如何将位图从C＃WinForms应用程序发送到asp.net页

Question

我想将位图从Windows窗体应用程序（C＃）发布到ASP.NET页并将其保存到服务器。我尝试了base64，但无法成功解码。这是我来自Windows Forms Application（C＃）的代码：

GC.Collect();

Rectangle bounds = Screen.GetBounds(Point.Empty);
        using (Bitmap bitmap = new Bitmap(bounds.Width, bounds.Height))
        {
            using (Graphics g = Graphics.FromImage(bitmap))
            {
                g.CopyFromScreen(Point.Empty, Point.Empty, bounds.Size);
            }

            System.IO.MemoryStream stream = new System.IO.MemoryStream();
           // bitmap.Save(stream, System.Drawing.Imaging.ImageFormat.Jpeg);

           // byte[] imageBytes = stream.ToArray();

            ImageCodecInfo jgpEncoder = GetEncoder(ImageFormat.Jpeg);

            // Create an Encoder object based on the GUID
            // for the Quality parameter category.
            System.Drawing.Imaging.Encoder myEncoder =
                System.Drawing.Imaging.Encoder.Quality;

            // Create an EncoderParameters object.
            // An EncoderParameters object has an array of EncoderParameter
            // objects. In this case, there is only one
            // EncoderParameter object in the array.
            EncoderParameters myEncoderParameters = new EncoderParameters(1);

            EncoderParameter myEncoderParameter = new EncoderParameter(myEncoder,
                20L);
            myEncoderParameters.Param[0] = myEncoderParameter;
            bitmap.Save(stream, jgpEncoder,
                myEncoderParameters);
           byte[] imageBytes = stream.ToArray();
              string base64String = Convert.ToBase64String(imageBytes);
              var helloWorldString = "SSKEY="+base64String;
              var array = Encoding.ASCII.GetBytes(helloWorldString);
              HttpWebRequest request =     
 (HttpWebRequest)WebRequest.Create("http://localtest.yagosinc.com/SupportView/postScreen.aspx?key="+Environment.UserDomainName);
              request.Method = "POST";
              request.ContentLength = array.Length;
              request.ContentType = "application/x-www-form-urlencoded";
              var Url = "";

              using (Stream postdata = request.GetRequestStream())
              {
                  postdata.Write(array, 0, array.Length);
              }