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企業級控件庫中的圖片浏覽控件

編輯：關於C語言

在上兩篇：我介紹了原創企業級控件庫之組合查詢控件和原創企業級控件庫之大數據量分頁控件，受到了很多朋友的支持，給了我很大的動力，在此我特表感謝。有的朋友要求把源碼提供上來，我在第一篇就講了，源碼會在我這個系列講完之後提供，大家先別著急，如果你確實需要，可以時常關注此系列，謝謝大家。其實，在系列文章中，我已把核心代碼貢獻出來了。學習有時是參考別人與實踐別人的勞動成果的過程，你光把別人的代碼拿過來用用，不研究其實質，進步很慢。

這篇我將給大家介紹：企業級控件庫之圖片浏覽控件。

摘要

我想大家用過或聽說過ACDSee 對於圖片浏覽的強大功能，我接下來介紹的控件與ACDSee相比，可謂是天壤之別，雖沒有其強大的功能，但用在一些常用的軟件上，提供一些常用的基本功能還是可以的。同時，我只提供一個模子，代碼開源，你可以隨便修改以滿足自己的需要。

成就別人、等於成就自己。我沒什麼要求，歡迎大家多多支持與評論，覺得不錯的，記得點擊文章左下角的”關注博客”，就這麼簡單。同時，你要用什麼好的想法，也可以與我交流，謝謝。

圖片浏覽控件運行效果如下圖：

本控件類圖：

本控件類詳細信息：

本控件核心代碼:　

滾動鼠標滾輪實現鼠標縮放

#region 滾動鼠標滾輪實現鼠標縮放
 /************************************************************   
 * 滾動鼠標滾輪實現鼠標縮放   
************************************************************/   
   private void picVIEw_MouseWheel(object sender, MouseEventArgs e)   
      {   
  switch (keyAction)  
     {   
      case 1:  
        if (e.Delta > 0 && picVIEw.Width < 10000)  
                  {  
             zoom(e.Location, 1100);  
           }  
             else if (e.Delta < 0 && picView.Image.Width / picVIEw.Width < 5)  
            {  
                   zoom(e.Location, 900);  
      }  
          CenterImage();//使圖片居中顯示  
        break;  
      case 2:  
    if (hScrollBarImageVIEw.Visible)  
hScrollBarImageView.Value = (hScrollBarImageView.Value - e.Delta < 0 ? 0 : (hScrollBarImageView.Value - e.Delta > hScrollBarImageView.Maximum ? hScrollBarImageView.Maximum : hScrollBarImageVIEw.Value - e.Delta));  
                   break;  
              default:  
            if (vScrollBarImageVIEw.Visible)  
vScrollBarImageView.Value = (vScrollBarImageView.Value - e.Delta < 0 ? 0 : (vScrollBarImageView.Value - e.Delta > vScrollBarImageView.Maximum ? vScrollBarImageView.Maximum : vScrollBarImageVIEw.Value - e.Delta));  
       break;  
   }  
      }  
       #endregion

