socket programming: sending data/receiving data to socket after pause

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I have this gui where I used TcpClient to connect to a a device. Everything works except when I am sending/receiving data after a long pause. For example, lets say I send "hello" to the device and then wait 60 seconds before I send it again. I would get

C#

InvalidOperationException

or

C#

IOException

which make sense because the socket times out when its not doing anything for a long period. Is there a way to prevent this from happening or do I have to catch those exceptions and re-establish the connection?

thanks in advance

Posted 14-Dec-12 14:46pm

dbzx734

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Jibesh 14-Dec-12 21:30pm

Check this socket.SendTimeout property bydefault it is set to inifinite wait.are you modifying this value ?

dbzx734 14-Dec-12 21:32pm

no i did not, it wasnt even set in my code. so what do you suggest?

2 solutions

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malaugh · Answer 1 · 2012-12-14T15:36:00

Solution 1

You need to re-establish connection. Typically a TCP connection will time out after 30 seconds. Most TCP programs are coded with the sequence open - send - close.

Posted 14-Dec-12 15:36pm

malaugh

Comments

dbzx734 14-Dec-12 21:49pm

I thought about that, but my gui has a connect button and disconnect button because each send sequence, I want to be able to send multiple data.

malaugh · Answer 2 · 2012-12-15T09:55:00

Solution 2

You may want to rethink your gui. Just have a send button, and when the user hits it, connect - send the data - then disconnect.

Posted 15-Dec-12 9:55am

malaugh