Thursday, August 30, 2007

Avoid Cross Threaded Calls..

I was developing a TCP/IP based Chat Application.

When i was sending the data from the server to the client using send method of Socket Class Object and on the client side i was receiving the data using the BeginReceive andEndReceive method of socket class.
Till here it's functioning properly but when i assigned the content sent by the server to the textbox .NET throws an exception
*Cross Threaded call are not allowed. ThisText box is defined in some other thread.*

I searched a lot on this to find the solution.

Finally I got the solution.

The solution is :-

The solution is to write
Control.CheckForIllegalCrossThreadCalls =false;
in Page Load
CheckForIllegalCrossThreadCalls is a static propertyin the load event handler of the main form.

(Don't worry if this property doesn't appear in the intellisense menu )

This problem happens because a thread other than the one who created a control is attempting to modify its properties.


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