Question

I have button call this code

private void but_Click(object sender, EventArgs e)
{
    Thread My_Thread = new Thread(() => Send_File());
    My_Thread.IsBackground = true;
    My_Thread.Start();
}

I want a way to kill

My_Thread

from the function

Send_File()

please help me how to fix it ??? 🙁

Answer 1

Just declare your thread globally like any other variable (eg. int or string) you are using in different functions:

Thread My_Thread; //goes before your functions/main method

and then use it:

private void but_Click(object sender, EventArgs e)
{
    My_Thread = new Thread(Send_File);
    My_Thread.IsBackground = true;
    My_Thread.Start();
}

and kill it:

private void Send_File()
{
    MyThread.Abort();
}

If you are talking about Send_File running in the thread, just exit it for example using break, stop all loops to complete it.

EDIT:
As Austin Salonen has stated in his comment this would overwrite the thread reference. My suggestion would be using a thread list.

public List<Thread> ThreadList=new List<Thread>(); //goes before your functions/main method (public for use in other classes)

and use it:

private void but_Click(object sender, EventArgs e)
{
    Thread My_Thread = new Thread(Send_File);
    My_Thread.IsBackground = true;
    My_Thread.Start();
    int ThreadIndex = ThreadList.Count; //remember index
    ThreadList.Add(My_Thread);
}

You just need to remember the index of the list to create a reference to the thread again.

To abort a thread just use its index:

ThreadList[ThreadIndex].Abort();
ThreadList[ThreadIndex] = null;

or just let the thread return.