C＃HttpClient 4.5分段表单数据上传

C＃HttpClient 4.5分段/表单数据上传

我的结果看起来像这样：

public static async Task<string> Upload(byte[] image){     using (var client = new HttpClient())     {         using (var content =  new MultipartFormDataContent("Upload----" + DateTime.Now.ToString(CultureInfo.InvariantCulture)))         {  content.Add(new StreamContent(new MemoryStream(image)), "bilddatei", "upload.jpg");   using (      var message =          await client.PostAsync("http://www.directupload.net/index.php?mode=upload", content))   {       var input = await message.Content.ReadAsStringAsync();       return !string.IsNullOrWhiteSpace(input) ? Regex.Match(input, @"http://w*.directupload.net/images/d*/w*.[a-z]{3}").Value : null;   }          }     }}