下面給出整個控件的完整代碼及窗體調用方法：

一、控件完整代碼：

圖像顯示控件

#region  版權信息   
 /*---------------------------------------------------------------------*    
 // Copyright (C) 2010 http://www.cnblogs.com/huyong    
// 版權所有。    
 // 項目  名稱：《Winform通用控件庫》   
// 文  件  名： UcImageVIEw.cs   
 // 類  全  名： DotNet.Controls.UcImageVIEw     
// 描      述:  圖像顯示控件   
 // 創建  時間： 2010-08-05   
 // 創建人信息： [**** 姓名:胡勇 QQ:80368704 E-Mail:[email protected] *****]   
 *----------------------------------------------------------------------*/   
#endregion  
using System;   
 using System.ComponentModel;  
using System.Drawing;   
using System.Windows.Forms;   
 using System.Drawing.Printing;   
using DotNet.Common;   
 namespace DotNet.Controls   
 {   
    /// <summary> 
/// 圖像顯示控件  
/// UcImageVIEw   
    ///  
/// 修改紀錄  
///     2010-11-6  胡勇 優化相關代碼。   
   ///     2010-8-5   胡勇 創建圖像顯示控件  
///       
   /// <author>   
     ///     <name>胡勇</name>   
   ///     <QQ>80368704</QQ> 
///     <Email>[email protected]</Email>   
   /// </author>   
   /// </summary>   
    public partial class UcImageVIEw : UserControl   
  {  
    #region 構造函數   
       public UcImageVIEw()  
     {   
          InitializeComponent();   
       //記錄PnlMain的size   
          panelOldSize.X = PnlMain.Width;   
           panelOldSize.Y = PnlMain.Height;   
     }  
         #endregion   
#region 公共變量   
       private Point StartP = new Point(0, 0);   
    private bool isMouseDown = false;  
private Point panelOldSize = new Point(0, 0);   
         private int imgIndexBy1000 = 0;   
         private int keyAction = 0;   
       private int w, h;   
    #endregion   
        #region 公共事件   
[Category("圖片浏覽"), Description("移動或漫游圖片的Checked事件Changed時發生。"), Browsable(true)]   
      public event EventHandler OnMnuMoveImageCheckedChanged;  
#endregion   
        #region 公共方法   
#region 增加圖片到PictureBox:void AddImage(string fileName, bool isAsync)   
       /// <summary>   
     /// 增加要顯示的圖片   
      /// </summary>   
       /// <param name="fileName">圖片路徑全名</param>   
     /// <param name="isAsync">true:異步方式加載圖片</param> 
    public void AddImage(string fileName, bool isAsync)   
      {   
         if (isAsync)//異步加載圖片  
{   
                //圖片異步加載完成後的處理事件   
                picView.LoadCompleted += new AsyncCompletedEventHandler(picVIEw_LoadCompleted);   
              //圖片加裁時，顯示等待光標  
picVIEw.UseWaitCursor = true; 81                 //采用異步加裁方式 82                 picVIEw.WaitOnLoad = false; 83                 //開始異步加裁圖片 84                 picVIEw.LoadAsync(fileName); 85             } 86             else 87             { 88                 picVIEw.Image = Image.FromFile(fileName);//載入圖片 89             } 90  91             InitialImage(); 92             93         } 94  95         /// <summary> 96         /// 增加要顯示的圖片 97         /// </summary> 98         /// <param name="img">Image</param> 99         public void AddImage(Image img)100         {101             if (img != null)102             {103                 picVIEw.Image = img;104                 InitialImage();105             }106             else107             {108                 picVIEw = null;109             }110         }111         #endregion112 113         #region 得到ImageView中的圖片:Image GetImageInImageVIEw()114         /// <summary>115         /// 得到ImageVIEw中的圖片116         /// </summary>117         /// <returns>Image</returns>118         public Image GetImageInImageView()119         {120             if (picView.Image != null)121             {122                 return picVIEw.Image;123             }124             else125             {126                 return null;127             }128         }129         #endregion130 131         #region 放大、縮小、適應圖片大小、移動圖片、左旋轉圖片與右旋轉圖片132         /// <summary>133         /// 放大圖片134         /// </summary>135         public void ZoomInImage()136         {137             if (picView.Image != null)138             {139                 if (picVIEw.Width < 5000)140                 {141                     zoom(picVIEw.Location, 1100);142                     CenterImage();143                 }144                 else145                 {146                     MessageBox.Show("對不起，不能再進行放大!","提示信息",MessageBoxButtons.OK,MessageBoxIcon.Information);147                 }148             }149         }150         