Xamarin-CrossPlatform POST HttpWebRequest：遠程服務器返回錯誤：NotFound

我在WindowsPhone上打開WebResponse時出現問題，總是在我打開WebResponse時收到異常。我嘗試了很多不同的方法，但是當我使用異步方法時，總會得到一個異常。請幫幫我。Xamarin-CrossPlatform POST HttpWebRequest：遠程服務器返回錯誤：NotFound

例外：

An exception of type 'System.Net.WebException' occurred in System.Net.ni.DLL but was not handled in user code Additional information: The remote server returned an error: NotFound.

private async void btLogin_Click(object sender, RoutedEventArgs e) { 
     Uri uri = new Uri("http://ip-address/users/User/jan_kowalski/a"); 
     HttpWebRequest webRequest = WebRequest.Create(uri) as HttpWebRequest; 
     webRequest.Method = "POST"; 
     webRequest.ContentType = "application/json"; 

     try { 
      using (Stream ss = await webRequest.GetRequestStreamAsync()) { 
       await ss.WriteAsync(new byte[0], 0, 0); 
       await ss.FlushAsync(); 
      } 

      //using (WebResponse webResponse = await webRequest.GetResponseAsync()) {  // <-- Here there is an exception or... 
      // using (StreamReader reader = new StreamReader(webResponse.GetResponseStream())) { 
      //  string data = await reader.ReadToEndAsync(); 
      //  Log.d(TAG, data); 
      // } 
      //} 

      webRequest.BeginGetResponse(async (x) => { 
       WebResponse webResponse = webRequest.EndGetResponse(x);   // <-- ...or here there is an exception 
       StreamReader reader = new StreamReader(webResponse.GetResponseStream()); 
       string text = await reader.ReadToEndAsync(); 
       Log.d(TAG, text); 
      }, null); 

     } catch (WebException exc) { 
      Log.e(TAG, exc.Message + " \n" + 
       exc.Source + "\n status:" + 
       exc.Status + "\n" + 
       exc.Response + " \n " + 
       exc.StackTrace); 
     } catch (Exception ex) { 
      Log.e(TAG, ex.Message + "\n stackTrace: " + ex.StackTrace); 
     } 
}

我注意到，Android和IOS有機會獲得更多的方法，同步方法。當他們使用它一切正常，我從服務器得到正確的答案。但同步方法在Windows手機上不可用！

  Uri uri = new Uri("http://ip-address/users/User/jan_kowalski/a"); 
      WebRequest webRequest = WebRequest.Create(uri); 
      webRequest.Method = "POST"; 
      webRequest.ContentType = "application/json"; 
      try { 
       using (Stream stream = webRequest.GetRequestStream()) { 
        stream.Write(new byte[0], 0, 0); 
       } 
       using (WebResponse stream = webRequest.GetResponse()) { 
        using (StreamReader reader = new StreamReader(stream.GetResponseStream())) { 
         string data = reader.ReadToEnd(); 
         Console.WriteLine(data); 
        } 
       } 
      }catch(Exception ex) { 
       Log.e(TAG, null, ex); 
      }

來源

2016-09-06 ralfbox

我建議你試試HttpClient的，界面清爽多了比的WebRequest：

var client = new HttpClient(); 
var res = await client.PostAsync("http://ip-address/users/User/jan_kowalski/a", new StringContent("hello, world")); 
if (res.IsSuccessStatusCode) 
{ 
    var response = await res.Content.ReadAsStringAsync(); 
}

我無法重現的HttpClient您的問題。

來源

2016-09-06 14:23:52 Cheesebaron

Xamarin-CrossPlatform POST HttpWebRequest：遠程服務器返回錯誤：NotFound

回答

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