form1.cs

这是.net2005学习不可缺少的教程

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 ThreadWinApp
{
    public partial class Form1 : Form
    {
        private Thread trd;
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            MessageBox.Show("This is the main thread");
        }

        private void ThreadTask()
        {
            int stp;
            int newval;
            Random rnd = new Random();

            while (true)
            {
                stp = this.progressBar1.Step * rnd.Next(-1, 2);
                newval = this.progressBar1.Value + stp;

                if (newval > this.progressBar1.Maximum)
                    newval = this.progressBar1.Maximum;
                else if (newval < this.progressBar1.Minimum)
                    newval = this.progressBar1.Minimum;

                this.progressBar1.Value = newval;

                Thread.Sleep(100);
            }
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            Thread trd = new Thread(new ThreadStart(this.ThreadTask));
            trd.IsBackground = true;
            trd.Start();

        }

    }
}