如何在C＃中从Web API响应解析多部分表单数据

Question

我需要解析一个Web API响应数据，其中包含一个JSON响应和一个纯文本图像。我试图用--Boundary分割此响应。拆分后，我可以轻松解析JSON数据，但无法生成图像文件。我也尝试在线将Base64纯文本生成到Image Generator，但是失败了。

响应流如下所示：

 --BOUNDARY
  Content-Type: application/json; name="Live_Info"

 json data

--BOUNDARY
Content-Type: image/jpeg; name="Live_data"

Live image plain text data 
ex: ÿØÿÛ C 
    
    

    

    #%$""!&+7/&)4)!"0A149;>>>%.DIC<H7=>;ÿÛ C
    
    ;("(;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;ÿÀ
--BOUNDARY

这是我尝试过的代码

HttpWebRequest webrequestlive = 
(HttpWebRequest)WebRequest.Create(request_uri_live);

try
{
                webrequestlive.KeepAlive = false;
                HttpWebResponse webresponselive = 
(HttpWebResponse)webrequestlive.GetResponse();
                if (webresponselive.StatusCode == HttpStatusCode.OK)
                {
                    Stream stream = webresponselive.GetResponseStream();

                    StreamReader reader = new StreamReader(stream);
                    var html_body = reader.ReadToEnd();

                    byte[] imageBytes;

                    string[] split = html_body.Split(new string[] { "-- 
BOUNDARY\r\n" }, StringSplitOptions.None);

                    LiveImageRetrievalCommandJOSNParser.Rootobject obj1 = 



JsonConvert.DeserializeObject<
LiveImageRetrievalCommandJOSNParser.Rootobject> (split[0]);

                    byte[] imagedata = Encoding.UTF8.GetBytes(split[2]);

                    using (var imagestream = new MemoryStream(imagedata ))
                    {
                        using (BinaryReader br = new 
 BinaryReader(imagestream))
                        {
                            imageBytes = br.ReadBytes(500000);
                            br.Close();
                        }
                        //Image LiveImage = Image.FromStream(imagestream);
                        Image liveimage = (Bitmap)((new 
 ImageConverter()).ConvertFrom(imageBytes));

                        liveIMage.Image = liveimage;
                    }

                    stream.Close();
                    webresponselive.Close();
                }
                else
                {
                    webrequestlive.Abort();
                    Thread.Sleep(5000);
                    ErrorLog("Bad Request for getting Live Image");
                }
            }
            catch (Exception exer)
            {
                webrequestlive.Abort();
                Thread.Sleep(5000);
                ErrorLog(exer.Message);
            }

解析后，此流的实际结果是JSON数据和图片。