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   源码介绍

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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
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;
using System.Windows.Threading;
namespace WpfApplication5
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        double x = 800;
        double y = 600;
        string key_name = "start";
        Border[] bdr = new Border[30];
        Random r = new Random();
        DispatcherTimer dt = new DispatcherTimer();
        double a = 0, b = 0;
        public MainWindow()
        {
            InitializeComponent();
            this.Top = 100; this.Left = 200;
            this.Width = x; this.Height = y;

            this.Background = Brushes.Black;

            dt.Interval = TimeSpan.FromMilliseconds(500);
            dt.Tick  = new EventHandler(dt_Tick);
            this.KeyDown  = new KeyEventHandler(lol_KeyDown);
            snack_start();
            snake_food();
            dt.Start();
        }
        void dt_Tick(object sender, EventArgs e)
        {
            double x_1, y_1;
            x_1 = Canvas.GetLeft(bdr[0]);
            y_1 = Canvas.GetTop(bdr[0]);
            if (key_name == "start")
            {
                Canvas.SetLeft(bdr[0], x_1   20);
                snake_move(x_1, y_1);
            }
            if (key_name == "Right")
            {
                Canvas.SetLeft(bdr[0], x_1   20);
                snake_move(x_1, y_1);
            }
            if (key_name == "Up")
            {
                Canvas.SetTop(bdr[0], y_1 - 20);
                snake_move(x_1, y_1);
            }
            if (key_name == "Down")
            {
                Canvas.SetTop(bdr[0], y_1   20);
                snake_move(x_1, y_1);
            }
            if (key_name == "Left")
            {
                Canvas.SetLeft(bdr[0], x_1 - 20);
                snake_move(x_1, y_1);
            }
            if(x_1>x)
            {
                Canvas.SetLeft(bdr[0],0);
            }
            if(x_1<0)
            {
                Canvas.SetLeft(bdr[0],x);
            }
            if(y_1>y)
            {
                Canvas.SetTop(bdr[0],0);
            }
            if(y_1<0)
            {
                Canvas.SetTop(bdr[0],y);
            }
            eat_time();
        }
        void lol_KeyDown(object sender, KeyEventArgs e)
        {
            double x_1, y_1;
            x_1 = Canvas.GetLeft(bdr[0]);
            y_1 = Canvas.GetTop(bdr[0]);
            key_name = e.Key.ToString();
            if (e.Key.ToString() == "Right")
            {
                Canvas.SetLeft(bdr[0], x_1   20);
                snake_move(x_1, y_1);
            }
            if (e.Key.ToString() == "Up")
            {
                Canvas.SetTop(bdr[0], y_1 - 20);
                snake_move(x_1, y_1);
            }
            if (e.Key.ToString() == "Down")
            {
                Canvas.SetTop(bdr[0], y_1   20);
                snake_move(x_1, y_1);
            }
            if (e.Key.ToString() == "Left")
            {
                Canvas.SetLeft(bdr[0], x_1 - 20);
                snake_move(x_1, y_1);
            }
            eat_time();
        }

        private void eat_time()
        {
            double x1 = 20, y1 = 20, x2 = 20, y2 = 20, a1 = 20, b1 = 20;
            foreach (Border bo in lol.Children)
            {
                if (bo.Tag.ToString() == "food".ToString())
                {
                    x2 = Canvas.GetLeft(bo);
                    y2 = Canvas.GetTop(bo);
                }
                if (bo.Tag.ToString() == "0".ToString())
                {
                    x1 = Canvas.GetLeft(bo);  //左
                    y1 = Canvas.GetTop(bo);  //上
                    a1 = Canvas.GetBottom(bo);   //底
                    b1 = Canvas.GetRight(bo);  //右
                }
            }
            if ((x1 == x2 && y1 == y2) || (x1 == y2 && y1 == x2) || (a1 == x2 && b1 == y2) || (a1 == y2 && b1 == x2))
            {
                snake_eat();
                foreach (Border bo in lol.Children)
                {
                    if (bo.Tag.ToString() == "food".ToString())
                    {
                        Canvas.SetTop(bo, r.Next(1, 30) * 20);
                        Canvas.SetLeft(bo, r.Next(1, 30) * 20);
                    }
                }
            }
        }
        void snack_start()
        {
            for (int i = 0; i < 5; i  )
            {
                Border bor = new Border();
                bor.Width = 20;
                bor.Height = 20;
                Canvas.SetLeft(bor, 400-i*20);
                Canvas.SetTop(bor, 400);
                bor.Background = Brushes.Red;
                bor.CornerRadius = new CornerRadius(6);
                bor.Tag = i;
                bdr[i] = bor;
                lol.Children.Add(bor);
            }
        }
        void snake_move(double x_1, double y_1)
        {
          /*  double bor_hei, bor_wid;
            bor_wid = bdr[0].Width;
            bor_hei = bdr[0].Height;*/
            double xx = 0;
            double yy = 0;
            for (int i = 1; bdr[i] != null; i  )
            {
                if (i >= 3)
                {
                    xx = a;
                    yy = b;
                }
                if (i == 1)
                {
                    xx = Canvas.GetLeft(bdr[i]);
                    yy = Canvas.GetTop(bdr[i]);
                    Canvas.SetLeft(bdr[1], x_1);
                    Canvas.SetTop(bdr[1], y_1);
                }
                else
                {
                    a = Canvas.GetLeft(bdr[i]);
                    b = Canvas.GetTop(bdr[i]);
                    Canvas.SetLeft(bdr[i], xx);
                    Canvas.SetTop(bdr[i], yy);
                }
            }
        }
        void snake_food()
        {
            double xx = Canvas.GetLeft(bdr[0]);
            double yy = Canvas.GetTop(bdr[0]);
            Border bd = new Border();
            bd.Width = 20;
            bd.Height = 20;
            Canvas.SetTop(bd, r.Next(1, 30) * 20);
            Canvas.SetLeft(bd, r.Next(1, 30) * 20);
            bd.Tag = "food";
            bd.Background = Brushes.Yellow;
            lol.Children.Add(bd);
        }
        void snake_eat()
        {
            int i = 0;
            for (; bdr[i] != null; i  ) 
                ;
            Border bd = new Border();
            bd.CornerRadius = new CornerRadius(6);
            bd.Width = 20;
            bd.Height = 20;
            bd.Tag = i;
            bd.Background = Brushes.Red;
            bdr[i] = bd;
            Canvas.SetLeft(bdr[i], a);
            Canvas.SetTop(bdr[i], b);
            lol.Children.Add(bdr[i]);
        }
    }
}