《ArcGISEngine+C#實例開發教程》第一講:桌面GIS應用程序框架的建立講主要是使用MapControl、PageLayoutControlToolbarControl,TOCControl四個控件建立起基本的桌面GIS應用程序框架。最終成果預覽如下:1、新建項目啟動VS2005,選擇“文件丨新建|項目”,在項目類型中選擇VisualC#,再選擇Windows應用程序模板,輸入名稱“3sdnMap”,點擊確定。在解決方案管理器中將“Forml.cs”重命名為“3sdnMap.cs”，在設計視圖中，選中窗體，將其屬性中的“Text”改為“3sdnMap”〇2、添加控件選擇工具箱中的“菜單和工具欄IMenuStrip”,將其拖入窗體。選擇工具箱中的“ArcGISWindowsForms"節，將“ToolbarControl”控件拖入窗體，并將其屬性中的Dock設置為Top。選擇工具箱中的“菜單和工具欄|StatusStrip”，將其拖入到窗體。選擇工具箱中的“容器ISplitContainer”容器拖入窗體，并將其屬性中的Dock設置為Fillo將TabControl控件拖入Panell,將Alignment屬性設置為Bottom,Dock屬性設置為Fill。點擊TabPages屬性右邊的按鈕，彈出TabPage集合編輯器，將tabPagel的Name設置為tabPageLayer,Text設置為圖層，將tabPage2的Name設置為tabPageProperty,Text設置為屬性。如下所示。選擇“圖層”選項卡,拖入TOCControl控件,設置Dock屬性為Fill。選擇"屬性"選項卡,拖入PropertyGrid控件（"工具箱丨所有Windows窗體PropertyGrid"）,設置Dock屬性為Fill。拖入TabControl控件到Panel2,設置Dock屬性為Fill。并上述類似的方法,將兩個選項卡的Name和Text分別設置為:（tabPageMap、地圖），（tabPageLayout,制版）。選擇“地圖”選項卡,拖入MapControl控件，設置Dock屬性為Fill。選擇“制版"選項卡,拖入PageLayoutControl控件，設置Dock屬性為Fill。最后將LicenseContro!控件拖入到窗體的任意地方。按F5編譯運行，可以看到剛オ布局好的程序界面了。3、控件綁定通過以上步驟添加的控件還只是單獨存在，而我們的程序需要各控件間協同工作，因此要進行控件綁定。分別右擊ToolbarControl、TOCControl控件，將Buddy設置為axMapControll,如下圖所示。這樣,工具條和圖層控件就與地圖控件關聯了。4,添加工具此時,工具條中還沒有任何工具,添加的方法也很簡單。右擊ToolbarControl,選擇"屬性丨Items”,點擊Add,選擇Commands選項卡中的Generic,雙擊Open、SaveAs、Redo、Undo即可將相應工具添加到工具條。常見的工具有:MapNavigation中的導航工具,MapInquiry中的查詢工具,FeatureSelection中的選擇工具,你可以根據需要酌情添加工具。5、編譯運行按F5即可編譯運行程序，至此桌面GIS應用程序框架基本框架已經搭建好了，你可以通過工具條的工具打開地圖文檔,瀏覽地圖了，效果如開篇所示。下ー講中將大家帶來的是菜單的添加及其實現,敬請關注3SDN.NET〇第二講菜單的添加及其實現在這ー講中，主要講解菜單的添加和實現。1、添加菜單在設計視圖中,單擊菜單欄,會出現“請在此處鍵入”的提示，單擊提示就可以鍵入菜單名稱，如“文件”,再單擊“文件”,即可輸入其下拉子菜單,如下所示:Tips：每創建一個菜單,請在其屬性面板中設置Name屬性，而且不要為中文,因此Name值將是此菜單響應函數的函數名的一部分，帶中文的函數名，總是不好吧。本講中,我們將添加新建（New）、打開（Open）、添加數據（AddData）、保存（Save）、另存為（SaveAs）、退出（Exit）這些菜單,（）內為相應的Name屬性值。Tips:你可以在屬性面板中的Text屬性中,把菜單名設置為中英文形式,如“打開〇pen”,帶下劃線的〇表示此項菜單的快捷鍵是字母〇,設置方法是在相應字母前加上“&"字符,如“打開&Open”。但這種快捷鍵只在打開此下拉菜單時才有效,即當你單擊“文件”菜單彈出下拉菜單時,按下字母O就可以定位到“打開”菜單。還有一種在程序運行時都有效的全局快捷鍵，可以在屬性面板中的“ShortCutKeys”中設置。你還可以在屬性面板中的Image屬性中設置你喜歡的菜單圖標。單擊Image那一行右邊的按鈕,彈出如下菜單。選擇“項目資源文件”，再單擊導入就可以選擇你的圖標了。最終效果如下所示。注意，在解決方案面板中，選中剛オ添加的所有圖標,在其屬性面板中將生成操作設置為“嵌入的資源”,這一點很重要!2、實現相關菜單首先定義指針（寫在publicpartialclassForml:Form下面即可）：privateESRLArcGIS.Controls.IMapControl3m_mapControl=null;privateESRI.ArcGIS.Controls.!PageLayoutControl2m_pageLayoutControl=null;privateIMapDocumentpMapDocument;若以上指針無效,請添加以下引用:usingESRI.ArcGIS.Carto;usingESRI.ArcGIS.Controls;usingESRI.ArcGIS.esriSystem;usingESRI.ArcGIS.Display;usingESRI.ArcGIS.Geometry;usingESRI.ArcGIS.SystemUI;在設計視圖中的屬性面板中,選擇Forml,即主窗體,單擊事件按鈕（閃電形狀的那個按鈕），打到“Load”事件并雙擊，添加此事件。