贪吃蛇 WPF

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Threading;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace WPFSnake
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        private DispatcherTimer timer;

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

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

        public MainWindow()
        {
            InitializeComponent();

        }

        private void panel_Loaded(object sender, RoutedEventArgs e)
        {
        }

        private void Window_Loaded_1(object sender, RoutedEventArgs e)
        {
            cells = new List<BodyCell>();

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

                BodyCell cell = new BodyCell();
                double left = i * 10;
                double top = panel.Height / 2;
                Canvas.SetLeft(cell, left);
                Canvas.SetTop(cell, top);

                //cell.Margin.Top= panel.Height / 2;

                cells.Add(cell);
                panel.Children.Add(cell);
            }

            food = new Image();
            food.Height = 10;
            food.Width = 10;
            BitmapImage pic = new BitmapImage(new Uri("Image/bg.jpg", UriKind.Relative));
            food.Source = pic;
            Random rY = new Random();
            double ftop = rY.Next(0, 30) * 10;
            Random rX = new Random();
            double fleft = rX.Next(0, 30) * 10;
            //food.Margin = new Thickness(fleft, ftop, 0, 0);
            Canvas.SetTop(food, ftop);
            Canvas.SetLeft(food, fleft);
            panel.Children.Add(food);

            timer = new DispatcherTimer();
            timer.Tick += timer_Tick;
            timer.Interval = TimeSpan.FromMilliseconds(100);
            timer.Start();
        }

        private void timer_Tick(object sender, EventArgs args)
        {
            SnakeProcess();

            if (GameOver())
            {
                MessageBox.Show("Game Over.");
                timer.Stop();
            }
        }

        private void SnakeProcess()
        {
            #region  移动
            #region 版本1
            for (int i = bodyCount - 1; i >= 0; i--)
            {
                if (cells[i].direct == Direction.Right)
                {
                    //cells[i].Left += 10;
                    Canvas.SetLeft(cells[i], Canvas.GetLeft(cells[i]) + 10);
                }
                else if (cells[i].direct == Direction.Left)
                {
                    //cells[i].Left -= 10;
                    Canvas.SetLeft(cells[i], Canvas.GetLeft(cells[i]) - 10);
                }
                else if (cells[i].direct == Direction.Up)
                {
                    //cells[i].Top -= 10;
                    Canvas.SetTop(cells[i], Canvas.GetTop(cells[i]) - 10);
                }
                else if (cells[i].direct == Direction.Down)
                {
                    //cells[i].Top += 10;
                    Canvas.SetTop(cells[i], Canvas.GetTop(cells[i]) + 10);
                }
            }
            for (int i = 0; i < bodyCount - 1; i++)
            {
                cells[i].direct = cells[i + 1].direct;
            }

            #endregion

            #region 版本2

            //for (int i = bodyCount - 1; i > 0; i--)
            //{
            //    cells[i - 1] = cells[i];
            //}
            //if (cells[bodyCount - 1].direct == Direction.Right)
            //{
            //    cells[bodyCount - 1].Margin.Left += 10;
            //}
            //else if (cells[bodyCount - 1].direct == Direction.Left)
            //{
            //    cells[bodyCount - 1].Left -= 10;
            //}
            //else if (cells[bodyCount - 1].direct == Direction.Up)
            //{
            //    cells[bodyCount - 1].Top -= 10;
            //}
            //else if (cells[bodyCount - 1].direct == Direction.Down)
            //{
            //    cells[bodyCount - 1].Top += 10;
            //}
            #endregion
            #endregion

            #region 吃食物
            EatFood();
            #endregion
        }

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

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

        private void EatFood()
        {
            BodyCell head = cells[bodyCount - 1];
            if (Canvas.GetTop(cells[bodyCount - 1]) == Canvas.GetTop(food) && Canvas.GetLeft(cells[bodyCount - 1]) == Canvas.GetLeft(food))
            {
                BodyCell cell = new BodyCell();
                panel.Children.Add(cell);
                cell.direct = head.direct;
                if (head.direct == Direction.Up)
                {
                    //cell.Top = head.Top - 10;
                    //cell.Left = head.Left;
                    Canvas.SetTop(cell, Canvas.GetTop(head) - 10);
                    Canvas.SetLeft(cell, Canvas.GetLeft(head));
                }
                else if (head.direct == Direction.Down)
                {
                    //cell.Top = head.Top + 10;
                    //cell.Left = head.Left;
                    Canvas.SetTop(cell, Canvas.GetTop(head) + 10);
                    Canvas.SetLeft(cell, Canvas.GetLeft(head));

                }
                else if (head.direct == Direction.Left)
                {
                    //cell.Top = head.Top;
                    //cell.Left = head.Left - 10;
                    Canvas.SetTop(cell, Canvas.GetTop(head));
                    Canvas.SetLeft(cell, Canvas.GetLeft(head) - 10);
                }
                else if (head.direct == Direction.Right)
                {
                    //cell.Top = head.Top;
                    //cell.Left = head.Left + 10;
                    Canvas.SetTop(cell, Canvas.GetTop(head));
                    Canvas.SetLeft(cell, Canvas.GetLeft(head) + 10);
                }
                cells.Add(cell);

                bodyCount++;
                //lbl_Score.Text = (bodyCount - 5).ToString();

                panel.Children.Remove(food);

                Random rY = new Random();
                //food.Top = rY.Next(0, 30) * 10;
                Canvas.SetTop(food, rY.Next(0, 30) * 10);
                Random rX = new Random();
                //food.Left = rX.Next(0, 30) * 10;
                Canvas.SetLeft(food, rX.Next(0, 30) * 10);
                panel.Children.Add(food);
            }
        }

        private void Window_KeyDown_1(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Up && cells[bodyCount - 1].direct != Direction.Down)
            {
                //direct = Direction.Up;
                cells[bodyCount - 1].direct = Direction.Up;
            }
            else if (e.Key == Key.Left && cells[bodyCount - 1].direct != Direction.Right)
            {
                //direct = Direction.Left;
                cells[bodyCount - 1].direct = Direction.Left;
            }
            else if (e.Key == Key.Down && cells[bodyCount - 1].direct != Direction.Up)
            {
                //direct = Direction.Down;
                cells[bodyCount - 1].direct = Direction.Down;
            }
            else if (e.Key == Key.Right && cells[bodyCount - 1].direct != Direction.Left)
            {
                //direct = Direction.Right;
                cells[bodyCount - 1].direct = Direction.Right;
            }
            if (e.Key == Key.Space)
            {
                if (timer.IsEnabled)
                {
                    timer.Stop();
                }
                else
                {
                    timer.Start();
                }
            }
        }
    }

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

        public BodyCell()
            : base()
        {
            this.Width = 10;
            this.Height = 10;
            direct = Direction.Right;
            BitmapImage pic = new BitmapImage(new Uri("Image/bg.jpg", UriKind.Relative));
            this.Source = pic;
            
        }
    }
    public enum Direction
    {
        Up,
        Down,
        Left,
        Right
    }
}