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

namespace?ImageScale
{
????public?partial?class?Form1?:?Form
????{
????????public?Form1（）?{
????????????InitializeComponent（）;
????????????this.StartPosition?=?FormStartPosition.CenterScreen;
????????????this.pictureBox1.Borderstyle?=?Borderstyle.FixedSingle;
????????????this.pictureBox1.BackColor?=?Color.DarkGray;
????????????this.pictureBox1.MouseWheel?+=?new?MouseEventHandler（pictureBox1_MouseWheel）;
????????}

????????Bitmap?m_bmp;???????????????//畫布中的圖像
????????Point?m_ptCanvas;???????????//畫布原點在設備上的坐標
????????Point?m_ptCanvasBuf;????????//重置畫布坐標計算時用的臨時變量
????????Point?m_ptBmp;??????????????//圖像位于畫布坐標系中的坐標
????????float?m_nScale?=?1.0F;??????//縮放比例

????????Point?m_ptMouseDown;????????//鼠標點下是在設備坐標上的坐標

????????string?m_strMousePt;????????//鼠標當前位置對應的坐標

????????private?void?Form1_Load（object?sender?EventArgs?e）?{
????????????m_bmp?=?GetScreen（）;
????????????//初始化?坐標
????????????m_ptCanvas?=?new?Point（pictureBox1.Width?/?2?pictureBox1.Height?/?2）;
????????????m_ptBmp?=?new?Point（-（m_bmp.Width?/?2）?-（m_bmp.Height?/?2））;
????????}
????????//獲取屏幕圖像
????????public?Bitmap?GetScreen（）?{
????????????Bitmap?bmp?=?new?Bitmap（Screen.PrimaryScreen.Bounds.Width
????????????????Screen.PrimaryScreen.Bounds.Height）;
????????????using?（Graphics?g?=?Graphics.FromImage（bmp））?{
????????????????g.CopyFromScreen（0?0?0?0?bmp.Size）;
????????????}
????????????return?bmp;
????????}
????????//重繪圖像
????????private?void?pictureBox1_Paint（object?sender?PaintEventArgs?e）?{
????????????Graphics?g?=?e.Graphics;
????????????g.TranslateTransform（m_ptCanvas.X?m_ptCanvas.Y）;???????//設置坐標偏移
????????????g.ScaleTransform（m_nScale?m_nScale）;???????????????????//設置縮放比
????????????g.DrawImage（m_bmp?m_ptBmp）;????????????????????????????//繪制圖像

????????????g.ResetTransform（）;?????????????????????????????????????//重置坐標系
????????????Pen?p?=?new?Pen（Color.Cyan?3）;
????????????g.DrawLine（p?0?m_ptCanvas.Y?pictureBox1.Width?m_ptCanvas.Y）;
????????????g.DrawLine（p?m_ptCanvas.X?0?m_ptCanvas.X?pictureBox1.Height）;
????????????p.Dispose（）;
????????????//繪制網格線
????????????float?nIncrement?=?（50?*?m_nScale）;?????????????//網格間的間隔?根據比例繪制
????????????for?（float?x?=?m_ptCanvas.X;?x?>?0;?x?-=?nIncrement）
????????????????g.DrawLine（Pens.Cyan?x?0?x?pictureBox1.Height）;
????????????for?（float?x?=?m_ptCanvas.X;?x?????????????????g.DrawLine（Pens.Cyan?x?0?x?pictureBox1.Height）;
????????????for?（float?y?=?m_ptCanvas.Y;?y?>?0;?y?-=?nIncrement）
????????????????g.DrawLine（Pens.Cyan?0?y?pictureBox1.Width?y）;
????????????for?（float?y?=?m_ptCanvas.Y;?y?????????????????g.DrawLine（Pens.Cyan?0?y?pictureBox1.Width?y）;
????????????//計算屏幕左上角?和?右下角?對應畫布上的坐標
????????????Size?szTemp?=

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2012-10-26?23:42??ImageScale\
?????目錄???????????0??2012-10-26?23:43??ImageScale\ImageScale\
?????文件?????????872??2012-10-26?23:42??ImageScale\ImageScale.sln
?????文件???????17920??2012-10-28?18:51??ImageScale\ImageScale.suo
?????目錄???????????0??2012-10-26?23:42??ImageScale\ImageScale\bin\
?????目錄???????????0??2012-10-26?23:45??ImageScale\ImageScale\bin\Debug\
?????文件???????12288??2012-10-29?02:59??ImageScale\ImageScale\bin\Debug\ImageScale.exe
?????文件???????28160??2012-10-29?02:59??ImageScale\ImageScale\bin\Debug\ImageScale.pdb
?????文件???????11608??2012-10-29?03:01??ImageScale\ImageScale\bin\Debug\ImageScale.vshost.exe
?????文件?????????490??2010-03-17?22:39??ImageScale\ImageScale\bin\Debug\ImageScale.vshost.exe.manifest
?????文件????????7623??2012-10-29?02:59??ImageScale\ImageScale\Form1.cs
?????文件????????2498??2012-10-29?02:15??ImageScale\ImageScale\Form1.Designer.cs
?????文件????????5817??2012-10-28?17:08??ImageScale\ImageScale\Form1.resx
?????文件????????3427??2012-10-26?23:45??ImageScale\ImageScale\ImageScale.csproj
?????目錄???????????0??2012-10-26?23:42??ImageScale\ImageScale\obj\
?????目錄???????????0??2012-10-26?23:42??ImageScale\ImageScale\obj\x86\
?????目錄???????????0??2012-10-29?02:59??ImageScale\ImageScale\obj\x86\Debug\
?????文件????????5422??2012-10-29?02:59??ImageScale\ImageScale\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache
?????文件????????1028??2012-10-29?03:01??ImageScale\ImageScale\obj\x86\Debug\ImageScale.csproj.FileListAbsolute.txt
?????文件???????12288??2012-10-29?02:59??ImageScale\ImageScale\obj\x86\Debug\ImageScale.exe
?????文件?????????180??2012-10-28?17:08??ImageScale\ImageScale\obj\x86\Debug\ImageScale.Form1.resources
?????文件???????28160??2012-10-29?02:59??ImageScale\ImageScale\obj\x86\Debug\ImageScale.pdb
?????文件?????????180??2012-10-26?23:45??ImageScale\ImageScale\obj\x86\Debug\ImageScale.Properties.Resources.resources
?????文件????????3970??2012-10-28?17:08??ImageScale\ImageScale\obj\x86\Debug\ResGen.read.1.tlog
?????文件????????1324??2012-10-28?17:08??ImageScale\ImageScale\obj\x86\Debug\ResGen.write.1.tlog
?????目錄???????????0??2012-10-26?23:42??ImageScale\ImageScale\obj\x86\Debug\TempPE\
?????文件?????????473??2012-10-26?23:42??ImageScale\ImageScale\Program.cs
?????目錄???????????0??2012-10-26?23:42??ImageScale\ImageScale\Properties\
?????文件????????1450??2012-10-26?23:42??ImageScale\ImageScale\Properties\AssemblyInfo.cs
?????文件????????2765??2012-10-26?23:42??ImageScale\ImageScale\Properties\Resources.Designer.cs
?????文件????????5612??2012-10-26?23:42??ImageScale\ImageScale\Properties\Resources.resx
............此處省略2個文件信息