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WP8 HttpWebRequest發布不起作用

[英]WP8 HttpWebRequest Post Not Working

我有一個Windows Phone應用程序,我正在嘗試將JSON格式的數據發布到WCF應用程序。 盡管已建立連接,但服務器將返回一條帶有以下內容的自定義消息:

這是C#代碼:

ReportSightingRequest.Instance.Source = Source.IPhone;
var jsonData = JsonConvert.SerializeObject(ReportSightingRequest.Instance);
var uri = new Uri("urlGoesHere", UriKind.Absolute);

var request = (HttpWebRequest)WebRequest.Create(uri);
request.Method = "POST";
request.ContentType = "application/json";
request.ContentLength = jsonData.Length;

string received;
using (var response = (HttpWebResponse)(await Task<WebResponse>.Factory.FromAsync(request.BeginGetResponse, request.EndGetResponse, null)))
{
    using (var responseStream = response.GetResponseStream())
    {
        using (var sr = new StreamReader(responseStream))
        {
            received = await sr.ReadToEndAsync();
        }
    }
}

這是WCF接口:

[OperationContract]
[WebInvoke(Method = "POST", RequestFormat = WebMessageFormat.Json, ResponseFormat = WebMessageFormat.Json)]
[Description("Description.")]
Response.Response ReportSighting(ReportSightingRequest sighting);

這是實現:

public Response ReportSighting(ReportSightingRequest sightingRequest)
{
    var response = new Response();
    if (sightingRequest == null || sightingRequest.TypeId == null)
    {
       response.Status = ResponseStatus.InvalidArguments;
       response.Message = "Request is null or no type has been supplied.";
       return response;
    }
...
}

當我從電話中調用ReportSighting方法時,收到“請求為空或沒有提供任何類型”消息。 奇怪的是, 發送TypeIdsightingRequest在WP8側的對象絕對不是空的時候我送它。 當我在jsonData上放置一個斷點時,它包含了所有內容。 ReportSightingRequest對象也與WCF應用程序中的ReportSightingRequest完全相同。

幾乎感覺對象沒有被序列化。 那是我唯一能想到的。

有沒有人有任何想法/建議?

更新資料

我注意到我實際上沒有發送該對象。 Shawn Kendrot的“答案”似乎很有意義,但是當我集成他的代碼時,它會返回“ 未找到”錯誤。

更新以下代碼在控制台應用程序中起作用:

        var jsonData = "a hard coded JSON string here";
        var uri = new Uri("a url goes here", UriKind.Absolute);
        var webRequest = (HttpWebRequest)WebRequest.Create(uri);
        webRequest.Method = "POST";
        webRequest.ContentType = "application/json; charset=utf-8";
        webRequest.ContentLength = jsonData.Length;

        webRequest.BeginGetRequestStream(ar =>
        {
            try
            {
                using (var os = webRequest.EndGetRequestStream(ar))
                {
                    var postData = Encoding.UTF8.GetBytes(jsonData);
                    os.Write(postData, 0, postData.Length);
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.Message);
            }

            webRequest.BeginGetResponse(
                ar2 =>
                {
                    try
                    {
                        using (var response = webRequest.EndGetResponse(ar2))
                        using (var reader = new StreamReader(response.GetResponseStream()))
                        {
                            var received = reader.ReadToEnd();
                            //Console.WriteLine(received);
                        }
                    }
                    catch (Exception ex)
                    {
                        Console.WriteLine(ex.Message);
                    }
                }, null);
        }, null);

更新我已更改WP8中的代碼以匹配Shawn Kendrot的解決方案。 我在這里面臨的問題是我收到Not Found錯誤消息:

webRequest.BeginGetRequestStream(ar =>
            {
                try
                {
                    using (var os = webRequest.EndGetRequestStream(ar))
                    {
                        var postData = Encoding.UTF8.GetBytes(jsonData);
                        os.Write(postData, 0, postData.Length);
                    }
                }
                catch (Exception ex)
                {
                    MessageBox.Show("Unsuccessful");
                }

                webRequest.BeginGetResponse(
                    ar2 =>
                    {
                        try
                        {
                            using (var response = webRequest.EndGetResponse(ar2))
                            using (var reader = new StreamReader(response.GetResponseStream()))
                            {
                                var received = reader.ReadToEnd();
                            }
                        }
                        catch (Exception ex)
                        {
                            MessageBox.Show("Unsuccessful");
                        }
                    }, null);
            }, null);

我得到:

{System.UnauthorizedAccessException:無效的跨線程訪問。 在MS.Internal.XcpImports.CheckThread()在System.Windows.MS.Internal.XcpImports.MessageBox_ShowCore(String messageBoxText,字符串標題,UInt32類型)在System.Windows.MessageBox.ShowCore(String messageBoxText,字符串標題,MessageBoxButton按鈕)在System.Windows .MessageBox.Show(字符串messageBoxText),位於Notify.Logic.WebServices。<> c_ DisplayClass2.b _1(IAsyncResult ar2),位於System.Net.Browser.ClientHttpWebRequest。<> c_ DisplayClass1d.b _1b(對象state2)}

當我嘗試做`MessageBox.Show(ex.Message);時

更新資料

我已經解決了MessageBox.Show錯誤消息的問題。

webRequest.Headers對象具有以下內容:

{Content-Type: application/json; charset=utf-8;}

您的sightingRequest為空,因為您沒有發送任何數據。 要使用WebRequest發送數據,您需要使用BeginGetRequestStream方法。 此方法使您可以打包數據。

var webRequest= (HttpWebRequest)WebRequest.Create(uri);
webRequest.Method = "POST";
webRequest.ContentType = "application/json";
webRequest.ContentLength = jsonData.Length;
webRequest.BeginGetRequestStream(ar =>
{
    try
    {
        using (Stream os = webRequest.EndGetRequestStream(ar))
        {
            var postData = Encoding.UTF8.GetBytes(jsonData);
            os.Write(postData, 0, postData.Length);
        }
    }
    catch (Exception ex)
    {
        // Do something, exit out, etc.
    }

    webRequest.BeginGetResponse(
        ar2 =>
        {
            try
            {
                using (var response = webRequest.EndGetResponse(ar2))
                using (var reader = new StreamReader(response.GetResponseStream()))
                {
                    string received = reader.ReadToEnd();
                }
            }
            catch (Exception ex)
            {
                // Do something, exit out, etc.
            }
        }, null);
}, null);

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