问题描述

程序媛小白求助：C#贪吃蛇精灵游戏

我编了一个贪吃蛇的游戏，代码如下。编译无错误，但运行后蛇不会动啊~我真的真的不知道问题出在哪儿。多谢各位大神指教~
using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Timers;

namespace GreedySnake3
{

public partial class Form2 : Form
{
    Snake snack1 = new Snake(4);
    private System.Drawing.Color foodColor = System.Drawing.Color.Red;
    Bean food = new Bean();
    bool play = false;
    bool foodDraw = false;
    private void Form2_Load(object sender, EventArgs e)
    {
           pictureBox1.Paint += pictureBox1_Paint;
           timer1.Tick+=timer1_Tick;
    }

    public Form2()
    {
        InitializeComponent();
    }

    private void button1_Click(object sender, EventArgs e)
    {
        play = true;
        this.timer1.Enabled = true;
        this.timer1.Interval = 500;

    }
    private void pictureBox1_Paint(object sender, PaintEventArgs e)
    {
        Graphics g = e.Graphics;
        DrawGameFrame(e.Graphics);   

        snack1.DrawSnack(e.Graphics);   

        if (foodDraw == false)
        {
            food.GetFoodPoint();
            foodDraw = true;
        }
        food.DrawFood(e.Graphics);   

        if (play)
        {
            snack1.SnackMoce(e.Graphics);

        }
        if (this.timer1.Enabled == true)
        {
            this.button1.Focus();
        }

    }

    private void timer1_Tick(object sender, EventArgs e)
    {
        if (play)
        {
            snack1.Addsnack();
        }
        if (snack1.HeadPoint == food.Origin)
        {

            foodDraw = false;
            snack1.Addsnack();

        }
        if (snack1.Diedif())
        {
            timer1.Enabled = false;
            play = false;
            MessageBox.Show("Game Over!");

        }
    }

    public void DrawGameFrame(Graphics g)
    {
        for (int i = 0; i < this.pictureBox1.Width; i += 10)
            for (int j = 0; j < this.pictureBox1.Height; j += 10)
            {
                g.FillEllipse(Brushes.LightGreen, i, j, 10, 10);
            }
    }

    private void button1_KeyUp(object sender, KeyEventArgs e)
    {
        if (e.KeyCode == Keys.A  && snack1.Direction != 1)
            snack1.Direction = 2;
        else if (e.KeyCode == Keys.D && snack1.Direction != 2)
            snack1.Direction = 1;
        else if (e.KeyCode == Keys.W && snack1.Direction != 4)
            snack1.Direction = 3;
        else if (e.KeyCode == Keys.S && snack1.Direction != 3)
            snack1.Direction = 4;

    }

    private void button2_Click(object sender, EventArgs e)
    {
        this.Close();
    }

}
public class Bean
{
    Point origin=new Point(100,100);
    public Point Origin
    {
        get { return origin; }
        set { origin = value; }
    }
    public void GetFoodPoint()
        {
            Random random = new Random();
            int x = random.Next(1, 40)*10;
            int y = random.Next(1, 30)*10;
            origin = new Point(x, y);
        }
        public void DrawFood(Graphics g)
        {
            g.FillEllipse(Brushes.Red, origin.X, origin.Y, 10, 10);
        }
    }

public class Snake
{
    public Point startPoint = new Point(0, 0);
    Point addPoint;
    public ArrayList snackPoint = new ArrayList();
    Point headPoint;
    public Point HeadPoint
    {
        get { return headPoint; }
        set { headPoint = value; }
    }
    int direction = 1;
    public int Direction
    {
        get { return direction; }
        set { direction = value; }
    }

    public Snake(int lenth)
    {
        for (int i = 0; i < lenth; i++)
        {
            snackPoint.Add(startPoint);
            if (i == lenth - 1)
            {
                HeadPoint = startPoint;
                return;
            }
            startPoint = new Point(startPoint.X + 10, startPoint.Y);
        }
    }
    public void DrawSnack(Graphics g)
    {
        for (int i = 0; i < snackPoint.Count; i++)
        {
            g.FillEllipse(Brushes.Blue, ((Point)snackPoint[i]).X, ((Point)snackPoint[i]).Y, 10, 10);
        }
    }

    public void Addsnack()
    {
        if (direction == 1)
            addPoint = new Point(headPoint.X + 10, headPoint.Y);
        else if (direction == 2)
            addPoint = new Point(headPoint.X - 10, headPoint.Y);
        else if (direction == 3)
            addPoint = new Point(headPoint.X, headPoint.Y - 10);
        else if (direction == 4)
            addPoint = new Point(headPoint.X, headPoint.Y + 10);
        snackPoint.Add(addPoint);
        headPoint = addPoint;
    }

    public void RemoveSnackNode()
    {
        snackPoint.RemoveAt(0);
    }

    public void SnackMoce(Graphics g)
    {
        DrawSnack(g);
        RemoveSnackNode();
    }

    public bool Diedif()
    {
        for (int i = 0; i < snackPoint.Count - 1; i++)
        {
            if ((Point)snackPoint[i] == headPoint)
                return true;
        }

        if (headPoint.X < 0 || headPoint.X > 400 || headPoint.Y < 0 || headPoint.Y > 300)
            return true;
        return false;
    }
}

}

解决方案

pictureBox1 的paint 事件不会时时触发 在timer1_tick中添加 pictureBox1.Refresh(); 让它定时触发paint 重新绘制自己
private void timer1_Tick(object sender, EventArgs e)
{
if (play)
{
pictureBox1.Refresh();
snack1.Addsnack();

        }
        if (snack1.HeadPoint == food.Origin)
        {
            pictureBox1.Refresh();
            foodDraw = false;
            snack1.Addsnack();

        }
        if (snack1.Diedif())
        {
            pictureBox1.Refresh();
            timer1.Enabled = false;
            play = false;
            MessageBox.Show("Game Over!");

        }
    }

解决方案二：

你的代码是直接复制粘贴的么？选中你的PictureBox1，在属性窗格里点闪电按钮，看Paint事件关联给pictureBox1_Paint了没有。

解决方案三：

你的timer好像没有start

解决方案四：

没有错误么