在Forml_Load函數中初始化這些指針://取得MapControl和PageLayoutControl的弓|用m_mapControl=(IMapControl3)this.axMapControll.Object;m_pageLayoutControl=(IPageLayoutControl2)this.axPageLayoutControl1.Object;依次雙擊每個菜單項,添加菜單響應函數。實現代碼如下:III<summary>II!新建地圖命令III</summary>III<paramname="sender'X/param>III<paramname="e></param>privatevoidNewClick(objectsender,EventArgse)//本命令涉及到MapControl和PageLayoutControl同步問題,將在下ー講中實現Ill<summary>III打開地圖文檔Mxd命令III</summary>III<paramname=sender*X/param>III<paramname="e></param>privatevoidOpen_Click(objectsender,EventArgse)//本命令涉及到MapControl和PageLayoutControl同步問題,將在下ー講中實現Ill</summary>III<paramname="sender"X/param>III<paramname="e"></param>privatevoidAddData_Click(objectsender,EventArgse)intcurrentLayerCount=this.axMapControll.LayerCount;ICommandpCommand=newControlsAddDataCommandClassO;pCommand.OnCreate(this.axMapControll.Object);pCommand.OnClickO;//Z保存地圖文檔命令III</summary>III<paramname=sender*X/param>III<paramname="e〉く/param>privatevoidSave_Click(objectsender,EventArgse)//首先確認當前地圖文檔是否有效if(null!=m_pageLayoutControl.DocumentFilename&&mmapControl.CheckMxFile(mpageLayoutControl.DocumentFi1ename))(/Z創建一個新的地圖文檔實例IMapDocumentmapDoc=newMapDocumentClass();/Z打開當前地圖文檔mapDoc.Open(mpageLayoutControl.DocumentFilename,string.Empty);/Z用PageLayout中的文檔替換當前文檔中的PageLayout部分mapDoc.ReplaceContents((IMxdContents)mpageLayoutControl.PageLayout);/Z保存地圖文檔mapDoc.Save(mapDoc.UsesRelativePaths,false);mapDoc.Close();III<summary>II!另存為地圖文檔命令III<paramname=〃sender"X/param>Ill<paramname=e></param>privatevoidSaveAs_Click(objectsender,EventArgse)/Z調用另存為命令ICommandcommand=newControlsSaveAsDocCommandClass();command.OnCreate(m_controlsSynchronizer.ActiveControl);command.OnClick();///<summary>III退出程序///<summary>III退出程序III</summary>Ill<paramname二〃sender'X/param>III<paramname="e"></param>privatevoidExit_Click(objectsender,EventArgse)Application.Exit();3、編譯運行按F5編譯運行程序。也許你會發現,菜單命令的實現方式都是類型的。沒錯,在AE9.2中,內置了許多常用的Command和Tool,如ControlsAddDataCommandClassヽControlsMapZoomlnToolClassヽContr〇1sMapPanT〇〇1C1ass等等,這些內置對象在ESRI.ArcGIS.Controls命名空間中,你可以對象瀏覽器中查看。而且這些內置對象的調用方式都類似,如下所示:/Z定義ICommandcommand=newControlsSaveAsDocCommandClass();/Z創建command.OnCreate(m_controlsSynchronizer.ActiveControl);/Z調用command.OnClickO;希望你可以舉一反三,去實現更多的你想要的功能。第三講MapControl與PageLayoutControl同步在ArcMap中,能夠很方面地進行MapView和LayoutView兩種視圖的切換,而且二者之間的數據是同步顯示的。關于兩種視圖同步的實現方法有多種,可以使用ObjectCopy對象進行數據硬拷貝,而比較簡單的方法莫過于二者共享一份地圖了,這也是最常用的方法。