151         /// <summary>152         /// 縮小圖片153         /// </summary>154         public void ZoomOutImage()155         {156             if (picView.Image != null)157             {158                 if (picView.Image.Width / picVIEw.Width < 5 && -7 < 0)159                 {160                     zoom(picVIEw.Location, 900);161                     CenterImage();162                 }163                 else164                 {165                     MessageBox.Show("對不起，不能再進行縮小!", "提示信息", MessageBoxButtons.OK, MessageBoxIcon.Information);166                 }167             }168         }169 170         /// <summary>171         /// 適應圖片大小172         /// </summary>173         public void FitImageSize()174         {175             if (picVIEw.Image != null)176             {177                 float r1 = (float)this.w / this.picVIEw.Width;178                 float r2 = (float)this.h / this.picView.Height;179                 this.picVIEw.Scale(r1, r2);180                 this.picVIEw.Left = (this.PnlMain.Width - this.picVIEw.Width) / 2;181                 this.picVIEw.Top = (this.PnlMain.Height - this.picVIEw.Height) / 2;182                 this.picVIEw.Cursor = Cursors.Default;183                 CenterImage();184             }185         }186 187         /// <summary>188         /// 移動圖片189         /// </summary>190         public void MoveImage()191         {192             mnuMy.Checked = MnuMoveImageChecked;193         }194 195         /// <summary>196         /// 左旋轉圖片197         /// </summary>198         public void LeftRotateImage()199         {200             if (picView.Image != null)201             {202                 picView.Image.RotateFlip(RotateFlipType.Rotate90FlipX);203                 picVIEw.Refresh();204                 CenterImage();205             }206         }207 208         /// <summary>209         /// 右旋轉圖片210         /// </summary>211         public void RightRotateImage()212         {213             if (picView.Image != null)214             {215                 picView.Image.RotateFlip(RotateFlipType.Rotate90FlipY);216                 picVIEw.Refresh();217                 CenterImage();218             }219         }220         #endregion221 222         #endregion223 224         #region 公共屬性225         private bool _mnuMoveImageChecked;226         /// <summary>227         /// 確定漫游菜單項是否處於選中狀態(用於是否可以移動或漫游圖片)228         /// </summary>229         [Category("圖片浏覽"), Description("確定漫游菜單項是否處於選中狀態(用於是否可以移動或漫游圖片)"),Browsable(false)]230         public bool MnuMoveImageChecked231         {232             get233             {234                 return _mnuMoveImageChecked;235             }236             set237             {238                 _mnuMoveImageChecked = value;239                 this.mnuMy.Checked = _mnuMoveImageChecked;240             }241         }242 243         private bool _mnuPrintVisible = true; //默認可見244         /// <summary>245         /// 確定打印菜單項是可見還是隱藏246         /// </summary>247         [Category("圖片浏覽"), Description("確定打印菜單項是可見還是隱藏"), Browsable(true)]248         public bool MnuPrintVisible249         {250             get251             {252                 return _mnuPrintVisible;253             }254             set255             {256                 _mnuPrintVisible = value;257                 this.mnuPrint.Visible = _mnuPrintVisible;258             }259         }260         #endregion261 262         #region 私有方法263 264         private void picVIEw_LoadCompleted(object sender, AsyncCompletedEventArgs e)265         {266             //圖片加載完成後，將光標恢復267             picVIEw.UseWaitCursor = false;268         }269 270         #region 圖片縮放271         /// <summary>272         /// 圖片縮放273         /// </summary>274         /// <param name="center">縮放中心點</param>275         /// <param name="zoomIndexBy1000">縮放倍率的1000倍</param>276         private void zoom(Point center, int zoomIndexBy1000)277         {278             //記錄原始的picVIEw的Size279             Point oldSize = new Point(picView.Width, picView.Height);280             //實施放大（以x方向為基准計算得出y方向大小，防止多次運算誤差積累使Image和picVIEw的尺寸不匹配）281             picVIEwpicVIEw.Width = picVIEw.Width * zoomIndexBy1000 / 1000;282             picVIEwpicVIEw.Height = picView.Width * imgIndexBy1000 / 1000;283             //重新定位標定後的picView位置284             picVIEw.Left -= ((picView.Width - oldSize.X) * (center.X * 1000 / oldSize.X)) / 1000;285             picVIEw.Top -= ((picView.Height - oldSize.Y) * (center.Y * 1000 / oldSize.Y)) / 1000;286             //重新設定橫向滾動條最大值和位置287             if (picVIEw.Width - PnlMain.Width > 0)288             {289                 hScrollBarImageVIEw.Visible = true;290                 hScrollBarImageVIEw.Maximum = picVIEw.Width - PnlMain.Width + vScrollBarImageVIEw.Width + 2;291                 hScrollBarImageVIEw.Value = (picVIEw.Left >= 0 ? 