Windows Phone 8.1 通用应用程序中的 HttpClient

所以我正在测试通用应用程序并达到了这个目标:

So i'm testing universal applications and have reached this:

我在 Windows 平板电脑上有一个从服务器获取数据的应用程序.

I have an application on Windows Tablet that gets data from server.

服务器受证书 (SSL) 保护

Server is protected with certificate ( SSL )

我有这个代码，在简单的 Windows 商店应用程序和平板电脑的通用应用程序项目上运行良好，但不是电话

I have this code, runs great on simple Windows Store Application, and Universal application project for tablet, but not Phone

async public static Task<string> GetDataFromServer()
    {
        try
        {
            HttpClientHandler aHandler = new HttpClientHandler();
            aHandler.ClientCertificateOptions = ClientCertificateOption.Automatic;
            HttpClient aClient = new HttpClient(aHandler);
            aClient.DefaultRequestHeaders.ExpectContinue = false;
            aClient.DefaultRequestHeaders.MaxForwards = 3;
            Uri requestUri = new Uri("MYURL");
            HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Get, requestUri);
            var result = await aClient.GetAsync(requestUri, HttpCompletionOption.ResponseContentRead);
            var responseHeader = result.Headers;
            var responseBody = await result.Content.ReadAsStringAsync();
            return responseBody;
        }
        catch (Exception e)
        {
            return "";
        }
    }

所有需要的功能都在清单中设置:

All needed capabilities are set in manifest:

<Capabilities>
<Capability Name="internetClient" />
<Capability Name="sharedUserCertificates" />
<Capability Name="privateNetworkClientServer" />
<Capability Name="internetClientServer" />
 </Capabilities>
 <Extensions>
<Extension Category="windows.certificates">
  <Certificates>
    <Certificate StoreName="Root" Content="Assets\CoolCertificate.cer" />
  </Certificates>
</Extension>

电话代码 - 不会崩溃，没有错误或警告 - 只是空白结果.

Phone code - doesn't crash, no errors or warnings - just blank result.

代码: {StatusCode: 404, ReasonPhrase: 'Not Found', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:{ Content-Length: 0}}没有像 WinRT 那样向用户发出通知:

Code: {StatusCode: 404, ReasonPhrase: 'Not Found', Version: 1.1, Content: System.Net.Http.StreamContent, Headers:{ Content-Length: 0}} And no notification to the user like in WinRT: