C# “如何处理事件”；“HttpClient”；在Windows Phone 8.1中

下面的代码在WP8中工作，但是当使用WP8.1时，不会触发事件，处理事件的解决方案是什么

HttpClient wb = new HttpClient();
wb.DownloadProgressChanged += new DownloadProgressChangedEventHandler(wcDownloadList_DownloadProgressChanged);
if (itm.LinkUrl.StartsWith("http://www.youtube.com/watch?v="))
{
    wb.OpenReadCompleted += new OpenReadCompletedEventHandler(wcYoutubeReadCompleted_OpenReadCompleted);
}
else
{
    wb.OpenReadCompleted += new OpenReadCompletedEventHandler(wcDownloadList_OpenReadCompleted);
}

---

HttpClient不支持进度报告

最好的方法是使用

Windows.Web.Http.HttpClient

而不是

System.Net.Http.HttpClient

。第一个支持进步

我在中的

HttpClient

中找不到事件

DownloadProgressChanged

尝试使用

webclient

进行

DownloadProgress

。

---

如果您仍然需要

httpclient

来进行报告，您需要自己实现。

我认为您应该使用

WebClient

而不是

httpclient

WebClient client = new WebClient ();
    Uri uri = new Uri(address);

    // Specify that the DownloadFileCallback method gets called 
    // when the download completes.
    client.DownloadFileCompleted += new AsyncCompletedEventHandler (DownloadFileCallback2);
    // Specify a progress notification handler.
    client.DownloadProgressChanged += new DownloadProgressChangedEventHandler(DownloadProgressCallback);

事件处理程序

private static void DownloadProgressCallback(object sender, DownloadProgressChangedEventArgs e)
{
// Displays the operation identifier, and the transfer progress.
Console.WriteLine("{0}    downloaded {1} of {2} bytes. {3} % complete...", 
    (string)e.UserState, 
    e.BytesReceived, 
    e.TotalBytesToReceive,
    e.ProgressPercentage);
}

---

开始下载的代码在哪里？您好，Peter Torr，首先介绍如何为httpclientk启动事件，但如何处理OpenReadCompleted EventWebClient在WP8.1 WinRtHello Rohit中不受支持，而在WP8.1 WinRt应用程序中不支持Eldho webclient。@我们建议为Httpclient启动Chinni。