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

namespace WinThreadNew
{
    public partial class WinThreadNew : Form
    {
        int pro = 0;
        Thread backWork = null;  //后台线程
        public WinThreadNew()
        {
            InitializeComponent();
        }

        private void btnStart_Click(object sender, EventArgs e)
        {
            backWork = new Thread(new ThreadStart(doWork)); //创建新的线程
            backWork.Start();   //启动线程
        }

        public delegate void DelegateUpdateUIPro();
        private void doWork()
        {
            for (int i = 0; i < 100; i++ )
            {
                pro++;
                UpdateUIPro();  //在新线程中更新ui
                Thread.Sleep(100);
            }
            
        }

        private void UpdateUIPro()
        {
           //更新ui时需要判断InvokeRequired 属性
            if (this.InvokeRequired)
            {
                this.BeginInvoke(new DelegateUpdateUIPro(UpdateUIPro));
            } 
            else
            {
                this.lblPro.Text = pro.ToString() + "%";
            }
        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            this.backWork.Abort();
            this.backWork.Join();
        }
    }
}