thread.abort() not working

[djones7936]

Hello,

I've got a run away thread!

I am making a very simple program which accepts connections on post 80 (HTTP), sends an HTTP header and a short webpage, then closes the connection. (Essentially, a very simple web server.) I have a TcpListener in a separate class which is accessed using a thread. I'm using a thread because normally, the user interface freezes until there is a request for a webpage.
While the program "listens", the code in the thread stays at the tcpListener.AcceptSocket() line, and waits for a webpage request.

The program appears to run okay, and the webpage displays properly, but the thread still runs after the close button is pressed. I used the thread.Abort(); command, but the thread seems to keep going as if the command was never executed.

I put thread.Abort(); in the Dispose subroutine of my program. When the program closes, the thread should abort/stop, but it doesn't.

Is thread.Abort() supposed to stop then destroy the thread? Has anyone experienced this problem, or know what might cause it?

Thanks for any input!
-Dave

 

[SlantyOD]

Are you using the declared name of the thread to abort? Ie

Thread m_Thread;
ThreadStart m_ThreadStart = new ThreadStart(myMethod);
m_Thread = new Thread(m_ThreadStart);
m_Thread.Abort();

Something along those lines worked just fine for my program. Also make sure that the thread is declared in such a way that it is accesible from wherever you're trying to abort it.

SlantyOD

 

[djones7936]

I tried your code, and the code works, (I added in m_Thread.Start(); and that works too ). But when I include the tcplistr.AcceptSocket(); line of code, the thread keeps running after the program stops :-(.

I experimented with your code. I declared the Thread m_Thread; and ThreadStart m_ThreadStart; at the top of the class "Form1" (so all the methods can access it). I stored "myMethod" in a separate class called "Class1." myMethod consisted of an endless while loop. At Form1_Load, I used the code:
m_ThreadStart = new ThreadStart(Class1.myMethod);
m_Thread = new Thread(m_ThreadStart);
m_Thread.Start();

In Form1.Dispose I put:
m_Thread.Abort();

When I start the program the thread starts, when I stop the program, the thread aborts like normal. The code works as it is suppose to.

If I change the code in Class1.myMethod() to:
TcpListener tcplistr = new TcpListener(80);
tcplistr.Start();
Socket socketForClient = tcplistr.AcceptSocket();
When I run the program, the thread does not stop when the program is "closed". It seems the thread is stuck on that line of code and isn't unloading as I would like. This problem does not occur when I comment out the tcplistr.AcceptSocket(); line, though I need that code for the program to work.

Maybe I should use a different method instead of tcplistr.AcceptSocket() or use a different approach than using TcpListener?

-Dave

http://home.attbi.com/~djones7936/index.htm