0 : (-picVIEw.Left > hScrollBarImageView.Maximum ? hScrollBarImageView.Maximum : -picVIEw.Left));292             }293             else294             {295                 hScrollBarImageVIEw.Visible = false;296             }297             //重新設定縱向滾動條最大值和位置298             if (picVIEw.Height - PnlMain.Height > 0)299             {300                 vScrollBarImageVIEw.Visible = true;301                 vScrollBarImageVIEw.Maximum = picVIEw.Height - PnlMain.Height + hScrollBarImageVIEw.Width + 2;302                 vScrollBarImageVIEw.Value = (picVIEw.Top >= 0 ? 0 : (-picVIEw.Top > vScrollBarImageView.Maximum ? vScrollBarImageView.Maximum : -picVIEw.Top));303             }304             else305             {306                 vScrollBarImageVIEw.Visible = false;307             }308         }309         #endregion310 311         #region 圖片加裁到PictureBox中後，對其進行初始化操作312         /// <summary>313         /// 圖片加裁到PictureBox中後，對其進行初始化操作314         /// </summary>315         private void InitialImage()316         {317             ImageChange();//得到最適合顯示的圖片尺寸318             thisthis.w = this.picVIEw.Width;319             thisthis.h = this.picVIEw.Height;320 321             //設定圖片位置322             picVIEw.Location = new Point(0, 0);323             //設定圖片初始尺寸324             picVIEwpicVIEw.Size = picVIEw.Image.Size;325             //設定圖片縱橫比326             imgIndexBy1000 = (picView.Image.Height * 1000) / picView.Image.Width;327             //設定滾動條328             if (picVIEw.Width - PnlMain.Width > 0)329             {330                 hScrollBarImageVIEw.Maximum = picVIEw.Width - PnlMain.Width + vScrollBarImageView.Width + 2;//+ hScrollBarImageVIEw.LargeChange331                 hScrollBarImageVIEw.Visible = true;332             }333             if (picVIEw.Height - PnlMain.Height > 0)334             {335                 vScrollBarImageVIEw.Maximum = picVIEw.Height - PnlMain.Height + hScrollBarImageView.Height + 2;//+ vScrollBarImageVIEw.LargeChange336                 vScrollBarImageVIEw.Visible = true;337             }338             CenterImage();339         }340         #endregion341 342         #region 居中與全屏顯示圖片343 344         /// <summary>345         /// 使圖片全屏顯示346         /// </summary>347         private void FullImage()348         {349             if (picVIEw.Image.Width < picVIEw.Width && picVIEw.Image.Height < picVIEw.Height)350             {351                 picVIEw.SizeMode = PictureBoxSizeMode.CenterImage;352             }353             CalculateASPectRatioAndSetDimensions();354         }355 356 357         /// <summary>358         /// 保持圖片居中顯示359         /// </summary>360         private void CenterImage()361         {362             picVIEw.Left = PnlMain.Width / 2 - picVIEw.Width / 2;363             picVIEw.Top = PnlMain.Height / 2 - picVIEw.Height / 2;364         }365 366         #endregion367 368         #region CalculateASPectRatioAndSetDimensions369         /// <summary>370         /// CalculateASPectRatioAndSetDimensions371         /// </summary>372         /// <returns>double</returns>373         private double CalculateASPectRatioAndSetDimensions()374         {375             double ratio;376             if (picVIEw.Image.Width > picVIEw.Image.Height)377             {378                 ratio = picVIEw.Image.Width / picVIEw.Image.Height;379                 picVIEw.Height = Convert.ToInt16(double.Parse(picVIEw.Width.ToString()) / ratio);380             }381             else382             {383                 ratio = picVIEw.Image.Height / picVIEw.Image.Width;384                 picVIEw.Width = Convert.ToInt16(double.Parse(picVIEw.Height.ToString()) / ratio);385             }386             return ratio;387         }388         #endregion389 390         #region 用於適應圖片大小391         /// <summary>392         /// 用於適應圖片大小393         /// </summary>394         private void ImageChange()395         {396             thisthis.picVIEw.Height = this.picVIEw.Image.Height;397             thisthis.picVIEw.Width = this.picVIEw.Image.Width;398             float cx = 1;399             if (this.picVIEw.Image.Height > this.PnlMain.Height) cx =400                 (float)(this.PnlMain.Height - 10) / (float)this.picView.Image.Height;401 402             this.picVIEw.Scale(cx);403             this.picVIEw.Left = (this.PnlMain.Width - this.picVIEw.Width) / 2;404             this.picVIEw.Top = (this.PnlMain.Height - this.picView.Height) / 2;405         }406         #endregion407 408         #endregion409 410         #region 窗口（PnlMain）尺寸改變時圖像的顯示位置控制411         /************************************************************412          * 窗口（PnlMain）尺寸改變時圖像的顯示位置控制413          ************************************************************/414         private void PnlMain_Resize(object sender, EventArgs e)415         {416             //對左右的方向操作（左右）417             if (picVIEw.Width <= PnlMain.Width) //圖片左右居中418             {419                 picVIEw.Left = (PnlMain.Width - picVIEw.Width) / 2;420                 hScrollBarImageVIEw.Visible = false;421             }422             else if (picVIEw.Left < 0 && picView.Width + picVIEw.Left < PnlMain.Width)//圖片靠右423             {424                 picVIEw.Left = PnlMain.Width - picVIEw.Width;425                 hScrollBarImageVIEw.Visible = true;426             }427             else if (picVIEw.Left > 0 && picView.Width + picVIEw.Left > PnlMain.Width)//圖片靠左428             {429                 picVIEw.Left = 0;430                 hScrollBarImageVIEw.Visible = true;431             }432             else//保證顯示的中心圖樣不變（左右）433             {434                 picVIEw.Left += (PnlMain.Width - panelOldSize.X) / 2;435                 hScrollBarImageVIEw.Visible = true;436             }437             //設定橫向滾動條最大值438             hScrollBarImageVIEw.Maximum = (picVIEw.Width - PnlMain.Width > 0 ? picView.Width - PnlMain.Width + hScrollBarImageVIEw.Maximum + 2 : 0);439             //設定橫向滾動條Value440             hScrollBarImageVIEw.Value = (picVIEw.Left >= 0 ? 0 : -picVIEw.Left);441             //重置舊的pannel1的Width442             panelOldSize.X = PnlMain.Width;443 444             //對上下的方向操作（上下）445             if (picVIEw.Height <= PnlMain.Height)//圖片上下居中446             {447                 picVIEw.Top = (PnlMain.Height - picVIEw.Height) / 2;448                 vScrollBarImageVIEw.Visible = false;449             }450             else if (picVIEw.Top < 0 && picView.Height + picVIEw.Top < PnlMain.Height)//圖片靠下451             {452                 picVIEw.Top = PnlMain.Height - picVIEw.Height;453                 vScrollBarImageVIEw.Visible = true;454             }455             else if (picVIEw.Top > 0 && picView.Height + picVIEw.Top > PnlMain.Height)//圖片靠上456             {457                 picVIEw.Top = 0;458                 vScrollBarImageVIEw.Visible = true;459             }460             else//保證顯示的中心圖樣不變（上下）461             {462                 picVIEw.Top += (PnlMain.Height - panelOldSize.Y) / 2;463                 vScrollBarImageVIEw.Visible = true;464             }465             //設定縱向滾動條最大值466             vScrollBarImageVIEw.Maximum = (picVIEw.Height - PnlMain.Height > 0 ? picView.Height - PnlMain.Height + vScrollBarImageVIEw.Maximum + 2 : 0);467             //設定縱向滾動條Value468             vScrollBarImageVIEw.Value = (picVIEw.Top >= 0 ? 0 : -picVIEw.Top);469             //重置舊的pannel1的Height470             panelOldSize.Y = PnlMain.Height;471         }472         #endregion473 474         #region 滾動條滾動時，圖片移動475         /************************************************************476          * 滾動條滾動時，圖片移動477          ************************************************************/478         private void vScrollBarImageVIEw_ValueChanged(object sender, EventArgs e)479         {480             picVIEw.Top = -vScrollBarImageView.Value;481         }482 483         private void hScrollBarImageVIEw_ValueChanged(object sender, EventArgs e)484         {485             picVIEw.Left = -hScrollBarImageView.Value;486         }487         #endregion488 489         #region PictureBox 鼠標按下、鼠標進入、松開與移動事件490         private void picVIEw_MouseDown(object sender, MouseEventArgs e)491         {492             StartP = e.Location;493             isMouseDown = true;494         }495 496         private void picView_MouseEnter(object sender, EventArgs e)497         {498             picView.Focus();499         }500 501         private void picVIEw_MouseMove(object sender, MouseEventArgs e)502         {503             if (mnuMy.Checked && isMouseDown)504             {505                 this.picVIEw.Cursor = Cursors.SizeAll;506                 //計算出移動後兩個滾動條應該的Value507                 int x = -picVIEw.Left + StartP.X - e.X;508                 int y = -picVIEw.Top + StartP.Y - e.Y;509 510                 //如果滾動條的value有效則執行操作；511                 if (x >= -PnlMain.Width + 10 && x <= picView.Width - 10)512                 {513                     if (hScrollBarImageVIEw.Visible)514                     {515                         if (x > 0)516                             hScrollBarImageVIEw.Value = x > hScrollBarImageView.Maximum ? hScrollBarImageVIEw.Maximum : x;517                         picVIEw.Left = -x - (vScrollBarImageVIEw.Visible && x < 0 ? vScrollBarImageVIEw.Width : 0);518                     }519                     else520                         picVIEw.Left = -x;521                 }522                 523                 if (y >= -PnlMain.Height + 10 && y <= picView.Height - 10)524                 {525                     if (vScrollBarImageVIEw.Visible)526                     {527                         if (y > 0)528                             vScrollBarImageVIEw.Value = y > vScrollBarImageView.Maximum ? vScrollBarImageVIEw.Maximum : y;529                         picVIEw.Top = -y - (hScrollBarImageVIEw.Visible && y < 0 ? hScrollBarImageVIEw.Height : 0);530                     }531                     else532                         picVIEw.Top = -y;533                 }534 535 536                 /*****************************************************537                  * 給予調整滾動條調整圖片位置538                  *****************************************************539                 計算出移動後兩個滾動條應該的Value*/540                 /*int w = hScrollBarImageVIEw.Value + StartP.X -e.X;541                 int z = vScrollBarImageVIEw.Value + StartP.Y -e.Y;542                 如果滾動條的value有效則執行操作；543                 否則將滾動條按不同情況拉到兩頭544                 if (w >= 0 && w <= hScrollBarImageVIEw.Maximum)545                 {546                     hScrollBarImageVIEw.Value = w;547                 }548                 else549                 {550                     hScrollBarImageVIEw.Value = (w < 0 ? 0 : hScrollBarImageVIEw.Maximum);551                 }552                 if (z >= 0 && z <= vScrollBarImageVIEw.Maximum)553                 {554                     vScrollBarImageVIEw.Value = z;555                 }556                 else557                 {558                     vScrollBarImageVIEw.Value = (z < 0 ? 0 : vScrollBarImageVIEw.Maximum);559                 }*/560             }561             else562             {563                 this.picVIEw.Cursor = Cursors.Default;564             }565         }566 567         private void picVIEw_MouseUp(object sender, MouseEventArgs e)568         {569             isMouseDown = false;570         }571         #endregion572 573         #region 滾動鼠標滾輪實現鼠標縮放574         /************************************************************575          * 滾動鼠標滾輪實現鼠標縮放576          ************************************************************/577         private void picVIEw_MouseWheel(object sender, MouseEventArgs e)578         {579             switch (keyAction)580             {581                 case 1:582                     if (e.Delta > 0 && picVIEw.Width < 10000)583                     {584                         zoom(e.Location, 1100);585                     }586                     else if (e.Delta < 0 && picView.Image.Width / picVIEw.Width < 5)587                     {588                         zoom(e.Location, 900);589                     }590                     CenterImage();//使圖片居中顯示591                     break;592                 case 2:593                     if (hScrollBarImageVIEw.Visible)594                         hScrollBarImageVIEw.Value = (hScrollBarImageVIEw.Value - e.Delta < 0 ? 