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?DrawingBoard
{
????enum?DrawTool
????{?
????????Pen
????????Line
????????Ellipse
????????Rectangle
????????Rubber
????}

????public?partial?class?Form1?:?Form
????{
????????private?DrawTool?tool;
????????private?Point?starPt?oldPtnewPt;
????????private?Pen?pen=Pens.Red;
????????private?Graphics?g;
????????private?Color?forecolor;
????????private?int?penWidth;
????????private?bool?isDown?=?false;

????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}

????????private?void?Form1_Load_1（object?sender?EventArgs?e）
????????{
????????????g?=?this.CreateGraphics（）;
????????}

????????private?void?toolColor_Click（object?sender?EventArgs?e）
????????{
????????????if?（colorDialog1.ShowDialog（）?==?DialogResult.OK）
????????????{
????????????????forecolor?=?colorDialog1.Color;
????????????????pen?=?new?Pen（forecolor?penWidth）;
????????????}
????????}

????????private?void?toolPenWidth_SelectedIndexChanged（object?sender?EventArgs?e）
????????{
????????????toolPenWidth.Text?=?toolPenWidth.SelectedItem.ToString（）;
????????????penWidth?=?int.Parse（toolPenWidth.Text）;
????????????pen?=?new?Pen（forecolor?penWidth）;
????????}

????????private?void?toolPen_Click（object?sender?EventArgs?e）
????????{
????????????tool?=?DrawTool.Pen;
????????}

????????private?void?toolLine_Click（object?sender?EventArgs?e）
????????{
????????????tool?=?DrawTool.Line;
????????}

????????private?void?toolEllipse_Click（object?sender?EventArgs?e）
????????{
????????????tool?=?DrawTool.Ellipse;
????????}

????????private?void?toolRectangle_Click（object?sender?EventArgs?e）
????????{
????????????tool?=?DrawTool.Rectangle;
????????}

????????private?void?toolRubber_Click（object?sender?EventArgs?e）
????????{
????????????tool?=?DrawTool.Rubber;
????????}

????????private?void?Form1_MouseDown（object?sender?MouseEventArgs?e）
????????{
????????????if?（e.Button?==?MouseButtons.Left）
????????????{
????????????????starPt?=?new?Point（e.X?e.Y）;
????????????????oldPt?=?new?Point（e.X?e.Y）;
????????????????isDown?=?true;
????????????}
????????}

????????private?void?Form1_MouseUp（object?sender?MouseEventArgs?e）
????????{
????????????isDown?=?false;
????????????switch?（tool）
????????????{
????????????????case?DrawTool.Line:
????????????????????{
????????????????????????Point?endpt?=?new?Point（e.X?e.Y）;
????????????????????????g.DrawLine（pen?starPt?endpt）;
????????????????????????break;
????????????????????}
????????????????case?DrawTool.Ellipse:
????????????????????{
????????????????????????Rectangle?rect?=?new?Rectangle（starPt.X?starPt.Ye.X-starPt.Xe.Y-starPt.Y）;
????????????????????????g.DrawEllipse（pen?rect）;
????????????????????????break;
????????????????????}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件??????15872??2018-10-10?23:34??DrawingBoard\DrawingBoard\bin\Debug\DrawingBoard.exe

?????文件??????34304??2018-10-10?23:34??DrawingBoard\DrawingBoard\bin\Debug\DrawingBoard.pdb

?????文件??????11600??2018-10-10?23:42??DrawingBoard\DrawingBoard\bin\Debug\DrawingBoard.vshost.exe

?????文件????????490??2017-03-19?05:00??DrawingBoard\DrawingBoard\bin\Debug\DrawingBoard.vshost.exe.manifest

?????文件????????630??2018-10-10?19:30??DrawingBoard\DrawingBoard\Bitmap1.bmp

?????文件????????630??2018-10-10?19:30??DrawingBoard\DrawingBoard\Bitmap2.bmp

?????文件????????630??2018-10-10?19:30??DrawingBoard\DrawingBoard\Bitmap3.bmp

?????文件????????630??2018-10-10?19:30??DrawingBoard\DrawingBoard\Bitmap4.bmp

?????文件???????1270??2018-10-10?19:30??DrawingBoard\DrawingBoard\Bitmap5.bmp

?????文件????????630??2018-10-10?19:30??DrawingBoard\DrawingBoard\Bitmap6.bmp

?????文件???????3948??2018-10-10?19:30??DrawingBoard\DrawingBoard\DrawingBoard.csproj

?????文件???????3898??2018-10-10?23:34??DrawingBoard\DrawingBoard\Form1.cs

?????文件???????8515??2018-10-10?23:26??DrawingBoard\DrawingBoard\Form1.Designer.cs

?????文件???????9742??2018-10-10?23:26??DrawingBoard\DrawingBoard\Form1.resx

?????文件???????5420??2018-10-10?23:42??DrawingBoard\DrawingBoard\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache

?????文件???????6920??2018-10-10?23:34??DrawingBoard\DrawingBoard\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache

?????文件???????1290??2018-10-10?23:42??DrawingBoard\DrawingBoard\obj\x86\Debug\DrawingBoard.csproj.FileListAbsolute.txt

?????文件????????975??2018-10-10?23:26??DrawingBoard\DrawingBoard\obj\x86\Debug\DrawingBoard.csproj.GenerateResource.Cache

?????文件??????15872??2018-10-10?23:34??DrawingBoard\DrawingBoard\obj\x86\Debug\DrawingBoard.exe

?????文件???????2994??2018-10-10?23:26??DrawingBoard\DrawingBoard\obj\x86\Debug\DrawingBoard.Form1.resources

?????文件??????34304??2018-10-10?23:34??DrawingBoard\DrawingBoard\obj\x86\Debug\DrawingBoard.pdb

?????文件????????180??2018-10-10?20:47??DrawingBoard\DrawingBoard\obj\x86\Debug\DrawingBoard.Properties.Resources.resources

?????文件????????493??2018-10-10?19:09??DrawingBoard\DrawingBoard\Program.cs

?????文件???????1374??2018-10-10?19:09??DrawingBoard\DrawingBoard\Properties\AssemblyInfo.cs

?????文件???????2876??2018-10-10?19:09??DrawingBoard\DrawingBoard\Properties\Resources.Designer.cs

?????文件???????5612??2018-10-10?19:09??DrawingBoard\DrawingBoard\Properties\Resources.resx

?????文件???????1099??2018-10-10?19:09??DrawingBoard\DrawingBoard\Properties\Settings.Designer.cs

?????文件????????249??2018-10-10?19:09??DrawingBoard\DrawingBoard\Properties\Settings.settings

?????文件????????878??2018-10-10?19:09??DrawingBoard\DrawingBoard.sln

????..A..H.?????34304??2018-10-10?23:42??DrawingBoard\DrawingBoard.suo

............此處省略12個文件信息