.Net ramblings
# Wednesday, 23 June 2004
WSE 2.0 send DIME attachments from client TO a web service

I wanted to improve the performance of my winforms app sending binary data to a web service, so i chose to upgrade to WSE 2.0 and use the DIME specification. 

I checked out the examples in the docs, but only found one with a web service sending an attachment to a client.  i wanted it the other way around.  i tried to modify it to suit my own needs, but couldn't get it to work. (in the end i had the response and request contexts mixed up). I searched high and low online and finally found that there is a sample as part of the WSE full installation which contains just what i wanted.  I could find no mention of this sample in the docs, so I am posting it here.

The code below shows the important methods, on the client and on the server.  It assumes a web project and winforms project both set up for WSE2.0. 

// this is part of a winforms application with an openfiledialog
private void btnUpload_Click(object sender, System.EventArgs e)
  if(this.openFileDialog1.ShowDialog() == DialogResult.OK)
    DimeAttachment dimeAttach = new DimeAttachment("image/gif", TypeFormat.MediaType,this.openFileDialog1.FileName);
    ws = new TestService.Test();
    MessageBox.Show("Upload successful");
    MessageBox.Show("No file selected");

// web service method...
public void ReceiveImage(string filename)
  // Reject any requests which are not valid SOAP requests
  if (RequestSoapContext.Current == null)
    throw new ApplicationException("Only SOAP requests are permitted.");
  if (RequestSoapContext.Current.Attachments.Count == 0)
    throw new ApplicationException("No attachments were sent with the message.");

    FileStream f = System.IO.File.OpenWrite(Server.MapPath("Upload/" + filename));
    Stream s = RequestSoapContext.Current.Attachments[0].Stream;
    byte[] bytes = new byte[s.Length];
    s.Read(bytes, 0, bytes.Length);
    f.Write(bytes, 0, bytes.Length);
  catch(Exception ex)
    throw ex; // or log it...

Wednesday, 23 June 2004 13:08:19 (GMT Daylight Time, UTC+01:00)  #    Comments [1]  .Net General

Wednesday, 21 July 2004 19:19:36 (GMT Daylight Time, UTC+01:00)
I was browsing the net to find out more info on DIME, and your weblog was highly informational. Hope you continue to maintain it.

Please login with either your OpenID above, or your details below.
Home page

Comment (Some html is allowed: a@href@title, strike) where the @ means "attribute." For example, you can use <a href="" title=""> or <blockquote cite="Scott">.  

[Captcha]Enter the code shown (prevents robots):

Live Comment Preview