0 : (hScrollBarImageVIEw.Value - e.Delta > hScrollBarImageView.Maximum ? hScrollBarImageView.Maximum : hScrollBarImageView.Value - e.Delta));595                     break;596                 default:597                     if (vScrollBarImageVIEw.Visible)598                         vScrollBarImageVIEw.Value = (vScrollBarImageVIEw.Value - e.Delta < 0 ? 0 : (vScrollBarImageVIEw.Value - e.Delta > vScrollBarImageView.Maximum ? vScrollBarImageView.Maximum : vScrollBarImageView.Value - e.Delta));599                     break;600             }601         }602         #endregion603 604         #region 窗體按鍵事件處理605 606         private void UcImageVIEw_KeyDown(object sender, KeyEventArgs e)607         {608             if (e.Control)609                 keyAction = 1;610             else if (e.Shift)611                 keyAction = 2;612         }613 614         private void UcImageVIEw_KeyUp(object sender, KeyEventArgs e)615         {616             keyAction = 0;617         } 618 619         private void picVIEw_KeyDown(object sender, KeyEventArgs e)620         {621             if (e.Control)622                 keyAction = 1;623             else if (e.Shift)624                 keyAction = 2;625             else626                 keyAction = 3;627         }628         private void picVIEw_KeyUp(object sender, KeyEventArgs e)629         {630             keyAction = 0;631         }632         #endregion633 634         #region 快捷菜單事件代碼635         //放大圖片636         private void mnuZoomIn_Click(object sender, EventArgs e)637         {638             this.ZoomInImage();639         }640 641         //縮小圖片642         private void mnuZoomOut_Click(object sender, EventArgs e)643         {644             this.ZoomOutImage();645         }646 647         //適應圖片大小648         private void mnuFitSize_Click(object sender, EventArgs e)649         {650             this.FitImageSize();651         }652 653         //漫游圖片654         private void mnuMy_Click(object sender, EventArgs e)655         {656             MnuMoveImageChecked = !mnuMy.Checked;657             this.MoveImage();658         }659 660         //左旋轉圖片661         private void mnuLeftRotate_Click(object sender, EventArgs e)662         {663             this.LeftRotateImage();664         }665 666         //右旋轉圖片667         private void mnuRightRotate_Click(object sender, EventArgs e)668         {669             this.RightRotateImage();670         }671 672         #region 打印圖片673         //打印圖片674         private void mnuPrint_Click(object sender, EventArgs e)675         {676             if (picVIEw.Image != null)677             {678                 PrintDialog printDgImageVIEw = new PrintDialog();679 680                 /*設置紙張類型681                 PaperSize pg = new PaperSize("A3",297,420);682                 printDocImageVIEw.DefaultPageSettings.PaperSize = pg;*/683                 PaperSize pg = new PaperSize("A3", 23, 33);684                 printDgImageVIEw.Document = printDocImageVIEw;685                 if (printDgImageView.ShowDialog() == DialogResult.OK)686                 {687                     try688                     {689                         printDocImageView.Print();690                     }691                     catch692                     {693                         //停止打印694                         printDocImageView.PrintController.OnEndPrint(printDocImageView, new System.Drawing.Printing.PrintEventArgs());695                     }696                 }697             }698             else699             {700                 DialogHelper.ShowWarningMsg("對不起，沒有要打印的數據!");701             }702         }703 704         private void printDocImageView_PrintPage(object sender, PrintPageEventArgs e)705         {706             this.FitImageSize();//實際尺寸707             if (picView.Image != null)708             {709                 e.Graphics.DrawImage(picView.Image, picView.Location.X, picView.Location.Y, picView.Width, picVIEw.Height);710             }711         }712         #endregion713 714         #endregion715 716         #region 窗體事件717         private void mnuMy_CheckedChanged(object sender, EventArgs e)718         {719             if (OnMnuMoveImageCheckedChanged != null)720             {721                 MnuMoveImageChecked = this.mnuMy.Checked;722                 OnMnuMoveImageCheckedChanged(sender, EventArgs.Empty);723             }724         }725         #endregion726     }727 }

