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VB6: Winsock Trivia Game Problem

Posted on 2004-09-28
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Last Modified: 2013-11-12
i made a trivia game for a friend. basically, the server sends questions to all the clients and who ever answers them first, gets a point. the problem is, sometimes winsock sends data a the same time. also, when the client disconnects, then tries to reconnect again, the server gets an error. i dont want to use "on error resume next" because that sometimes causes complications. is there any way to fix this winsock problem?

my code for sending data is

for a = 1 to wsk.ubound
  if wsk(a).state = sckconnected then
    wsk(a).senddata strData
  end if
next a

now, it send the data correctly, but sometimes it sends them at the same time, and the String gets combined together.

------------------------------------------
Sub 1:
strData = "Chat///Goodbye World"
for a = 1 to wsk.ubound
  if wsk(a).state = sckconnected then
    wsk(a).senddata strData
  end if
next a

Sub 2:
strdata = "Com///Hello world"
for a = 1 to wsk.ubound
  if wsk(a).state = sckconnected then
    wsk(a).senddata strData
  end if
next a
------------------------------------------

when the client receives the data, it gets this:
"Chat///Goodbye WorldCom///Hello World".

could someone please help? if someone needs the source for both client and server, i would upload somewhere. thank you!
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Question by:Gamemaster328
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2 Comments
 
LVL 86

Accepted Solution

by:
Mike Tomlinson earned 500 total points
ID: 12175048
Hi Gamemaster328,

What you need to do is create an end of message marker.  It looks you are using /// as a parameter delimiter which is a great start.  You need to the same thing for the end of a message so you you know when you have received a partial, entire or multiple messages in on DaraArrival event.

Below is a link to a chat system that demonstrates the idea.  In it I have used Chr(0) as a parameter delimeter and Chr(1) as a command delimeter.  Study the DataArrival() and processInputs() subroutines carefully.

http://www.experts-exchange.com/Programming/Programming_Languages/Visual_Basic/VB_Controls/Q_20870693.html

Regards,

Idle_Mind
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Author Comment

by:Gamemaster328
ID: 12186330
wow. that was amazing! it worked well. thank you. i changed /// to chr(1) and the end delimiter to chr(5) i havn't tested what all chr()s are, but im pretty sure i will be using more and more of the chr functions. =) thank you!
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