C# 画图工具鼠标拖动方式

用C#编写的一个简单的绘图工具，用鼠标拖动画圆，矩形，线条等，适合初学者。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Collections;

namespace DrawDesigns
{
    public partial class Form1 : Form
    {
        Boolean mouseDown = false; //鼠标左键是否按下        
        String drawShape = “Line“; //椭什么形状，初始为线
        Point StartPoint = Point.Empty EndPoint = Point.Empty; //鼠标移动的起始点
        Color color = Color.Black; //定义图像边框颜色
        ArrayList appendList = new ArrayList（）; //图形属性列表
        Cursor LineCursor CurveCursor EraserCursor; //鼠标样式        
        public Form1（）
        {
            InitializeComponent（）;            
        }
        //移动
        private void MoveButton_Click（object sender EventArgs e）
        {
            this.Canvas.Cursor = Cursors.Default;
            this.drawShape = ““;
        }
        //直线
        private void DrawLine_Click（object sender EventArgs e）
        {
            LineCursor = new Cursor（“./MouseIcon/Pen.ico“）;
            this.drawShape = “Line“;
            this.Canvas.Cursor = LineCursor;
        }
        //曲线
        private void DrawCurve_Click（object sender EventArgs e）
        {
            CurveCursor = new Cursor（“./MouseIcon/Curve.ico“）;
            this.drawShape = “Curve“;
            this.Canvas.Cursor = CurveCursor;
        }
        //椭圆
        private void DrawEllipse_Click（object sender EventArgs e）
        {
            this.drawShape = “Ellipse“;
            this.Canvas.Cursor = Cursors.Cross;
        }
        //矩形
        private void DrawRectangle_Click（object sender EventArgs e）
        {
            this.drawShape = “Rectangle“;
            this.Canvas.Cursor = Cursors.Cross;
        }
        //擦除
        private void EraserTool_Click（object sender EventArgs e）
        {
            EraserCursor = new Cursor（“./MouseIcon/Eraser.ico“）;
            this.drawShape = “Eraser“;
            this.Canvas.Cursor = EraserCursor;
        }
        /// 

        /// 图形属性列表
        /// 

        public struct ShapeType
        {
            public string type;
            public Point StartPoint EndPoint;
            public Color foreColor backColor;
            public Brush brush;
            public ShapeType（string type Point StartPoint Point EndPoint Color foreColor Color backColor Brush brush）
            {
                this.type = type;
                this.StartPoint = StartPoint;
                this.EndPoint = EndPoint;
                this.foreColor = foreColor;
                this.backColor = backColor;
                this.brush = brush;
            }
        }
        //鼠标按下事件
        private void Canvas_MouseDown（object sender MouseEventArgs e）
        {
            if （e.Button == MouseButtons.Left）
            {
                this.StartPoint = ne

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件      30208  2010-11-15 15:01  DrawDesigns\DrawDesigns\bin\Debug\DrawDesigns.exe

     文件      32256  2010-11-15 15:01  DrawDesigns\DrawDesigns\bin\Debug\DrawDesigns.pdb

     文件      14328  2010-11-15 15:01  DrawDesigns\DrawDesigns\bin\Debug\DrawDesigns.vshost.exe

     文件        490  2007-07-21 01:33  DrawDesigns\DrawDesigns\bin\Debug\DrawDesigns.vshost.exe.manifest

     文件       2238  2010-07-27 23:25  DrawDesigns\DrawDesigns\bin\Debug\MouseIcon\Curve.ico

     文件       4710  2010-07-27 10:52  DrawDesigns\DrawDesigns\bin\Debug\MouseIcon\Eraser.ico

     文件       3638  2010-07-27 10:37  DrawDesigns\DrawDesigns\bin\Debug\MouseIcon\Pen.ico

    ..A.SH.      6656  2010-11-15 14:47  DrawDesigns\DrawDesigns\bin\Debug\MouseIcon\Thumbs.db

     文件       4258  2010-11-15 14:50  DrawDesigns\DrawDesigns\DrawDesigns.csproj

     文件      15596  2010-11-15 14:59  DrawDesigns\DrawDesigns\Form1.cs

     文件      15148  2010-11-15 14:59  DrawDesigns\DrawDesigns\Form1.designer.cs

     文件       9871  2010-11-15 14:59  DrawDesigns\DrawDesigns\Form1.resx

     文件       2238  2010-11-15 14:48  DrawDesigns\DrawDesigns\ICO\Clear.ico

     文件       2238  2010-11-15 14:48  DrawDesigns\DrawDesigns\ICO\Curve.ico

     文件       4710  2010-11-15 14:48  DrawDesigns\DrawDesigns\ICO\Eraser.ico

     文件       2238  2010-11-15 14:48  DrawDesigns\DrawDesigns\ICO\Icon.ico

     文件       3638  2010-11-15 14:48  DrawDesigns\DrawDesigns\ICO\Pen.ico

    ..A.SH.     16896  2010-11-15 14:54  DrawDesigns\DrawDesigns\ICO\Thumbs.db

     文件       2238  2010-11-15 14:48  DrawDesigns\DrawDesigns\Icon.ico

     文件       2374  2010-11-15 14:48  DrawDesigns\DrawDesigns\Image\CircleShape.png

     文件       8097  2010-11-15 14:48  DrawDesigns\DrawDesigns\Image\color.jpg

     文件       3819  2010-11-15 14:48  DrawDesigns\DrawDesigns\Image\cursor.png

     文件       3289  2010-11-15 14:48  DrawDesigns\DrawDesigns\Image\Rectangle.png

    ..A.SH.     14336  2010-11-15 14:54  DrawDesigns\DrawDesigns\Image\Thumbs.db

     文件        512  2010-11-15 15:01  DrawDesigns\DrawDesigns\obj\Debug\DrawDesigns.csproj.FileListAbsolute.txt

     文件       1094  2010-11-15 15:01  DrawDesigns\DrawDesigns\obj\Debug\DrawDesigns.csproj.GenerateResource.Cache

     文件      30208  2010-11-15 15:01  DrawDesigns\DrawDesigns\obj\Debug\DrawDesigns.exe

     文件       2804  2010-11-15 15:01  DrawDesigns\DrawDesigns\obj\Debug\DrawDesigns.Form1.resources

     文件      32256  2010-11-15 15:01  DrawDesigns\DrawDesigns\obj\Debug\DrawDesigns.pdb

     文件       7930  2010-11-15 15:01  DrawDesigns\DrawDesigns\obj\Debug\DrawDesigns.Properties.Resources.resources

............此处省略23个文件信息