C# Winform代码片段-大二下学期的垃圾代码

1.图片缩放

using System;
using System.Windows.Forms;
using System.Drawing;
class haha : Form
{
    static void Main()
    {
        Application.Run(new haha());
    }
    Bitmap bit;
    int x, y;
    haha()
    {
        ClientSize = new Size(400, 400);
        bit = new Bitmap(800, 800);
        Graphics.FromImage(bit).DrawImage(Image.FromFile("beauty.jpg"),new Rectangle(new Point(0,0),new Size(bit.Width,bit.Height)));
        KeyDown += roll;
        MouseWheel += zoom;
        x = y = 0;
    }
    void zoom(object o, MouseEventArgs e)
    {
        if ((bit.Width < 100||bit.Height<100)&&e.Delta<0) return;
        if (bit.Width + e.Delta < 0 || bit.Height + e.Delta < 0) return;
        Bitmap b = new Bitmap(bit.Width + e.Delta, bit.Height + e.Delta);
        Graphics.FromImage(b).DrawImage(bit, new Rectangle(0, 0, b.Width, b.Height));
        bit = b;
        draw();
    }
    void draw()
    {
        if (x >= bit.Width - ClientSize.Width) x = bit.Width - 1 - ClientSize.Width;
        if (y >= bit.Height - ClientSize.Height) y = bit.Height - ClientSize.Height - 1;
        if (x < 0) x = 0;
        if (y < 0) y = 0;
        Bitmap b = new Bitmap(ClientSize.Width, ClientSize.Height);
        int i, j;
        for (i = 0; i < ClientSize.Width; i++)
            for (j = 0; j < ClientSize.Height; j++)
            {
                if (x + i >= bit.Width || y + j >= bit.Height)
                    b.SetPixel(i, j, Color.AliceBlue);
                else 
                    b.SetPixel(i, j, bit.GetPixel(x + i, y + j));
            }
        CreateGraphics().DrawImage(b, 0, 0);
    }
    void roll(object o, KeyEventArgs e)
    {
        switch (e.KeyCode)
        {
            case Keys.Up: y -= 10; break;
            case Keys.Down: y += 10; break;
            case Keys.Right: x += 10; break;
            case Keys.Left: x -= 10; break;
        }
        draw();
    }
}

2.位图操作-乱画

using System.Drawing;
using System.Windows.Forms;
using System;
class haha:Form
{
    Bitmap bit;
    Random r = new Random();
    static void Main()
    {
        Application.Run(new haha());
    }
    void circle(int xx, int yy, int r,Color c)
    {
        int x; double y;
        for (x = xx - r; x < xx + r; x++)
        {
            y = Math.Sqrt(r * r - (xx - x) * (xx - x));
            if (x < 0 || yy - y < 0 || x >= bit.Width || yy + y >= bit.Height) continue;
            bit.SetPixel(x, (int)(y+yy), c);
            bit.SetPixel(x, (int)( yy-y), c);
        }
    }
    void line(int x1,int y1,int x2,int y2,Color c)
    {
        int fx, fy, tx, ty;
        if(x1==x2){
             if(y1>y2){
                fx=x2;fy=y2;
                tx=x1;ty=y1;
            }
            else {
                fx=x1;fy=y1;
                tx=x2;ty=y2;
            }
            int i;
            for (i = fy; i < ty; i++)
            {
                bit.SetPixel(x1, i, c);
            }
            CreateGraphics().DrawImage(bit,0,0);
            return;
        }
        if (x1 > x2)
        {
            fx = x2; fy = y2;
            tx = x1; ty = y1;
        }
        else
        {
            fx = x1; fy = y1;
            tx = x2; ty = y2;
        }
        double k = (ty - fy) / (tx - fx);
        double y;
        int x;
        for (x = fx; x < tx; x++)
        {
            y = k * x + ((double)y1 - k * x1);
            bit.SetPixel(x, (int)y, c);
        }
        CreateGraphics().DrawImage(bit, 0, 0);
    }
    haha()
    {
        ClientSize = new Size(500, 500);
        bit = new Bitmap(ClientSize.Width, ClientSize.Height);
        Graphics.FromImage(bit).Clear(Color.White);
        Timer t1 = new Timer();
        t1.Interval = 5000;
        t1.Tick += draw_line;
        //t1.Start();
        Timer t2 = new Timer();
        t2.Interval = 10;
        t2.Tick += draw_circle;
        t2.Start();
    }
    void draw_line(object o,EventArgs e)
    {
        line(r.Next()%ClientSize.Width, r.Next()%ClientSize.Height, r.Next()%ClientSize.Width, r.Next()%ClientSize.Height, Color.FromArgb(r.Next()));
    }
    void draw_circle(object o, EventArgs e)
    {
        int rr=r.Next() % 100 + 1;
        int xx=r.Next() % ClientSize.Width;
        int yy=r.Next() % ClientSize.Height;
        for (int i = 0; i < 16&&rr>i;i++ )
            circle(xx,yy , rr-i, Color.FromArgb(r.Next()));
        CreateGraphics().DrawImage(bit, 0, 0);
    }
}