1、新建同步類ControlsSynchronizer在解決方案面板中右擊項目名,選擇“添加:類”,在類別中選擇“VisualC#項目項”,在模板中選擇“類”,輸入類名“ControlsSynchronizer.es”,將以下代碼覆蓋自動生成的代碼:usingSystem;usingSystem.Drawing;usingSystem.Collections;usingSystem.ComponentModcl;usingSystem.Windows.Forms;usingSystem.10;usingSystem.Runtime.InteropServices;usingESRLArcGIS.esriSystem;usingESRLArcGIS.Carto;usingESRLArcGIS.Controls;usingESRLArcGIS.SystemUI;namespace_sdnMap{III<summary>IIIThisclassisusedtosynchronizeagvenPageLayoutControlandaMapControl.IllWheninitialized,theusermustpassthereferenceofthesecontroltotheclass,bindIIIthecontroltogetherbycalling'BindControls'whichinturnsetsajoinedMapreferencedIIIbybothcontrol;andsetallthebuddycontrolsjoinedbetweenthesetwocontrols.IllWhenalternatingbetweentheMapControlandPageLayoutControl,youshouldactivatethevisiblecontrolIIIanddeactivatetheotherbycallingActivateXXX.IllThiscalssislimitedtoasituationwherethecontrolsarenotsimultaneouslyvisible.Ill</summary>publicclassControlsSynchronizerttregionclassmembersprivate!MapControl3m_mapControl=null;privateIPageLayoutControl2mpageLayoutControl=null;privateIToolm_mapActiveTool=null;privateIToolm_pageLayoutActiveTool=null;privateboolm_IsMapCtrlactive=true;privateArrayListm_frameworkControls=null;ttendregion#regionconstructorIII<summary>//Z默認構造函數III</summary>publicControlsSynchronizer()(〃初始化ArrayListm_frameworkContro1s=newArrayList();)Ill</summary>III<paramname="mapControl”>く/param>III<paramname="pageLayoutControl"X/param>publicControlsSynchronizer(IMapControl3mapControl,IPageLayoutContro12pageLayoutControl):thisO{〃為類成員賦值mmapControl=mapControl;m_pageLayoutControl=pageLayoutControl;}ttcndregion#regionpropertiesIII<summary>III取得或設置MapControlIIIく/summary)publicIMapControl3MapControl(get{returnm_mapControl;}set{m_mapControl=value;}Ill<summary>III取得或設置PageLayoutControlIII</summary>publicIPageLayoutContro12PageLayoutContro1(get{returnmpageLayoutControl;}set{mpageLayoutControl=value;})III<summary>///取得當前ActiveView的類型III</summary>publicstringActiveViewType(get(if(m_IsMapCtrlactive)return"MapControl”;elseIll<summary>〃/取得當前活動的ControlIII</summary>publicobjectActiveControl(get{if(m_mapContro!ニニnull||m_pageLayoutContro!ニニnull)thrownewException("ControlsSynchronizer::ActiveControl:\r\nEitherMapControlorPageLayoutControlarenotinitialized!");if(mlsMapCtrlactive)returnm_mapControl.Object;elsereturnmpageLayoutControl.Object;})ttendregion#regionMethodsIII<summary>Ill激活MapControl并解除thePagleLayoutControlIIIく/summary)publicvoidActivateMap(){try(if(mpageLayoutControl==nul1||mmapControl==null)thrownewException(^ControlsSynchronizer::ActivateMap:\r\nEitherMapControlorPageLayoutControlarenotinitialized!");〃緩存當前PageLayout的CurrentToolif(mpageLayoutControl.CurrentTool!