多线程访问winform控件示例

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Threading;

namespace WindowsFormsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private Thread t;
        private void button1_Click(object sender, EventArgs e)
        {
            if (t != null)
            {
                t.Abort();
            }
            t = new Thread(Run);
            t.Start();
        }
        private delegate void deleChange(String text);
        private void ChangeLable(String text)
        {
            label1.Text = text;
        }
        private delegate void deleHide(bool isHide);
        private void Hide(bool isHide)
        {
            label2.Visible = !isHide;
        }
        private void Run()
        {
            deleChange dcl = new deleChange(ChangeLable);
            deleHide dh = new deleHide(Hide);
            int count = 100;
            while (count > 0)
            {
                if (count % 4 == 0)
                {
                    label1.Invoke(dcl, "Start...");
                }
                else if (count % 4 == 1)
                {
                    label1.Invoke(dcl, "Start..");
                }
                else if (count % 4 == 2)
                {
                    label1.Invoke(dcl, "Start.");
                }
                else
                {
                    label1.Invoke(dcl, "Start");
                }

                if (count % 2 == 0)
                {
                    label2.Invoke(dh, true);
                }
                else
                {
                    label2.Invoke(dh, false);
                }
                Thread.Sleep(200);
                count--;
            }
        }

        private void Form1_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (t != null && t.IsAlive)
            {
                if (MessageBox.Show("yes or no?", "exit", MessageBoxButtons.YesNo) == DialogResult.Yes)
                {
                    t.Abort();
                }
                else
                {
                    e.Cancel = true;
                }
            }
        }
    }
}