在C#中如何设置label的默认值

Posted 2023-03-16

在label标签的属性栏中，设置label的Text属性就可以了··· 参考技术A label.Text

利用c# 编写贪吃蛇游戏如何修改label的属性

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　　新建项目，选择c#语言，Windows程序
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　　右边的窗口中有 form1.cs ,它有两种查看方式，可以使用 设计的方式，也可以使用代码的方式，代码的方式查看如下。
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　　设置主窗体的属性，属性工具栏也在右边，设置的属性如图所示。
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　　切换到设计模式下面 打开工具箱，拖一个 pictureBox控件到主窗口。同时设置pictureBox的属性，把属性名称设置为pBox
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　　向主窗口添加菜单，拖动菜单控件到主窗体，并设置三个子菜单item，并设置三个子菜单的属性名称。
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　　向主窗体添加定时器，并设置定时器的间隔时间等属性
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　　到目前为止界面基本上就画完了，下面的工作就是要实现 Snake 类，这个类的目的就是完成贪吃蛇的核心功能。首先创建一个Snake类。并完成相应的函数。添加新类可以使用Shift + Alt +c 添加。代码如下，（看不清的话我会将源代码放到网上，下载链接在下面）
　　using System;using System.Collections.Generic;using System.Linq;using System.Text;namespace Snake class Point int x, y; public int Y get return y; set y = value; public int X get return x; set x = value; public Point() x = y = 0; public Point(int _x, int _y) x = _x; y = _y; class Snake private List<Point> sQ = new List<Point>(); private Point food; private Random rand; internal Point Food get return food; set food = value; internal List<Point> SQ get return sQ; private int direct; // 0 down 1 left 2 up 3 right private int xNum; private int yNum; private Point head; internal Point Head get return head; set head = value; public int Direct get return direct; set direct = value; public void initArr(int[,] arr, int x, int y, int _d = 0) for (int i = 0; i < x; i++) for (int j = 0; j < y; j++) arr[i, j] = _d; public Snake() head = new Point(4,1); xNum = yNum = 10; direct = 0; rand = new Random(); food = new Point(); generateFood(); public void generateFood() food.X = rand.Next(10); food.Y = rand.Next(10); public void left() if(direct!=3)direct = 1; public void right() if (direct != 1) direct = 3; public void up() if (direct != 0) direct = 2; public void down() if (direct != 2) direct = 0; public void next() Point p = new Point(head.X,head.Y); switch (direct) case 0: p.X+=1; break; case 1: p.Y-=1; break; case 2: p.X-=1; break; case 3: p.Y+=1; break; if (p.X == food.X && p.Y == food.Y) generateFood(); eat(p.X, p.Y); head = p ; return; sQ.Insert(0, p); sQ.RemoveAt(sQ.Count - 1); head = p; public void addHead() sQ.Insert(0, head); public bool isOver() Point p = head; bool res = false; switch (direct) case 0: if (p.X == xNum - 1) res = true ; break; case 1: if (p.Y == 0) res = true; break; case 2: if (p.X == 0) res = true; break; case 3: if (p.Y == yNum - 1) res = true; break; return res; public void eat(int x, int y) Point p = new Point(x, y); head = p; sQ.Insert(0, p);
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　　Snake的基本功能在Snake类中都实现了，下面的工作就是在界面类中调用类的函数，完成程序的最后步骤。先添加响应函数，总共有下面的响应函数
　　3个menuitem的响应函数，前面已经添加；
　　1个定时器的回调函数；
　　2个键盘响应函数；keyup和keydown
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　　添加完成响应函数之后是没有实现的，需要自己实现函数体，代码都在 Form1.cs中修改。
　　下面就是我实现的代码：格式很乱！！没办法（看不清的话我会将源代码放到网上，下载链接在下面）