=null)mjpageLayoutActiveTool=m_pageLayoutControl.CurrentTool;〃解除PagleLayoutm_pageLayoutControl.ActiveView.Deactivate();〃激活MapControlm_mapControl.ActiveView.Activate(m_mapControl.hWnd);〃將之前MapControl最后使用的tool,作為活動的tool,賦給MapControl的CurrentToolif(m_mapActiveTool!=null)m_mapControl.CurrentTool=m_mapActiveTool;m_IsMapCtrlactive=true;〃為每ー個的frameworkcontrols,設置Buddycontrol為MapControlthis.SetBuddies(mmapControl.Object);)catch(Exceptionex)(thrownewException(string.Format(z/ControlsSynchronizer::ActivateMap:\r\n{0}/z,ex.Message));III<summary>III激活PagleLayoutContro!并減活MapCotrolIII</summary>publicvoidActivatePageLayout(){try(if(mpageLayoutControl==nul1||mmapControl==null)thrownewException("ControlsSynchronizer::ActivatePageLayout:\r\nEitherMapControlorPageLayoutControlarenotinitialized!，z);〃緩存當前MapContro!的CurrentToolif(mmapControl.CurrentTool!=null)m_mapActiveToo1=mmapControl.CurrentTool;〃解除MapControlm_mapControl.ActiveView.DeactivateO;〃激活PageLayoutControlm_pageLayoutControl.ActiveView.Activate(m_pageLayoutControl.hWnd);〃將之前PageLayoutControl最后使用的tool,作為活動的tool,賦給PageLayoutContro!的CurrentToolif(m_pageLayoutActiveTool!=null)m_pageLayoutControl.CurrentTool=m_pageLayoutActiveTool;m_lsMapCtrlactive=false;〃為每一1個的frameworkcontrols,設置Buddycontrol為PageLayoutControlthis.SetBuddies(m_pageLayoutControl.Object);)catch(Exceptionex)thrownewException(string.Format(^ControlsSynchronizer::ActivatePageLayout:\r\n{0}",ex.Message));III<summary>III給予ー個地圖,置換PageLayoutControl和MapContro!的focusmapIII</summary>III<paramname="newMap〃X/param>publicvoidReplaceMapdMapnewMap)(if(newMap==nul1)thrownewException("ControlsSynchronizer::ReplaceMap:\r\nNewmapforreplacementisnotinitialized!z/);if(m_pageLayoutControl==null|Im_mapControl==null)thrownewException(^ControlsSynchronizer::ReplaceMap:\r\nEitherMapControlorPageLayoutControlarenotinitialized!zz);//createanewinstanceofIMapscollectionwhichisneededbythePageLayout〃創建一個PageLayout需要用到的,新的IMapscollection的實例IMapsmaps=newMaps();//addthenewmaptotheMapscollection〃把新的地圖加到Mapscollection里頭去maps.Add(newMap);boolblsMapActive=m_IsMapCtrlactive;//callreplacemaponthePageLayoutinordertoreplacethefocusmap//wemustcallActivatePageLayout,sinceitisthecontrolwecall'ReplaceMaps,〃調用PageLayout的replacemap來置換focusmap〃我們必須調用ActivatePageLayout,因為它是那個我們可以調用"RcplaceMaps”的Controlthis.ActivatePageLayout();m_pageLayoutControl.PageLayout.ReplaceMaps(maps);//assignthenewmaptotheMapControl〃把新的地圖賦給MapControlm_mapContr〇!.Map=newMap;//resettheactivetools〃重設activetoolsmpageLayoutActiveTool=null;m_mapActiveTool=null;//makesurethatthelastactivecontrolisactivated〃確認之前活動的control被激活if(blsMapActive){this.ActivateMap();mmapControl.ActiveView.Refresh();}else{this.ActivatePageLayout();mpageLayoutControl.ActiveView.Refresh();)}III<summary>IIIbindtheMapControlandPageLayoutControltogetherbyassigninganew

