多线程例子

source from:http://www.codeproject.com/KB/cs/workerthread.aspx

后台处理类

    public class BackWorker
    {
        public delegate void DelegateAddString(String s);
        public delegate void DelegateThreadFinished();

        public DelegateAddString m_DelegateAddString;
        public DelegateThreadFinished m_DelegateThreadFinished;

        // Main thread sets this event to stop worker thread:
        public ManualResetEvent m_EventStopThread;

        // Worker thread sets this event when it is stopped:
        public ManualResetEvent m_EventThreadStopped;

        public BackWorker()
        {
            // initialize events
            m_EventStopThread = new ManualResetEvent(false);
            m_EventThreadStopped = new ManualResetEvent(false);
        }

        public void Start()
        {
            int i;
            String s;

            for (i = 1; i <= 101; i++)
            {
                // make step
                s = "Step number " + i.ToString() + " executed";

                Thread.Sleep(1000);

                // Make synchronous call to main form.
                // MainForm.AddString function runs in main thread.
                // To make asynchronous call use BeginInvoke
                //m_form.Invoke(m_form.m_DelegateAddString, new Object[] { s });
                this.m_DelegateAddString(s);

                // check if thread is cancelled
                if (m_EventStopThread.WaitOne(0, true))
                {
                    // clean-up operations may be placed here
                    // ...

                    // inform main thread that this thread stopped
                    m_EventThreadStopped.Set();

           &