C# WinForm控件TrackBar与ProgressBar及Timer的用法

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

namespace WindowsApplication1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (timer1.Enabled == true)
            {
                timer1.Enabled = false;
                button1.Text = "开始";
            }
            else
            {
                timer1.Enabled = true;
                button1.Text = "停止";
            }
        }

        private void trackBar1_Scroll(object sender, EventArgs e)
        {
            //使用trackBar1调整步进速度,不能为零
            timer1.Interval = Convert.ToInt16(5000 / trackBar1.Value);
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            if (this.progressBar1.Value == this.progressBar1.Maximum)
            {
                this.progressBar1.Value = this.progressBar1.Minimum;
            }
            else
            {
                //主要是这个函数，步进
                this.progressBar1.PerformStep();
            }
            //计算百分比
            int intPercent;
            intPercent = 100 * (this.progressBar1.Value - this.progressBar1.Minimum) / (this.progressBar1.Maximum - this.progressBar1.Minimum);
            label1.Text = Convert.ToInt16(intPercent).ToString() + "%";
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            this.progressBar1.Maximum = 1000;
            this.progressBar1.Step = 10;
        }
    }
}