获取另一个网站的内容到我的Windows Phone 8应用程序-Java 学习之路

我使用httpwebrequest将其他网站的内容导入我的Windows Phone应用程序，如下所示 . 我想获取页面的html，然后解析它以获得我想要的数据 .

private void Button_Click(object sender, RoutedEventArgs e)
        {
            System.Uri targetUri = new System.Uri("http://www.contoso.com");
            HttpWebRequest request = (HttpWebRequest)HttpWebRequest.Create(targetUri);
            request.BeginGetResponse(new AsyncCallback(ReadWebRequestCallback), request); 
        }

        private void ReadWebRequestCallback(IAsyncResult callbackResult)
        {
            HttpWebRequest myRequest = (HttpWebRequest)callbackResult.AsyncState;
      HttpWebResponse myResponse=(HttpWebResponse)myRequest.EndGetResponse(callbackResult);// Exception is showing here.

            using (StreamReader httpwebStreamReader = new StreamReader(myResponse.GetResponseStream()))
            {
                string results = httpwebStreamReader.ReadToEnd();
                //TextBlockResults.Text = results; //-- on another thread!
                Dispatcher.BeginInvoke(() => TextBlockResults.Text = results);
            }
            myResponse.Close();
        }

但是得到以下错误：

{System.Net.WebException：远程服务器返回错误：NotFound . ---> System.Net.WebException：远程服务器返回错误：NotFound . 在System.Net.Browser.ClientHttpWebRequest上的System.Net.Browser.ClientHttpWebRequest.InternalEndGetResponse（IAsyncResult asyncResult） . <> c_DisplayClasse.b_d（Object sendState）在System.Net.Browser.AsyncHelper . <> c_DisplayClass1.b_0（Object sendState） ---内部异常堆栈跟踪的结束---在myApplication.MainPage.RespCallback处的System.Net.Browser.ClientHttpWebRequest.EndGetResponse（IAsyncResult asyncResult）的System.Net.Browser.AsyncHelper.BeginOnUI（SendOrPostCallback beginMethod，Object state）中IAsyncResult asynchronousResult）}

可能是什么问题？任何帮助将不胜感激 . 谢谢 .

1 回答

试试这段代码（WebClient）：

public void Client(string uri)
{
    var clientToken = new WebClient();
    clientToken.OpenReadCompleted += clientToken_OpenReadCompleted;
    clientToken.OpenReadAsync(new Uri(uri));
}

private void clientToken_OpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
{
    if (e.Error == null)
    {
       Stream reply = e.Result;
       StreamReader reader = new StreamReader(reply);

       MessageBox.Show(reader.ReadToEnd());
    }
}

或者阅读这篇文章Portable HttpClient for .NET Framework and Windows Phone

回复于 2024-05-08T07:49:23+08:00

获取另一个网站的内容到我的Windows Phone 8应用程序

1 回答

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