C#—实验9.1、9.2、9.3和9.4

你的名字 2022-08-22 12:23 179阅读 0赞

/*
     * 设计电子时钟。要求：启动窗体后，在窗体的标签上显示系统当前日期和时间；单机结束按钮，则停止显示。
     */
    using System;
    using System.Collections.Generic;
    using System.Linq;
    using System.Text;
    using System.Windows.Forms;
    
    namespace WindowsFormsApplication1
    {
        public partial class Form1 : Form
        {
            public Form1()
            {
                InitializeComponent();
            }
    
            private void Form1_Load(object sender, EventArgs e)
            {
                button1.Text = "结束";
                timer1.Enabled = true;
                timer1.Interval = 1000;
            }
    
            private void timer1_Tick(object sender, EventArgs e)
            {
                label1.Text = DateTime.Now.ToString();
            }
    
            private void button1_Click(object sender, EventArgs e)
            {
                label1.Visible = false;
            }
        }
    }

运行结果：

![Center][]

/*
     * 利用Timer和图片框控件，编写一个图片不断向左移动的小动画。
     * 要求：
     * （1）改变图片的Left值，图片向左（右）移动；改变图片的Top值，图片向下（上）左移动；同时改变图片的Left和Top值，图片斜向移动；
     * （2）利用Random类的Next方法产生一定范围的数据作为Left值和Top值，可以使图片随意移动；
     * （3）图片不要移出窗体，如果Left值或者Top值超出窗体的范围，能控制图片回到窗体的最左端或最上端。
     */
    using System;
    using System.Collections.Generic;
    using System.Drawing;
    using System.Text;
    using System.Windows.Forms;
    
    namespace WindowsFormsApplication3
    {
        public partial class Form1 : Form
        {
            public Form1()
            {
                InitializeComponent();
            }
            private int num1;
            private int num2;
            private void Form1_Load(object sender, EventArgs e)
            {
                button1.Text = "左右移动";
                button2.Text = "斜向移动";
                button3.Text = "随机";
                button4.Text = "结束";
                pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
                pictureBox1.Image = Image.FromFile(Application.StartupPath + @"\g.png");
                pictureBox1.Left = 0;
                pictureBox1.Top = 0;
                timer1.Enabled = false;
                timer1.Interval = 50;
                timer2.Enabled = false;
                timer2.Interval = 50;
                timer3.Enabled = false;
                timer3.Interval = 50;
            }
    
            private void button1_Click(object sender, EventArgs e)
            {
                timer1.Start();
                timer2.Stop();
                timer3.Stop();
            }
    
            private void button2_Click(object sender, EventArgs e)
            {
                timer2.Start();
                timer1.Stop();
                timer3.Stop();
            }
    
            private void button3_Click(object sender, EventArgs e)
            {
                timer1.Stop();
                timer2.Stop();
                timer3.Start();
                
            }
    
            private void button4_Click(object sender, EventArgs e)
            {
                timer1.Stop();
                timer2.Stop();
                timer3.Stop();
            }
    
            private void timer1_Tick(object sender, EventArgs e)
            {
                pictureBox1.Left += 10;
                if (pictureBox1.Left > this.ClientSize.Width-150)
                {
                    pictureBox1.Left = 1;
                }
            }
    
            private void timer2_Tick(object sender, EventArgs e)
            {
                pictureBox1.Left += 10;
                pictureBox1.Top += 10;
                if (pictureBox1.Left > this.ClientSize.Width - 150)
                {
                    pictureBox1.Left = 1;
                }
                if (pictureBox1.Top > this.ClientSize.Height)
                {
                    pictureBox1.Top = 1;
                }
            }
    
            private void timer3_Tick(object sender, EventArgs e)
            {
                Random rd = new Random();
                num1 = rd.Next(0, 255);
                num2 = rd.Next(0, 255);
                pictureBox1.Left = num1;
                pictureBox1.Top = num2;
    
            }          
        }
    }

运行结果：

![Center 1][]

/*
     * 该窗体中有一个图片框，显示一副图片。
     * 要求：
     * （1）该窗体打开时，动态加载图片；
     * （2）设置图片显示模式为根据图片框大小缩放图片；
     * （3）当鼠标留在图片框时，显示如“蛋糕”的文本提示（使用ToolTip控件）；
     * （4）在窗体上添加一个按钮，并设置按钮显示文字为“结束程序”。
     */
    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 WindowsFormsApplication1
    {
        public partial class Form1 : Form
        {
            public Form1()
            {
                InitializeComponent();
            }
    
            private void Form1_Load(object sender, EventArgs e)
            {
                button1.Text = "加载";
                button2.Text = "结束程序";
            }
    
            private void button1_Click(object sender, EventArgs e)
            {
                this.pictureBox1.Image = Image.FromFile("g.png");   //动态加载
                this.pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
                toolTip1.SetToolTip(pictureBox1, "this is a cat");
            }
    
            private void button2_Click(object sender, EventArgs e)
            {
                DialogResult rs = MessageBox.Show("确定要结束程序吗？[Yes|No]", "提示", MessageBoxButtons.YesNo, MessageBoxIcon.Warning, MessageBoxDefaultButton.Button2);
                if (rs == DialogResult.Yes)
                    Application.Exit();
            }
        }
    }

运行结果：

![Center 2][]

![Center 3][]

[Center]: /images/20220722/a4d919922d5d4a60950f673bfa5936c1.png
[Center 1]: /images/20220722/c89bcc25cfe24129a15320ac2a5e126e.png
[Center 2]: /images/20220722/9b28077556a24cfc8b144a4583a628e0.png
[Center 3]: /images/20220722/733032890f0d4174af537364fe8a4f96.png