C＃-從WebResponse獲取響應

Question

我正在嘗試下載放置在Internet上的RSS feed的XML源代碼，但是當我的過程到達WebResponse語句（下面的第二行）時，過程停止，並且接下來什么都沒有發生。 沒有錯誤，沒有例外或類似的東西。 我正在等待數十分鍾，仍然沒有任何反應。

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嗎？

編輯：

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

幾乎可以肯定，您的應用程序將在返回的任務中進一步調用調用堆棧上的Wait或Result ，這將導致死鎖 ，我將在博客中詳細解釋。

要解決此問題，請找到上游的Wait / Result調用，並將其更改為await 。 換句話說，使用“一路異步”。