Can't Create New Thread Using Method Call

Question

I have a Problem with multithreadding. VS2010 don't accept "sendCom(IP, com)". Error: expacted method name

 private void sendCom(String com) { //send command int i=0; String IP; foreach (var item in checkedListBox1.CheckedItems) { Console.WriteLine(item.ToString()); IP = getIP(item); theThreads[i] = new Thread(new ThreadStart( sendCom(IP, com) )); i++; } } private void sendCom(String IP, String com) { theSSHclass.RunSingleCom(IP, com); }

ThreadStart wraps a method to execute, the not result of execution. — Tim M.
– Tim M., Commented Apr 4, 2013 at 23:57
Note this had nothing to do with windows forms, and almost nothing to do with threading. — John Saunders
– John Saunders, Commented Apr 5, 2013 at 0:58

bmm6o · Accepted Answer · 2014-02-27 22:13:34Z

Consider the expression

new ThreadStart( sendCom(IP, com) );

It says to call sendCom and pass the result to the ThreadStart constructor. That's not what you want - you want ThreadStart to have a reference to the sendCom function, and have the new thread pass in IP and com.

The typical way to do this is like Hans Passant says:

var t = new Thread(new ThreadStart(() => sendCom(IP, com))); t.Start();

Here you're constructing an anonymous function, that when invoked, will call sendCom. You then pass this to the new Thread. The new thread will invoke it.

thanks, ist works fine, but the thread must be started with thethread.Start();

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