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   源码介绍

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利用定时器、双缓存在窗体上画图，并实现动画

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;

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

        private void button1_Click(object sender, EventArgs e)
        {//启动有窗体定时器
            if (this.timer11.Enabled == false)
            {
                this.timer11.Start();
            }
            x = 10;
            y = 50;
        }
        private void button2_Click(object sender, EventArgs e)
        {//关闭有窗体定时器
            this.timer11.Stop();
        }
        private void timer1_Tick(object sender, EventArgs e)
        {
           
            x = x   2;
            w = 40;
            h = 40;

            Bitmap bmp = new Bitmap(this.Width, this.Height-50);
            Graphics buffergraphics = Graphics.FromImage(bmp);
            Color bc = this.BackColor;

            buffergraphics.FillRectangle(new SolidBrush(bc), 0, 0, this.Width - 1, this.Height - 1);
            buffergraphics.DrawEllipse(Pens.Blue, x, y, w, h);
            //4、将内存画布画到窗口中
            Graphics g; 
            g = this.CreateGraphics();
            g.DrawImage(bmp,   0,   50); 
            
        }

        public int x, y, w, h;
        private void Form1_Load(object sender, EventArgs e)
        {//初始化图形数据
            this.timer11.Interval = 20;
            x = 10;
            y = 50;
             
        }

        private void panel1_Paint(object sender, PaintEventArgs e)
        {

        }
    }
}