随手写 --- 贪吃蛇

public class BodyCell : PictureBox
    {
        public Direction direct
        { get; set; }

        public BodyCell()
            : base()
        {
            this.Width = 10;
            this.Height = 10;
            this.BackColor = Color.Black;
            direct = Direction.Right;
        }
    }


using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

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

        public int bodyCount = 5;
        public Direction direct = Direction.Right;

        //public BodyCell[] cells;
        public List<BodyCell> cells;
        public PictureBox food;

        private void Form1_Load(object sender, EventArgs e)
        {
            cells = new List<BodyCell>();

            for (int i = 0; i < bodyCount; i++)
            {

                BodyCell cell = new BodyCell();
                cell.Left = i * 10;
                cell.Top = panel1.Height / 2;
                cells.Add(cell);
                panel1.Controls.Add(cell);
            }

            food = new PictureBox();
            food.BackColor = Color.Black;
            food.Height = 10;
            food.Width = 10;
            Random rY = new Random();
            food.Top = rY.Next(0, 30) * 10;
            Random rX = new Random();
            food.Left = rX.Next(0, 30) * 10;
            panel1.Controls.Add(food);
        }

        private void Timer_Process_Tick(object sender, EventArgs e)
        {
            SnakeProcess();

            if (GameOver())
            {
                Timer_Process.Enabled = false;
                MessageBox.Show("Game Over");
            }
        }

        private void SnakeProcess()
        {
            #region  移动
            for (int i = bodyCount - 1; i >= 0; i--)
            {
                if (cells[i].direct == Direction.Right)
                {
                    cells[i].Left += 10;
                }
                else if (cells[i].direct == Direction.Left)
                {
                    cells[i].Left -= 10;
                }
                else if (cells[i].direct == Direction.Up)
                {
                    cells[i].Top -= 10;
                }
                else if (cells[i].direct == Direction.Down)
                {
                    cells[i].Top += 10;
                }
            }

            for (int i = 0; i < bodyCount - 1; i++)
            {
                cells[i].direct = cells[i + 1].direct;
            }
            #endregion

            #region 吃食物
            EatFood();
            #endregion
        }

        private bool GameOver()
        {
            bool isOver = false;
            //撞墙
            if (cells[bodyCount - 1].Top == 0 && cells[bodyCount - 1].direct == Direction.Up)
            {
                isOver = true;
            }
            if (cells[bodyCount - 1].Top == 300 && cells[bodyCount - 1].direct == Direction.Down)
            {
                isOver = true;
            }
            if (cells[bodyCount - 1].Left == 0 && cells[bodyCount - 1].direct == Direction.Left)
            {
                isOver = true;
            }
            if (cells[bodyCount - 1].Left == 300 && cells[bodyCount - 1].direct == Direction.Right)
            {
                isOver = true;
            }

            //撞自己
            for (int i = bodyCount - 2; i >= 0; i--)
            {
                if (cells[i].Top == cells[bodyCount - 1].Top && cells[i].Left == cells[bodyCount - 1].Left)
                {
                    isOver = true;
                    break;
                }
            }
            return isOver;
        }

        private void EatFood()
        {
            BodyCell head = cells[bodyCount - 1];
            if (cells[bodyCount - 1].Top == food.Top && cells[bodyCount - 1].Left == food.Left)
            {
                BodyCell cell = new BodyCell();
                panel1.Controls.Add(cell);
                cell.direct = head.direct;
                if (head.direct == Direction.Up)
                {
                    cell.Top = head.Top - 10;
                    cell.Left = head.Left;
                }
                else if (head.direct == Direction.Down)
                {
                    cell.Top = head.Top + 10;
                    cell.Left = head.Left;

                }
                else if (head.direct == Direction.Left)
                {
                    cell.Top = head.Top;
                    cell.Left = head.Left - 10;
                }
                else if (head.direct == Direction.Right)
                {
                    cell.Top = head.Top;
                    cell.Left = head.Left + 10;
                }
                cells.Add(cell);

                bodyCount++;

                panel1.Controls.Remove(food);

                Random rY = new Random();
                food.Top = rY.Next(0, 30) * 10;
                Random rX = new Random();
                food.Left = rX.Next(0, 30) * 10;
                panel1.Controls.Add(food);
            }
        }

        private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Up && cells[bodyCount - 1].direct != Direction.Down)
            {
                //direct = Direction.Up;
                cells[bodyCount - 1].direct = Direction.Up;
            }
            else if (e.KeyCode == Keys.Left && cells[bodyCount - 1].direct != Direction.Right)
            {
                //direct = Direction.Left;
                cells[bodyCount - 1].direct = Direction.Left;
            }
            else if (e.KeyCode == Keys.Down && cells[bodyCount - 1].direct != Direction.Up)
            {
                //direct = Direction.Down;
                cells[bodyCount - 1].direct = Direction.Down;
            }
            else if (e.KeyCode == Keys.Right && cells[bodyCount - 1].direct != Direction.Left)
            {
                //direct = Direction.Right;
                cells[bodyCount - 1].direct = Direction.Right;
            }
        }
    }

    public enum Direction
    {
        Up,
        Down,
        Left,
        Right
    }
}