c#红绿灯窗体程序编写

以下是一个简单的红绿灯窗体程序示例：

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

namespace TrafficLight
{
    public partial class Form1 : Form
    {
        private Timer timer;
        private int count = 0;

        public Form1()
        {
            InitializeComponent();

            // 初始化定时器
            timer = new Timer();
            timer.Interval = 1000; // 1秒
            timer.Tick += new EventHandler(Timer_Tick);
        }

        private void Timer_Tick(object sender, EventArgs e)
        {
            count++;

            if (count == 1)
            {
                // 红灯亮，其它灯灭
                pictureBoxRed.Image = Properties.Resources.RedOn;
                pictureBoxYellow.Image = Properties.Resources.YellowOff;
                pictureBoxGreen.Image = Properties.Resources.GreenOff;
            }
            else if (count == 6)
            {
                // 红灯灭，黄灯亮
                pictureBoxRed.Image = Properties.Resources.RedOff;
                pictureBoxYellow.Image = Properties.Resources.YellowOn;
                pictureBoxGreen.Image = Properties.Resources.GreenOff;
            }
            else if (count == 8)
            {
                // 红灯灭，黄灯灭，绿灯亮
                pictureBoxRed.Image = Properties.Resources.RedOff;
                pictureBoxYellow.Image = Properties.Resources.YellowOff;
                pictureBoxGreen.Image = Properties.Resources.GreenOn;
            }
            else if (count == 14)
            {
                // 绿灯灭，黄灯亮
                pictureBoxRed.Image = Properties.Resources.RedOff;
                pictureBoxYellow.Image = Properties.Resources.YellowOn;
                pictureBoxGreen.Image = Properties.Resources.GreenOff;
            }
            else if (count == 16)
            {
                // 黄灯灭，红灯亮
                pictureBoxRed.Image = Properties.Resources.RedOn;
                pictureBoxYellow.Image = Properties.Resources.YellowOff;
                pictureBoxGreen.Image = Properties.Resources.GreenOff;
                count = 0;
            }
        }

        private void buttonStart_Click(object sender, EventArgs e)
        {
            // 启动定时器
            timer.Start();
        }

        private void buttonStop_Click(object sender, EventArgs e)
        {
            // 停止定时器
            timer.Stop();

            // 灯全部灭
            pictureBoxRed.Image = Properties.Resources.RedOff;
            pictureBoxYellow.Image = Properties.Resources.YellowOff;
            pictureBoxGreen.Image = Properties.Resources.GreenOff;

            // 计数器清零
            count = 0;
        }
    }
}

在窗体设计器中添加三个 PictureBox 控件，并分别设置红灯、黄灯和绿灯的图片资源。在窗体上添加两个 Button 控件，分别用于启动和停止定时器。

在 Timer_Tick 事件处理程序中，根据计数器的值来控制灯的状态。当计数器为 1 时，红灯亮，其它灯灭；当计数器为 6 时，红灯灭，黄灯亮；当计数器为 8 时，红灯灭，黄灯灭，绿灯亮；当计数器为 14 时，绿灯灭，黄灯亮；当计数器为 16 时，黄灯灭，红灯亮，并将计数器清零。

在启动和停止按钮的 Click 事件处理程序中，分别启动和停止定时器，并将所有灯都灭掉，计数器清零。