jointfocusmap///指定共同的Map來把MapControl和PageLayoutControl綁在?起III</summary>III<paramname=mapControl></param>III<paramname=PageLayoutControl〃>く/param>IIIくparamname="activateMapFirst”>trueiftheMapControlsupposedtobeactivatedfirst,如果MapControl被首先激活,則為true</param>publicvoidBindControls(IMapControl3mapControl,IPageLayoutControl2pageLayoutControl,boolactivateMapFirst)(if(mapControl==null|pageLayoutControl==null)thrownewException("ControlsSynchronizer::BindControls:\r\nEitherMapControlorPageLayoutControlarenotinitialized!/z);m_mapControl=MapControl;mpageLayoutControl=pageLayoutControl;this.BindControls(activateMapFirst);)III<summary>IIIbindtheMapControlandPageLayoutControltogetherbyassigninganew

jointfocusmapII/指定共同的Map來把MapControl和PageLayoutContro!綁在ー起III</summary>III<paramname二activateMapFirst">trueiftheMapControlsupposedtobeactivatedfirst,如果MapControl被首先激活,則為true</param>publicvoidBindControls(boolactivateMapFirst)(if(mpageLayoutControl==nul1|,mmapControl==null)thrownewException("ControlsSynchronizer::BindControls:\r\nEitherMapControlorPageLayoutControlarenotinitialized!");//createanewinstanceofIMap〃創造IMap的ー個實例IMapnewMap=newMapClass();newMap.Name=Map”;//createanewinstanceofIMapscollectionwhichisneededbythePageLayout〃創造ー個新的IMapscollection的實例,這是PageLayout所需要的IMapsmaps=newMaps();//addthenewMapinstancetotheMapscollection〃把新的Map實例賦給Mapscollectionmaps.Add(newMap);//callreplacemaponthePageLayoutinordertoreplacethefocusmap〃調用PageLayout的replacemap來置換focusmapm_pageLayoutControl.PageLayout.ReplaceMaps(maps);//assignthenewmaptotheMapControl〃把新的map賦給MapControlmmapContro1.Map=newMap;//resettheactivetools//重設activetoolsm_pageLayoutActiveTool=null;mmapActiveTool=null;//makesurethatthelastactivecontrolisactivated〃確定最后活動的control被激活if(activateMapFirst)this.ActivateMapO;elsethis.ActivatePageLayout();)III<summary>///bypassingtheapplication*stoolbarsandTOCtothesynchronizationclass,itsavesyouthe///managementofthebuddycontroleachtimetheactivecontrolchanges.Thismethodadstheframework///controltoanarray;oncetheactivecontrolchanges,theclassiteratesthroughthearrayand///callesSetBuddyControloneachofthestoredframeworkcontrol.Ill</summary>III<paramname="control〃>く/param>publicvoidAddFrameworkControl(objectcontrol)if(control=null)thrownewException("ControlsSynchronizer::AddFrameworkControl:\r\nAddedcontrolisnotinitialized!