VB Screen Sharing

VB Screen Sharing

• SharePointing

  Thanks for your speedy reply.

  At the client side how can I get the image and display it as the background image on a form

  P.S. Thanks for all the help I've received from you in the past. It is all much appreciated.

  
  
  

• Pavan Contractor

  no worries Robin, I'm glad I could be of assistance to you, and its always a pleasure!

  in regards to recieving it and doing the processing, funny once again - I've done this but in a cheeky way. Pretty much I just sent a message from server -> Client, something like "startTransmission" or whatever. the client then keeps filling its memorystream full of data recieved until it gets the "endTransmission" command. From then, we simply just use the Image.FromStream() method to read the image stored in the memoryStream object, and set that to the background image....

  Me.BackgroundImage = Image.FromStream(theMemStream)

  so whilst you are recieving the data in bytes() array on the client, you keep writing it into a memorystream until you recieve that command, and you keep checking on every data you recieved for that command.

  alternatively I guess you could just try to keep reading and appending to the memorystream until no more data left to be read (but remember TCP/IP works in a funny yet incredible way where if you send data, its not recieved in the way you sent it. That's normal).

  Different ways of going about doing things

  
  
  

• Chryso

  OK i made a memorystream, and checked if an image was about to be sent like this:

  Dim bytes(client.ReceiveBufferSize) As Byte

  client.GetStream.Read(bytes, 0, CInt(client.ReceiveBufferSize))

  Dim clientdata As Char() = Encoding.ASCII.GetString(bytes).Trim("").ToCharArray

  If clientdata = "BeginTransmission" Then

  ReceivingImage = True

  This part works fine and sets ReceivingImage to true when an image is going to be sent. Then when data is received:

  ImageBuffer.Write(buffer, 0, buffer.Length)

  But I can't figure out when the image transmission ends. Any ideas

  
  
  

• lord_8

  funny I've done this! Take a look at this on creating screen shot:

  http://forums.microsoft.com/MSDN/ShowPost.aspx PostID=841156&SiteID=1

  with that you can save it to any file format you like.

  to send it over tcp connection, when saving just give it the network stream/socket stream to send it to instead of the filename

  
  
  

• Gerrit L

  well basically once you have sent the image from the server/client, just send it a string afterwards to mark the end of transmission like "EndTransmission" I'm sure there is a better way that I can't think right now but generally doing it this way, it is possible

• send start transmission command

• reciever prepares to keep reading data until no more data left to be read

• server sends data

• client recieves data and checks if current data recieve is a marker of end transmission

• server finishes sending data and sends end transmission marker

• client recieves end transmission marker and begins to assemble the image