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1、C#画图程序，可以话直线，可以画圆，可以使用橡皮檫，可以新建文件，打开文件，保存文件，退出，可画矩形，可旋转。下面为程序全整代码。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;using System.Drawing.Imaging;using System.IO;using System.T
2、hreading;using System.Drawing.Drawing2D;using System.Text.RegularExpressions;using System.Collections;namespace mydraw public partial class Form1 : Form Pen p = new Pen(Color.Black, 5); int mdb2 = 1; Point b2start = new Point(0, 0); Point b2stop = new Point(0, 0); int mdb3 = 1; Point b3start = new P
3、oint(0, 0); Point b3stop = new Point(0, 0); int mdb4 = 1; Point b4start = new Point(0, 0); Point b4stop = new Point(0, 0); int mdb10= 1; Point b10start = new Point(0, 0); Point b10stop = new Point(0, 0); public Form1() InitializeComponent(); private void 退出ToolStripMenuItem_Click(object sender, Even
4、tArgs e) Application.Exit(); private void 新建图形ToolStripMenuItem_Click(object sender, EventArgs e) pictureBox1.Refresh(); private void button1_Click(object sender, EventArgs e) if (button1.BackColor = Color.White) button1.BackColor = Color.MistyRose; button2.BackColor = Color.White; button3.BackColor
5、 = Color.White; button4.BackColor = Color.White; button5.BackColor = Color.White; button10.BackColor = Color.White; pictureBox1.Cursor = Cursors.Cross; else button1.BackColor = Color.White; pictureBox1.Cursor = Cursors.Default; private void 清除图形ToolStripMenuItem_Click(object sender, EventArgs e) pri
6、vate void button6_Click(object sender, EventArgs e) ColorDialog ColorDialog1 = new ColorDialog(); ColorDialog1.AllowFullOpen = true; ColorDialog1.FullOpen = true; ColorDialog1.ShowHelp = true; ColorDialog1.Color = Color.Black; if (ColorDialog1.ShowDialog() != DialogResult.Cancel) button6.BackColor =
7、 ColorDialog1.Color; private void button2_Click(object sender, EventArgs e) if (button2.BackColor = Color.White) button1.BackColor = Color.White; button2.BackColor = Color.MistyRose; button3.BackColor = Color.White; button4.BackColor = Color.White; button5.BackColor = Color.White; button10.BackColor
8、 = Color.White; pictureBox1.Cursor = Cursors.Cross; MessageBox.Show(我们一起来画直线吧); else button2.BackColor = Color.White; pictureBox1.Cursor = Cursors.Default; private void button3_Click(object sender, EventArgs e) if (button3.BackColor = Color.White) button1.BackColor = Color.White; button2.BackColor =
9、 Color.White; button3.BackColor = Color.MistyRose; button4.BackColor = Color.White; button5.BackColor = Color.White; button10.BackColor = Color.White; pictureBox1.Cursor = Cursors.Cross; MessageBox.Show(先选择矩形左上角的点，再选择矩形的右下角的点); else button3.BackColor = Color.White; pictureBox1.Cursor = Cursors.Defau
10、lt; private void button4_Click(object sender, EventArgs e) if (button4.BackColor = Color.White) button1.BackColor = Color.White; button2.BackColor = Color.White; button3.BackColor = Color.White; button4.BackColor = Color.MistyRose; button5.BackColor = Color.White; button10.BackColor = Color.White; p
11、ictureBox1.Cursor = Cursors.Cross; MessageBox.Show(先选择椭圆左上角的点，再选择椭圆的右下角的点); else button4.BackColor = Color.White; pictureBox1.Cursor = Cursors.Default; private void button5_Click(object sender, EventArgs e) if (button5.BackColor = Color.White) button1.BackColor = Color.White; button2.BackColor = Col
12、or.White; button3.BackColor = Color.White; button4.BackColor = Color.White; button5.BackColor = Color.MistyRose; button10.BackColor = Color.White; pictureBox1.Cursor = Cursors.Cross; else button5.BackColor = Color.White; pictureBox1.Cursor = Cursors.Default; private void button10_Click(object sender
13、, EventArgs e) if (button10.BackColor = Color.White) button1.BackColor = Color.White; button2.BackColor = Color.White; button3.BackColor = Color.White; button4.BackColor = Color.White; button10.BackColor = Color.MistyRose; button5.BackColor = Color.White; pictureBox1.Cursor = Cursors.Cross; MessageB
14、ox.Show(先选择圆的圆心，再选择圆上的一点); else button10.BackColor = Color.White; pictureBox1.Cursor = Cursors.Default; private void 关于作者ToolStripMenuItem_Click(object sender, EventArgs e) MessageBox.Show(作者:林元培 学号：2011301610213); private void pictureBox1_MouseMove(object sender, MouseEventArgs e) /画自由线的 if (button
15、1.BackColor = Color.MistyRose) Graphics g = pictureBox1.CreateGraphics(); if (e.Button = MouseButtons.Left) p.Color = button6.BackColor; Point start = new Point(e.X, e.Y); Point stop = new Point(e.X, e.Y - 1); Point part = new Point(int)(start.X + stop.X) / 2, (int)(start.Y + stop.Y) / 2); g.DrawLin
16、e(p, start, part); g.DrawLine(p, part, start); start = stop; /橡皮擦 if (button5.BackColor = Color.MistyRose) Graphics g = pictureBox1.CreateGraphics(); if (e.Button = MouseButtons.Left) p.Color = Color.White; p.Width = 30; Point start = new Point(e.X, e.Y); Point stop = new Point(e.X, e.Y - 1); Point
17、part = new Point(int)(start.X + stop.X) / 2, (int)(start.Y + stop.Y) / 2); g.DrawLine(p, start, part); g.DrawLine(p, part, start); start = stop; /画直线 private void pictureBox1_MouseDown(object sender, MouseEventArgs e) /画两点间直线 if (button2.BackColor = Color.MistyRose) if (this.mdb2 = 1) b2start.X = e.
