新建

在工具箱中找到 Timer，拖拽使用，將Name改為dt，Interval（單位：毫秒）改為500

然後編寫程式碼

 string key_name = "start";   //記錄鍵盤狀態
        Label[] l_b = new Label[30];   //貪吃蛇身體陣列
        Random r = new Random();    //隨機數
        int a = 0, b = 0;           //變數，記錄座標
        public Form1()
        {
            InitializeComponent();
        }
        private
 
 void Form1_Load(object sender, EventArgs e)
        {
            //設定初始介面狀態
            this.Top = 120;
            this.Left = 120;
            this.Width = 800;
            this.Height = 600;
            this.BackColor = Color.Black;
            //造 蛇 身體，長度為5
            for (int i = 0; i < 5; i++)
            {
                Label lb = new
 
 Label();
                lb.Width = lb.Height = 20;
                lb.Top = 400;
                lb.Left = 400 - i * 20;
                lb.BackColor = Color.Red;
                lb.Text = "O";
                lb.Font = new System.Drawing.Font("宋體", 18);
                lb.Tag = i;
                l_b[i] = lb;
                this
 
.Controls.Add(lb);
            }
            //控制元件Timer
            dt.Tick += new EventHandler(dt_Tick);
            //鍵盤敲擊事件
            this.KeyDown += new KeyEventHandler(Form1_KeyDown);

            snake_food();    //造 蛇 的食物函式
            dt.Start();    //Timer 開始
        }
        void dt_Tick(object sender, EventArgs e)
        {
            int x_1, y_1;
            x_1 = l_b[0].Left;
            y_1 = l_b[0].Top;
            if (key_name == "start")     //鍵盤狀態處於初始狀態
            {
                l_b[0].Left = x_1 + 20;
                snake_move(x_1, y_1);
            }
            if (key_name == "Right")   //鍵盤狀態處於  向右 狀態
            {
                l_b[0].Left = x_1 + 20;
                snake_move(x_1, y_1);
            }
            if (key_name == "Up")     //鍵盤狀態處於  向上  狀態
            {
                l_b[0].Top = y_1 - 20;
                snake_move(x_1, y_1);
            }
            if (key_name == "Down")   //鍵盤狀態處於  向下  狀態
            {
                l_b[0].Top = y_1 + 20;
                snake_move(x_1, y_1);
            }
            if (key_name == "Left")    //鍵盤狀態處於   向左 狀態
            {
                l_b[0].Left = x_1 - 20;
                snake_move(x_1, y_1);
            }
            //          穿牆設定
            if (x_1 > 800)            
            {
                l_b[0].Left = 0; ;
            }
            if (x_1 < 0)
            {
                l_b[0].Left = 800;
            }
            if (y_1 > 600)
            {
                l_b[0].Top = 0;
            }
            if (y_1 < 0)
            {
                l_b[0].Left = 600;
            }
            //每動一次，判斷是否與食物重合
            eat_time();
        }
        //敲擊鍵盤響應
        void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            //記錄蛇頭座標
            int x_1, y_1;
            x_1 = l_b[0].Left;
            y_1 =l_b[0].Top;
            //獲取按了什麼鍵
            key_name = e.KeyCode.ToString();

            if (e.KeyCode.ToString() == "Right")   //向右
            {
                l_b[0].Left= x_1 + 20;
                snake_move(x_1, y_1);
            }
            if (e.KeyCode.ToString() == "Up")    //向上
            {
                l_b[0].Top= y_1 - 20;
                snake_move(x_1, y_1);
            }
            if (e.KeyCode.ToString() == "Down")     //向下
            {
                l_b[0].Top= y_1 + 20;
                snake_move(x_1, y_1);
            }
            if (e.KeyCode.ToString() == "Left")    //向左
            {
                l_b[0].Left= x_1 - 20;
                snake_move(x_1, y_1);
            }
            //每按一次，判斷是否與食物重合
            eat_time();
        }
        //吃的一瞬間
        void eat_time()
        {
            double x1 = 20, y1 = 20, x2 = 20, y2 = 20;
            foreach (Label lb in this.Controls)
            {
                if (lb.Tag.ToString() == "food".ToString())
                {
                    x2 = lb.Left;
                    y2 = lb.Top;
                }
                if (lb.Tag.ToString() == "0".ToString())
                {
                    x1 = lb.Left;  //左
                    y1 = lb.Top;  //上
                }
            }
            if (x2==x1&&y2==y1)
            {
                snake_eat();
                foreach (Label lb in this.Controls)
                {
                    if (lb.Tag.ToString() == "food".ToString())
                    {
                        lb.Top = r.Next(1, 30) * 20;
                        lb.Left = r.Next(1, 30) * 20;
                    }
                }
            }
        }
        //蛇移動函式
        /*主要思路：保證 蛇 的每一塊，移動的下次方向為這塊（第N塊）的前一塊（N-1）*/

        void snake_move(int x_1, int y_1)
        {
            int xx = 0;
            int yy = 0;
            for (int i = 1; l_b[i] != null; i++)
            {
                if (i >= 3)
                {
                    xx = a;
                    yy = b;
                }
                if (i == 1)
                {
                    xx =l_b[i].Left;
                    yy = l_b[i].Top;
                    l_b[i].Left= x_1;
                    l_b[i].Top= y_1;
                }
                else
                {
                    a =l_b[i].Left;
                    b = l_b[i].Top;
                    l_b[i].Left= xx;
                    l_b[i].Top= yy;
                }
            }
        }
        //製造食物
        void snake_food()
        {
            double xx = l_b[0].Left;
            double yy = l_b[0].Top;
            Label lb = new Label();
            lb.Width = 20;
            lb.Height = 20;
            lb.Top= r.Next(1, 30) * 20;
            lb.Left= r.Next(1, 30) * 20;
            lb.Tag = "food";
            lb.BackColor = Color.Yellow;
            this.Controls.Add(lb);
        }

        //吃過的食物，變為 蛇 的一部分
        void snake_eat()
        {
            int i = 0;
            for (; l_b[i] != null; i++)
                ;
            Label lb = new Label();
            lb.Width = lb.Height = 20;
            lb.Top = b;
            lb.Left = a;
            lb.BackColor = Color.Red;
            lb.Text = "O";
            lb.Font = new System.Drawing.Font("宋體", 18);
            lb.Tag = i;
            l_b[i] = lb;
            this.Controls.Add(lb);
        }