C# HttpStreamContent抛出System.ExecutionEngineeException

我目前正试图通过我的网络服务上传一张图片。我有一段代码：

public async Task<Webservice> editProfile(List<KeyValuePair<string, string>> values, byte[] image)
        {
            String strUrl = String.Format("http://********/nl/webservice/abc123/members/update");
            var HttpClientUpload = new HttpClient();
            HttpMultipartFormDataContent requestUploadContent = new HttpMultipartFormDataContent();

           Stream streamImage = new System.IO.MemoryStream(image);
            HttpStreamContent streamContent = new HttpStreamContent(streamImage.AsInputStream());

            requestUploadContent.Add(streamContent, "myFile", "image.jpg");
            foreach (var keyValuePair in values)
            {
                requestUploadContent.Add(new HttpStringContent(keyValuePair.Value), keyValuePair.Key);
            }

            HttpResponseMessage responseLogin = await HttpClientUpload.PostAsync(new Uri(strUrl), requestUploadContent);
            responseLogin.EnsureSuccessStatusCode();
            if (responseLogin.StatusCode == Windows.Web.Http.HttpStatusCode.Ok && responseLogin.Content != null)
            {
                var data = new Webservice { Status = responseLogin.StatusCode };
                data.Data = await responseLogin.Content.ReadAsStringAsync();
                Debug.WriteLine(data.Data);
                return data;
            }
            return new Webservice { Status = new Windows.Web.Http.HttpStatusCode() };
        }

有人能帮忙吗，已经为这个问题挣扎了好几天了

提前谢谢

编辑

我已更改了我的功能：

public async Task<Webservice> editProfile(List<KeyValuePair<string, string>> values, byte[] image)
        {
            try
            {
                using (IsolatedStorageFile iso = IsolatedStorageFile.GetUserStoreForApplication())
                {
                    using (IsolatedStorageFileStream stream = iso.OpenFile("image.jpg", FileMode.Open, FileAccess.Read))
                    {
                        String strUrl = String.Format("http://membr.sanmax.be/nl/webservice/abc123/members/update");

                        HttpMultipartFormDataContent requestUploadContent = new HttpMultipartFormDataContent();

                        //Stream streamImage = new System.IO.MemoryStream(stream);
                        HttpStreamContent streamContent = new HttpStreamContent(stream.AsInputStream());

                        requestUploadContent.Add(streamContent, "picture", "photo.jpg");
                        foreach (var keyValuePair in values)
                        {
                            requestUploadContent.Add(new HttpStringContent(keyValuePair.Value), keyValuePair.Key);
                        }

                        HttpResponseMessage responseLogin = await httpClient.PostAsync(new Uri(strUrl), requestUploadContent);
                        responseLogin.EnsureSuccessStatusCode();
                        if (responseLogin.StatusCode == Windows.Web.Http.HttpStatusCode.Ok && responseLogin.Content != null)
                        {
                            var data = new Webservice { Status = responseLogin.StatusCode };
                            data.Data = await responseLogin.Content.ReadAsStringAsync();
                            Debug.WriteLine(data.Data);
                            return data;
                        }
                    }
                }     
            }
            catch (Exception e)
            {
                Debug.WriteLine(e);
            }

            return new Webservice { Status = new Windows.Web.Http.HttpStatusCode() };
        }

---

异常消息是什么？未知模块中发生类型为“System.ExecutionEngineeException”的未处理异常。是否存在任何内部异常？奇怪的是，有时它不会失败，有时它会因上述异常而失败。“内部异常”是什么意思？.NET中的@StefGeelen异常具有

InnerException

属性。有时它是空的，但有时它有一个值（另一个异常，它本身可以有自己的

InnerException

），这对确定发生了什么至关重要。通常，一个过于通用的异常会明确地告诉您检查

InnerException

。

public async Task<Webservice> editProfile(List<KeyValuePair<string, string>> values, byte[] image)
        {
            try
            {
                using (IsolatedStorageFile iso = IsolatedStorageFile.GetUserStoreForApplication())
                {
                    using (IsolatedStorageFileStream stream = iso.OpenFile("image.jpg", FileMode.Open, FileAccess.Read))
                    {
                        String strUrl = String.Format("http://membr.sanmax.be/nl/webservice/abc123/members/update");

                        HttpMultipartFormDataContent requestUploadContent = new HttpMultipartFormDataContent();

                        //Stream streamImage = new System.IO.MemoryStream(stream);
                        HttpStreamContent streamContent = new HttpStreamContent(stream.AsInputStream());

                        requestUploadContent.Add(streamContent, "picture", "photo.jpg");
                        foreach (var keyValuePair in values)
                        {
                            requestUploadContent.Add(new HttpStringContent(keyValuePair.Value), keyValuePair.Key);
                        }

                        HttpResponseMessage responseLogin = await httpClient.PostAsync(new Uri(strUrl), requestUploadContent);
                        responseLogin.EnsureSuccessStatusCode();
                        if (responseLogin.StatusCode == Windows.Web.Http.HttpStatusCode.Ok && responseLogin.Content != null)
                        {
                            var data = new Webservice { Status = responseLogin.StatusCode };
                            data.Data = await responseLogin.Content.ReadAsStringAsync();
                            Debug.WriteLine(data.Data);
                            return data;
                        }
                    }
                }     
            }
            catch (Exception e)
            {
                Debug.WriteLine(e);
            }

            return new Webservice { Status = new Windows.Web.Http.HttpStatusCode() };
        }

WinRT information: Response status code does not indicate success: 413 (Request Entity Too Large).
System.Exception: Request entity too large (413).