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我有一个 Windows Phone 应用程序，我正在尝试将 JSON 格式的数据发布到 WCF 应用程序。尽管建立了连接，但服务器会返回一条自定义消息，其中包含

这是 C# 代码：

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();
        }
    }
}

这是 WCF 接口：

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

这是实现：

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;
    }
...
}

当我从电话中调用 ReportSighting 方法时，我收到“请求为空或未提供类型”消息。奇怪的是，我正在发送 a并且 WP8 端的对象在我发送时绝对不为空。当我在 jsonData 上设置断点时，它包含了所有内容。该对象也与 WCF 应用程序中的对象完全相同。TypeIdsightingRequestReportSightingRequestReportSightingRequest

几乎感觉对象没有被序列化。这是我唯一能想到的。

有没有人有任何想法/建议？

更新

我注意到我实际上并没有发送对象。Shawn Kendrot 的答案似乎很有意义，但是当我集成他的代码时，它返回一个Not Found错误。

更新 以下代码适用于控制台应用程序：

        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 我已经更改了 WP8 中的代码以匹配 Shawn Kendrot 的解决方案。我在这里面临的问题是我收到一条Not Found错误消息：

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);

我得到一个：

{System.UnauthorizedAccessException：无效的跨线程访问。在 MS.Internal.XcpImports.CheckThread() 在 MS.Internal.XcpImports.MessageBox_ShowCore(String messageBoxText, String caption, UInt32 type) 在 System.Windows.MessageBox.ShowCore(String messageBoxText, String caption, MessageBoxButton button) 在 System.Windows .MessageBox.Show(String messageBoxText) at Notify.Logic.WebServices.<>c_ DisplayClass2.b _1(IAsyncResult ar2) at System.Net.Browser.ClientHttpWebRequest.<>c_ DisplayClass1d.b _1b(Object state2)}

当我尝试做 `MessageBox.Show(ex.Message);

更新

我已经解决了 MessageBox.Show 错误消息的问题。

该webRequest.Headers对象具有以下内容：

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

4

1 回答 1

3

您的SightingRequest 为空，因为您没有发送任何数据。要使用 WebRequest 发送数据，您需要使用 BeginGetRequestStream 方法。此方法允许您打包数据。

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);
于 2013-09-22T14:52:32.080 回答