3.图片旋转

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            KeyDown += draw;
            bitmap = new Bitmap(Image.FromFile("0.jpg"));
            ClientSize = new Size(700,700);
        }
        Bitmap rotate(Bitmap source)
        {
            Bitmap bit = new Bitmap(source.Height, source.Width);
            for (int x = 0; x < bit.Width; x++)
            {
                for (int y = 0; y < bit.Height; y++)
                {
                    bit.SetPixel(x, y, source.GetPixel(bit.Height- y-1, x));
                }
            }
            return bit;
        }
        Bitmap bitmap;
        void draw(object o, EventArgs e)
        {
            CreateGraphics().Clear(Color.Black);
            bitmap = rotate(bitmap);
            CreateGraphics().DrawImage(bitmap, 0, 0);
        }
    }

4.鼠标单击拖动图片

using System;
using System.Windows.Forms;
using System.Drawing;
class window : Form
{
    Rectangle rec=new Rectangle(23,23,23,23);
    Bitmap b=new Bitmap("beauty.jpg");
    int x, y;
    int dx, dy;
    bool move;
    public window(){
        MouseClick +=click;
        MouseMove += OnMove;
        Paint += paint;
        Size = new Size(800,800);
        x = y = 0;
    }
    void OnMove(object o, MouseEventArgs e)
    {
        if (move)
        {
            Bitmap bit = new Bitmap(Width,Height);
            Graphics g = Graphics.FromImage(bit);
            g.Clear(Color.AliceBlue);
            g.DrawImage(b, e.X+dx, e.Y+dy);
            for (int i = 10; i < bit.Width; i++)
                bit.SetPixel(i, 100, Color.Red);
            CreateGraphics().DrawImage(bit, 0, 0);
        }
    }
    void paint(object o, EventArgs e)
    {
        CreateGraphics().DrawImage(b,0,0);
    }
    void click(object o, MouseEventArgs e)
    {
        if (e.X > x && e.X < x + b.Width && e.Y > y && e.Y < y + b.Height && move == false) { move = true; dx = x - e.X; dy = y - e.Y; }
        else if (move == true)
        {
            x = e.X+dx; y = e.Y+dy;
            move = false;
        }
    }
    
    public static void Main()
    {  
        Application.Run(new window());
    }
}

5.没有边框的窗口

    public partial class Form1 : Form
    {
        public Form1()
        {
            ClientSize = Screen.PrimaryScreen.Bounds.Size;
            FormBorderStyle = FormBorderStyle.None;
            Paint += draw;
            TransparencyKey = DefaultBackColor;
            ShowInTaskbar = false;
        }
        void draw(object o, EventArgs e)
        {
            CreateGraphics().Clear(DefaultBackColor);
            Bitmap bit=new Bitmap(ClientSize.Width,ClientSize.Height);
            bit.MakeTransparent(Color.White);
            Graphics.FromImage(bit).DrawString("东大微雕
文韬武略
天下第一", new Font(new FontFamily("Consolas"),200,GraphicsUnit.Pixel),new SolidBrush(Color.Red),new Rectangle(30,30,ClientRectangle.Right,ClientRectangle.Bottom));
            //BackgroundImage = bit;
            //释放上面这句就会导致闪烁
            CreateGraphics().DrawImage(bit,ClientRectangle);
        }
    }

6.全屏的窗口

    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            Size = MaximumSize;
            WindowState = FormWindowState.Maximized;
            FormBorderStyle = FormBorderStyle.None;
            Paint += paint;
            files= Directory.GetFiles(Directory.GetCurrentDirectory(),"*.jpg");
            KeyDown += down;
        }
        void down(object o, KeyEventArgs e)
        {
            index++;
            Invalidate();
        }
        string[] files;
        int index=0;
        void paint(object o, PaintEventArgs e)
        {
            Bitmap bit = new Bitmap(ClientSize.Width,ClientSize.Height);
            Graphics.FromImage(bit).DrawImage(Image.FromFile(files[index%files.Length]), ClientRectangle);
            e.Graphics.DrawImage(bit,0,0);
        }
    }