18、X; b2start.Y = e.Y; mdb2+; else if (this.mdb2 = 2) b2stop.X = e.X; b2stop.Y = e.Y; mdb2-; Graphics g = pictureBox1.CreateGraphics(); p.Color = button6.BackColor; g.DrawLine(p, b2start, b2stop); /画两点间矩形 if (button3.BackColor = Color.MistyRose) if (this.mdb3 = 1) b3start.X = e.X; b3start.Y = e.Y; mdb3
19、+; else if (this.mdb3 = 2) b3stop.X = e.X; b3stop.Y = e.Y; mdb3-; Graphics g = pictureBox1.CreateGraphics(); p.Color = button6.BackColor; if (b3stop.X - b3start.X 0 | b3stop.Y - b3start.Y 0) MessageBox.Show(孩子，我不是说过的吗n先指定左上一点, Error, MessageBoxButtons.OK, MessageBoxIcon.Error); g.DrawRectangle(p, b3
20、start.X, b3start.Y, b3stop.X - b3start.X, b3stop.Y - b3start.Y); /画两点间椭圆 if (button4.BackColor = Color.MistyRose) if (this.mdb4 = 1) b4start.X = e.X; b4start.Y = e.Y; mdb4+; else if (this.mdb4 = 2) b4stop.X = e.X; b4stop.Y = e.Y; mdb4-; Graphics g = pictureBox1.CreateGraphics(); p.Color = button6.Ba
21、ckColor; if (b4stop.X - b4start.X 0 | b4stop.Y - b4start.Y 0) MessageBox.Show(小朋友，注意点的顺序！, Error, MessageBoxButtons.OK, MessageBoxIcon.Error); g.DrawEllipse(p, b4start.X, b4start.Y, b4stop.X - b4start.X, b4stop.Y - b4start.Y); /画圆的代码 if (button10.BackColor = Color.MistyRose) if (this.mdb10 = 1) b10s
22、tart.X = e.X; b10start.Y = e.Y; mdb10+; else if (this.mdb10 = 2) b10stop.X = e.X; b10stop.Y = e.Y; mdb10-; p.Color = button6.BackColor; Graphics g = pictureBox1.CreateGraphics(); int d = (int)Math.Sqrt(b10start.X - b10stop.X) * (b10start.X - b10stop.X) + (b10start.Y - b10stop.Y) * (b10start.Y - b10s
23、top.Y); Rectangle rect = new Rectangle(b10start.X-d , b10start.Y-d, 2*d, 2*d); g.DrawEllipse(p ,rect ); 美容养颜吧：http:/ private void button7_Click(object sender, EventArgs e) p.Width = 2; private void button8_Click(object sender, EventArgs e) p.Width = 5; private void button9_Click(object sender, Event
24、Args e) p.Width = 10; private void 保存ToolStripMenuItem_Click(object sender, EventArgs e) SaveFileDialog sa = new SaveFileDialog(); sa.Filter = 保存(*.bmp)|*.bmp; sa.FilterIndex = 2; sa.RestoreDirectory = true; if (DialogResult.OK = sa.ShowDialog() if (pictureBox1.Image != null) Image im = this.picture
25、Box1.Image; Bitmap bit = new Bitmap(im); bit.Save(sa.FileName, System.Drawing.Imaging.ImageFormat.Bmp); else MessageBox.Show(已保存); private void 旋转ToolStripMenuItem_Click(object sender, EventArgs e) private void 度ToolStripMenuItem_Click(object sender, EventArgs e) private void 度ToolStripMenuItem1_Cli
26、ck(object sender, EventArgs e) private void 新建ToolStripMenuItem_Click(object sender, EventArgs e) private void pictureBox1_Click(object sender, EventArgs e) private void 关于ToolStripMenuItem_Click(object sender, EventArgs e) private void Form1_Load(object sender, EventArgs e) private void groupBox1_E
27、nter(object sender, EventArgs e) private void 缩放ToolStripMenuItem_Click(object sender, EventArgs e) private void 放大ToolStripMenuItem_Click(object sender, EventArgs e) private void maskedTextBox1_MaskInputRejected(object sender, MaskInputRejectedEventArgs e) MessageBox.Show(先选择矩形左上角的点，再选择矩形的右下角的点); private void button11_Click(object sender, EventArgs e)