二、WinForm窗體調用方法完整代碼：

WinForm窗體調用UcImageVIEw控件完整代碼

using System;   
 using System.Collections.Generic;   
 using System.ComponentModel;   
using System.Data;   
using System.Drawing;   
using System.Text;   
using System.Windows.Forms;   
 using DotNet.Common;   
namespace DotNet.WinForm.Example11 {  
    public partial class FrmUcImageVIEw : Form13     {  
       public FrmUcImageVIEw()  
        {  
          InitializeComponent();  
        }  
private void FrmUcImageVIEw_Shown(object sender, EventArgs e)  
        {  
            try 
          {  
                ucImageVIEwTest.AddImage(Image.FromFile(Application.StartupPath + "\\Windows7.jpg"));  
             }  
             catch(Exception ex)  
             {  
                DialogHelper.ShowErrorMsg(ex.Message);  
            }  
        }  
         private void btnAdd_Click(object sender, EventArgs e)  
        {  
 openImgDlg.Filter = "Image Files(*.jpg;*.jpeg;*.tiff;*.gif)|*.jpg;*.gpeg;*.tiff;*.gif|All files (*.*)|*.*";//圖片文件的類型  
             if (openImgDlg.ShowDialog() == DialogResult.OK)  
             {  
                 string FileName, pathName;  
                pathName = openImgDlg.FileName;  
                FileName = FileHelper.GetName(pathName);  
                 ucImageVIEwTest.AddImage(Image.FromFile(pathName));  
            }  
         }  
         private void btnZoomIn_Click(object sender, EventArgs e)  
         {  
             ucImageVIEwTest.ZoomInImage();  
        }  
        private void btnZoomOut_Click(object sender, EventArgs e)  
      {  
        ucImageVIEwTest.ZoomOutImage();  
        }  
   
     private void btnMy_Click(object sender, EventArgs e)  
    {  
          btnMy.Checked = ucImageVIEwTest.MnuMoveImageChecked = !btnMy.Checked;  
           ucImageVIEwTest.MoveImage();  
        }  
       private void btnFitSize_Click(object sender, EventArgs e)  
      {  
          ucImageVIEwTest.FitImageSize();  
         }  
private void btnLeftRotate_Click(object sender, EventArgs e)  
     {  
        ucImageVIEwTest.LeftRotateImage();  
        }  
        private void btnRightRotate_Click(object sender, EventArgs e)  
     {  
        ucImageVIEwTest.RightRotateImage();  
     }  
        private void ucImageVIEwTest_OnMnuMoveImageCheckedChanged(object sender, EventArgs e)  
      {  
     //使ucImageVIEwDj中的快捷菜單中的漫游的選中狀態與當前窗口漫游按鈕的選中狀態保持一至  
           btnMy.Checked = ucImageVIEwTest.MnuMoveImageChecked;  
     }  
    private void btnExit_Click(object sender, EventArgs e)  
       {  
           this.Close();  
       }  
   }  
 }