7.分工演示器

    public partial class Form1 : Form
    {
        SpeechSynthesizer teller = new SpeechSynthesizer();
        void tell(string s)
        {
            teller.Speak(s);
        }
        void crossLine(int from, int to)
        {
            int w = bit.Width / (size + 1);
            int h = bit.Height / (size + 1);
            Graphics g = Graphics.FromImage(bit);
            Pen p = new Pen(new SolidBrush(Color.Gold),4);
            g.DrawLine(p, work[from] * w + w + w / 2, from * h + h + h / 2, work[to] * w + w + w / 2, to * h + h + h / 2);
            g.DrawLine(p, work[to] * w + w + w / 2, from * h + h + h / 2, work[from] * w + w + w / 2, to * h + h + h / 2);
            CreateGraphics().DrawImage(bit,0,0);
        }
        void go()
        {
            int i, j;
            bool changed = true;
            while (changed)
            {
                tell("只要有变化,那就接着调整.调整哇调整,一直到没法再调整了");
                changed = false;
                for (i = 0; i < size; i++)
                {
                    for (j = size - 1; j >= 0; j--)
                    {
                        if (a[i, work[j]] + a[j, work[i]] < a[i, work[i]] + a[j, work[j]])
                        {
                            crossLine(i, j);
                            tell("工人" + man[i] + "干任务" + (char)(work[i] + 'A') + "需要" + a[i, work[i]] + "的时间");
                            tell("工人" + man[j] + "干任务" + (char)(work[j] + 'A') + "需要" + a[j, work[j]] + "的时间");
                            tell("他们交换一下任务,岂不是更快");
                            int temp = work[i];
                            work[i] = work[j];
                            work[j] = temp;
                            draw();
                            changed = true;
                        }
                    }
                }
            }
        }
        int[] work;
        public Form1()
        {
            InitializeComponent();
            WindowState = FormWindowState.Maximized;
            Text = "分工演示器-written for jiege,made by weidiao";
            var set = teller.GetInstalledVoices();
            teller.SelectVoice(set[0].VoiceInfo.Name);
            init();
            Paint += delegate
            {
                draw();
                go();
                tell("杰哥,你可以百度一下模拟淬火算法,这种方法适用于解决NP问题,但它的缺点就是最后所求的结果不一定对");
                tell("这种方法能够保证得到局部最优解,至于有多么接近最优解,这取决于你所选择的初始值");
                tell("于是,我们可以大量的用很多初始值进行迭代优化,从中选取最好的");
            };
            Resize += delegate
            {
                bit = new Bitmap(this.ClientSize.Width, this.ClientSize.Height);
                draw();
            };
        }
        Bitmap bit;
        char[] man = "甲乙丙丁戊己庚辛壬癸".ToCharArray();
        void draw()
        {
            Graphics g = Graphics.FromImage(bit);
            g.Clear(Color.Black);
            int i, j;
            int w = bit.Width / (size + 1);
            int h = bit.Height / (size + 1);
            g.FillRectangle(new SolidBrush(Color.Gray), new Rectangle(0, 0, w - 2, h - 2));
            g.DrawLine(new Pen(new SolidBrush(Color.Black), 2), 0, 0, w, h);
            g.DrawString("任务", new Font("楷体", 20, FontStyle.Bold), new SolidBrush(Color.Crimson), new RectangleF(w / 2, 0, w / 2, h / 2));
            g.DrawString("人物", new Font("楷体", 20, FontStyle.Bold), new SolidBrush(Color.DarkOrange), new RectangleF(0, h / 2, w / 2, h / 2));
            for (i = 0; i < size; i++)
            {
                RectangleF rec = new RectangleF(w + w * i, 0, w - 2, h - 2);
                g.FillRectangle(new SolidBrush(Color.Gray), rec);
                g.DrawString((char)(i + 'A') + "", new Font("Consolas", 40, FontStyle.Bold), new SolidBrush(Color.Crimson), rec);
            }
            for (i = 0; i < size; i++)
            {
                RectangleF rec = new RectangleF(0, h + i * h, w - 2, h - 2);
                g.FillRectangle(new SolidBrush(Color.Gray), rec);
                g.DrawString(man[i] + "", new Font("Consolas", 40, FontStyle.Bold), new SolidBrush(Color.DarkOrange), rec);
            }
            for (i = 0; i < size; i++)
            {
                for (j = 0; j < size; j++)
                {
                    RectangleF rec = new RectangleF(j * w + w, h + i * h, w - 2, h - 2);
                    Color back = work[i] == j ? Color.Gainsboro : Color.Gray;
                    g.FillRectangle(new SolidBrush(back), rec);
                    g.DrawString(a[i, j] + "", new Font("Consolas", 40, FontStyle.Bold), new SolidBrush(Color.Red), rec);
                }
            }
            CreateGraphics().DrawImage(bit, 0, 0);
        }
        int[,] a;
        Random r = new Random();
        int size;
        void init()
        {
            size = 4;
            a = new int[size, size];
            work = new int[size];
            int i, j;
            for (i = 0; i < size; i++) work[i] = i;
            for (i = 0; i < size; i++)
            {
                for (j = 0; j < size; j++)
                {
                    a[i, j] = r.Next() % 20 + 2;
                }
            }
        }
    }