C#桌面两球体随机移动效果源码

新建winform窗体，添加timer并绑定事件

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace test.winForm
{
    public partial class Form4 : Form
    {
        public Form4()
        {
            InitializeComponent();
        }

        private void Form4_Load(object sender, EventArgs e)
        {
            //设置窗体初始位置
            this.Location = new Point(0, 0);
            //去掉窗体边框
            this.FormBorderStyle = FormBorderStyle.None;
            //设置窗体大小
            this.Size = new Size(300, 300);
            //设置窗体背景颜色
            this.BackColor = Color.Pink;
            //设置窗体不透明度
            this.Opacity = 2.9;
            //将窗体变为圆形
            GraphicsPath path = new GraphicsPath();
            path.AddEllipse(0, 0, this.Width, this.Height);
            this.Region = new Region(path);
            //设置计时器频率
            timer1.Interval = 10;
            //开启计时器
            timer1.Start();
        }
        //定义两个局部变量
        int x = 8;
        int y = 8;
        Random ys = new Random();

        private void timer1_Tick(object sender, EventArgs e)
        {
            //窗体距容器左距离
            this.Left += x;

            //窗体距容器上距离
            this.Top += y;
            //窗体碰到容器下方和上方
            if (this.Top + this.Height >= Screen.PrimaryScreen.WorkingArea.Height || this.Top <= 0)
            {
                //取反，加y变成减y
                y = -y;
                this.BackColor = Color.FromArgb(ys.Next(256), ys.Next(256), ys.Next(256));
            }
            //窗体碰到容器右方和左方
            if (this.Left + this.Width >= Screen.PrimaryScreen.WorkingArea.Width || this.Left <= 0)
            {
                //取反，加x变成减x
                x = -x;
                this.BackColor = Color.FromArgb(ys.Next(0, 255), ys.Next(0, 255), ys.Next(0, 255));
            }
        }
    }
}

　　再加一个窗体，同样添加timer和绑定事件

using System;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Windows.Forms;

namespace test.winForm
{
    public partial class Form3 : Form
    {
        public Form3()
        {
            InitializeComponent();
        }

        private void Form3_Load(object sender, EventArgs e)
        {
            //设置窗体初始位置
            this.Location = new Point(0, 0);
            //去掉窗体边框
            this.FormBorderStyle = FormBorderStyle.None;
            //设置窗体大小
            this.Size = new Size(200, 200);
            //设置窗体背景颜色
            this.BackColor = Color.Red;
            //设置窗体不透明度
            this.Opacity = 2.9;
            //将窗体变为圆形
            GraphicsPath path = new GraphicsPath();
            path.AddEllipse(0, 0, this.Width, this.Height);
            this.Region = new Region(path);
            //设置计时器频率
            timer1.Interval = 10;
            //开启计时器
            timer1.Start();
            Form4 fm2 = new Form4();
            fm2.Show();
        }

        //定义两个局部变量
        int x = 7;
        int y = 7;
        Random ys = new Random();

        private void timer1_Tick(object sender, EventArgs e)
        {
            //窗体距容器左距离
            this.Left += x;

            //窗体距容器上距离
            this.Top += y;
            //窗体碰到容器下方和上方
            if (this.Top + this.Height >= Screen.PrimaryScreen.WorkingArea.Height || this.Top <= 0)
            {
                //取反，加y变成减y
                y = -y;
                this.BackColor = Color.FromArgb(ys.Next(256), ys.Next(256), ys.Next(256));
            }
            //窗体碰到容器右方和左方
            if (this.Left + this.Width >= Screen.PrimaryScreen.WorkingArea.Width || this.Left <= 0)
            {
                //取反，加x变成减x
                x = -x;
                this.BackColor = Color.FromArgb(ys.Next(0, 255), ys.Next(0, 255), ys.Next(0, 255));
            }
        }
    }
}

启动方法中设置启动窗体为form3运行起来即可