1、创建一个WinForm程序，名称随便。
2、新建一个类叫"Color衡痕贤伎sProgressBar"，代码如下：using System;using System.C泠贾高框ollections.Generic;using System.Drawing;namespace System.Windows.Forms{ public class ColorsProgressBar : ProgressBar { private List<Color> colors; public ColorsProgressBar() : base() { base.SetStyle(ControlStyles.UserPaint, true); this.Minimum = 0; colors = new List<Color>(); Random r = new Random(); for (int i = 0; i < this.Maximum - this.Minimum; i++) { this.Colors.Add(Color.FromArgb(r.Next(0, 256), r.Next(0, 256), r.Next(0, 256))); } } public List<Color> Colors { get { return colors; } set { if (value.Count != this.Maximum - this.Minimum || value.Count == 0) { throw new ArgumentException("System.Windows.Forms.ColorProgressBar.Colors.Count不等于System.Windows.Forms.ColorProgressBar.Maximum-System.Windows.Forms.ColorProgressBar.Minimum或者等于0"); } colors = value; } } protected override void OnPaint(PaintEventArgs e) { SolidBrush brush = null; Pen pen = null; Rectangle bounds = new Rectangle(0, 0, base.Width, base.Height); e.Graphics.FillRectangle(new SolidBrush(this.BackColor), 1, 1, bounds.Width - 2, bounds.Height - 2); bounds.Height -= 4; bounds.Width = ((int)(bounds.Width * (((double)base.Value) / ((double)base.Maximum)))) - 4; for (int i = 0; i < this.Value; i++) { e.Graphics.FillRectangle(new SolidBrush(this.Colors[i]), new Rectangle((this.Width / (this.Maximum - this.Minimum)) * i, 0, this.Width / (this.Maximum - this.Minimum), this.Height)); } } }}
3、生成一下，再到Windows窗体拖入ColorsProgress幞洼踉残Bar和一个Button，Button上显示"启动"。
4、给显示"启动"的Button注册点击事件，代码如下图所示：
5、启动应用程序，点击"启动"就可以看到进度条的颜色一直在变化啦~~~
