threading?

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Hi all,

I am new to c# and threading.

I want to call more than two functions at the same time . So i am uisng threads

private void button1_Click(object sender, EventArgs e)
{
Thread t = new Thread(new ThreadStart(connect));
t.Start();
Thread t1 = new Thread(new ThreadStart(connect1));
t1.Start();

}//click

when run like this , it is working.

If it is like this i have to repeat the code again.
What i thought is , i will change the same function with different parameter
so i did like this

private void button1_Click(object sender, EventArgs e)
{
Thread t = new Thread(new ThreadStart(connectPara("sp1")));
t.Start();
Thread t1 = new Thread(new ThreadStart(connectPara("sp2")));
t1.Start();

}//click
i got this errors

Method name expected
The name 't' does not exist in the current context

1, I may need to call more than 5 or 6 threads later. So i am planning to use the same function with different parameters. what i need is to run functions with parameters in the thread
How can do with the threading.

2, One more doubt is how do i know that the the thread is executed fully or it got stucked some where in the middle

Can anybody help me resolve this issue

Posted 7-Dec-09 23:37pm

nevincm

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3 solutions

Solution 3

If you want to pass parameters to a function in a thread use this:

Thread th = new Thread(delegate()
{
      connectPara("sp1");
});
th.Start();
Thread th1 = new Thread(delegate()
{
      connectPara("sp2");
});
th1.Start();

Posted 8-Dec-09 1:24am

Nitin S

v2

Solution 1

1. The best way to pass parameters on thread start is to create a class with the variables and the method you would like to expose and then, invoke the method of the object instance (which holds the variables) http://www.yoda.arachsys.com/csharp/threadstart.html)

2. The status of the thread can be checked to determine if the thread competed or not. (Introduction to Threads in C#)

Posted 8-Dec-09 0:16am

raelango

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Nicholas Butler · Accepted Answer · 2009-12-08T01:00:00

1) You can use a ParameterizedThreadStart and use the overload of Thread.Start that takes a parameter.

void connectPara( object o )
{
  var s = o as string; // this will be "sp1"

  ...
}

...
var t = new Thread( connectPara );
t.Start( "sp1" );
...

2) There are many ways to communicate between threads. If you just want to check if a thread has completed, you could use Thread.IsAlive or Thread.ThreadState.

Nick