　　using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Windows.Forms;namespace Snake public partial class Form1 : Form Snake snake; Point food; int[,] data; int unitWidth, unitHeight; int xNum, yNum; Pen bgPen; Pen greenPen; Pen whitePen; Pen yellowPen; Pen redPen; public Form1() InitializeComponent(); food = new Point(); xNum = 10; yNum = 10; data = new int[xNum, yNum]; bgPen = new Pen(Color.Black); whitePen = new Pen(Color.White); greenPen = new Pen(Color.Green); yellowPen = new Pen(Color.Yellow); redPen = new Pen(Color.Red); snake = new Snake() ; this.pBox.Image = new System.Drawing.Bitmap(this.pBox.Size.Width, this.pBox.Size.Height); this.unitWidth = this.pBox.Image.Width / this.yNum - 1; this.unitHeight = this.pBox.Image.Height / this.xNum - 1; reDrawPBox(); this.timer1.Enabled = false; initFace(); void initFace() snake.addHead(); void gameOver() Graphics g = Graphics.FromImage(this.pBox.Image); System.Drawing.Font font = new System.Drawing.Font("微软雅黑", 20); g.DrawString("GAME OVER", font, this.redPen.Brush, this.pBox.Image.Width / 2 - 80, this.pBox.Image.Height / 3); this.pBox.Refresh(); font.Dispose(); g.Dispose(); void drawMemory() snake.initArr(data, xNum, yNum); for (int i = 0; i < snake.SQ.Count; i++) data[snake.SQ.ElementAt(i).X, snake.SQ.ElementAt(i).Y] = 2; data[snake.Head.X, snake.Head.Y] = 1 ; data[snake.Food.X, snake.Food.Y] = 3; // 食物 void reDrawPBox() Graphics g = Graphics.FromImage(pBox.Image); Pen otPen = null; g.FillRectangle(bgPen.Brush, 0, 0, this.pBox.Image.Width, this.pBox.Image.Height); for (int i = 0; i < this.xNum; i++) for (int j = 0; j < this.yNum; j++) if (data[i, j] == 0) otPen = whitePen; else if(data[i, j] == 1)otPen = redPen ; else if (data[i, j] == 2) otPen = greenPen; else if (data[i, j] == 3) otPen = yellowPen; g.FillRectangle(otPen.Brush,j * (unitWidth + 1), i * (unitHeight + 1), unitWidth, unitHeight); pBox.Refresh(); g.Dispose(); private void onStartMenuClick(object sender, EventArgs e) snake.SQ.Clear(); snake.addHead(); snake.initArr(data, xNum, yNum); this.timer1.Enabled = true; private void timer1_Tick(object sender, EventArgs e) if (snake.isOver()) gameOver(); this.timer1.Enabled = false; return; snake.next(); drawMemory(); reDrawPBox(); private void onKeyUp(object sender, KeyEventArgs e) if(e.KeyCode == Keys.Up) snake.up(); else if(e.KeyCode == Keys.Left) snake.left(); else if(e.KeyCode == Keys.Down) snake.down(); else if (e.KeyCode == Keys.Right) snake.right(); private void onStopMenuClick(object sender, EventArgs e) if (this.stopToolStripMenuItem.Text == "继续") this.timer1.Enabled = true; this.stopToolStripMenuItem.Text = "暂停"; else this.timer1.Enabled = false; this.stopToolStripMenuItem.Text = "继续"; private void onExitClick(object sender, EventArgs e) Environment.Exit(0); private void onKeyDown(object sender, KeyEventArgs e) if (e.KeyCode == Keys.Up) snake.up(); else if (e.KeyCode == Keys.Left) snake.left(); else if (e.KeyCode == Keys.Down) snake.down(); else if (e.KeyCode == Keys.Right) snake.right(); if (snake.isOver()) gameOver(); this.timer1.Enabled = false; return; snake.next(); drawMemory(); reDrawPBox();
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　　然后就是调试，运行了，这样就能出现最简单的贪吃蛇游戏了！
　　注意事项

　　先调试，后运行
　　注意程序的键盘响应部分
　　源代码可以去CSDN中找 C#贪吃蛇 参考技术A 你的问题没写清除，你要把图或代码贴出来。