse获取响应

Question

我正在尝试下载放置在Internet上的RSS feed的XML源代码，但是当我的过程到达WebResponse语句（下面的第二行）时，过程停止，并且接下来什么都没有发生。 没有错误，没有例外或类似的东西。 我正在等待数十分钟，仍然没有任何反应。

WebRequest request = WebRequest.Create(source.Url);
WebResponse response = await request.GetResponseAsync(); // at this line it stops
Stream receiveStream = response.GetResponseStream();
StreamReader readStream = new StreamReader(receiveStream);

string xml = readStream.ReadToEnd().Trim();

readStream.Dispose();
response.Dispose();

知道是什么原因造成的吗？

编辑：

public static async Task<string> GetContent(string uri)
{
    WebRequest request = WebRequest.Create(url);

    using (WebResponse response = await request.GetResponseAsync().ConfigureAwait(false))
    {
        Stream receiveStream = response.GetResponseStream();
        StreamReader readStream = new StreamReader(receiveStream);

        return readStream.ReadToEnd().Trim();
    }
}

public async Task<ObservableCollection<Source>> GetArticlesFromSource()
{
    sourceDefinitions = await GetSourceDefinitions();

    string imageFolderName = "ArticleImages";
    string imageFolderPath = localFolder.Path + "\\" + imageFolderName;
    StorageFolder imageFolder = await localFolder.CreateFolderAsync(imageFolderName, CreationCollisionOption.ReplaceExisting);

    foreach (var source in sourceDefinitions)
    {
        if (source.Selected == "true")
        {
            ObservableCollection<Article> articlesStep1 = new ObservableCollection<Article>();
            /*WebRequest request = WebRequest.Create(source.Url);
            WebResponse response = await request.GetResponseAsync();
            Stream receiveStream = response.GetResponseStream();
            StreamReader readStream = new StreamReader(receiveStream);*/

            string xml = await GetContent("http://www.honzachalupa.cz/").ConfigureAwait(false);

            Debug.WriteLine(xml);
            ...

Answer 1

几乎可以肯定，您的应用程序将在返回的任务中进一步调用调用堆栈上的Wait或Result ，这将导致死锁 ，我将在博客中详细解释。

要解决此问题，请找到上游的Wait / Result调用，并将其更改为await 。 换句话说，使用“一路异步”。