学步园

原帖地址:

http://topic.csdn.net/u/20111108/09/07216bf6-d888-43c5-9192-87ffa4b4892c.html

public class Flag
    {
        public static bool IsOpen { set; get; }
        public static object lockObj = new object();
    }

public delegate void FunDelegate();
        public delegate void SetValue(int i);
        public delegate void CloseForm();

        private void Form3_Load(object sender, EventArgs e)
        {
            Flag.IsOpen = true;
        }


        private void button1_Click(object sender, EventArgs e)
        {
            FunDelegate fundelegate = new FunDelegate(FunProc);
            AsyncCallback callback = new AsyncCallback(CallBack);
            IAsyncResult result = fundelegate.BeginInvoke(callback, "处理结束");
        }

        public void CallBack(IAsyncResult result)
        {
            MessageBox.Show(result.AsyncState.ToString());
        }

        public void FunProc()
        {
            for (int i = 0; i < 5000; i++)
            {
                Thread.Sleep(100);

                if (Flag.IsOpen && this != null && !this.IsDisposed)
                {
                    lock (Flag.lockObj)
                    {
                        if (Flag.IsOpen && this != null && !this.IsDisposed)
                        {
                            this.Invoke(new SetValue(SetListBox), i);
                        }
                        else
                        {
                            break;
                        }
                    }
                }
                else
                {
                    break;
                }
            }
        }

        public void SetListBox(int i)
        {
            if (Flag.IsOpen && this != null && !this.IsDisposed)
            {
                listBox1.Items.Add(i);                
            }
        }


        private void Form3_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (Flag.IsOpen)
            {
                Flag.IsOpen = false;

                if (Monitor.TryEnter(Flag.lockObj, 2000))
                {
                    Monitor.Exit(Flag.lockObj);
                }
                else
                {
                    e.Cancel = true;
                    new Thread(() =>
                    {
                        Thread.Sleep(1000);
                        this.Invoke(new CloseForm(() => this.Close()));
                    }).Start();
                }
            }
        }

 详细过程晚上补.