，z);m_frameworkControIs.Add(control);)III<summary>IIIRemoveaframeworkcontrolfromthemanagedlistofcontrolsIII</summary>III<paramname="control〃>く/param>publicvoidRemoveFrameworkControl(objectcontrol)(if(control=null)thrownewException(AControlsSynchronizer::RemoveFrameworkControl:\r\nControltoberemovedisnotinitialized!;m_frameworkContro1s.Remove(control);III<summary>IIIRemoveaframeworkcontrolfromthemanagedlistofcontrolsbyspecifyingitsindexinthelistIII</summary>Ill<paramname=index*X/param>publicvoidRemoveFrameworkControlAt(intindex)(if(m_frameworkControls.Count<index)thrownewExceptionControlsSynchronizer::RemoveFrameworkControlAt:\r\nlndexisoutofrange!");m_frameworkContro1s.RemoveAt(index);)III<summary>IIIwhentheactivecontrolchanges,theclassiteratesthroughthearrayoftheframeworkcontrolsIIIandcallesSetBuddyControloneachofthecontrols.Ill</summary>III<paramname="buddy”>theactivecontrol</param>privatevoidSetBuddies(objectbuddy)(try(if(buddy==null)thrownewException("ControlsSynchronizer::SetBuddies:\r\nTargetBuddyControlisnotinitialized!");foreach(objectobjinm_frameworkControls)if(objisIToolbarControl){((IToolbarControl)obj).SetBuddyControl(buddy);)elseif(objisITOCControl)(((ITOCControl)obj).SetBuddyControl(buddy);}))catch(Exceptionex)thrownewException(string.Format("ControlsSynchronizer::SetBuddies:\r\n{0}",ex.Message));))ttendregion2、新建Maps類在同步類中,要用到Maps類,用于管理地圖對象。與新建同步類ControlsSynchronizer類似,我們新建一Maps類,其所有代碼如下所示:usingSystem;usingSystem.Collections;usingSystem.Collections.Generic;usingSystem.Text;usingSystem.Runtime.InteropServices;usingESRI.ArcGIS.Carto;namespace_sdnMap([GuidCf27d8789-fbbc-4801-be78-0e3cd8fff9d5")][ClassInterface(ClassInterfaceType.None)][Progid(*_sdnMap.Maps")]publicclassMaps:IMaps,Disposable(//classmember-usinginternallyanArrayListtomanagetheMapscollectionprivateArrayListm_array=null;ttregionclassconstructorpublicMaps()(m_array=newArrayList();)#endregion#regionIDisposableMembersIII<summary>IIIDisposethecollectionIII</summary>publicvoidDispose()if(m_array!=null)(m_array.Clear();m_array=null;#endregionttregionIMapsMembersIII<summary>IIIRemovetheMapatthegivenindexIII</summary>III<paramname二〃Index”)く/param>publicvoidRemoveAt(intIndex){if(Index>marray.Count||Index<0)outofrange!");thrownewException("Maps::RemoveAt:\r\nlndexism_array.RemoveAt(Index);outofrange!");}III<summary>IIIResettheMapsarrayIII</summary>publicvoidReset()Ill<summary>IIIGetthenumberofMapsinthecollectionIII</summary>publicintCount(get{returnm_array.Count;III<summary>IIIReturntheMapatthegivenindexIII</summary>III<paramname="Index'X/param〉III<returns></returns>publicIMapget_Item(intIndex)(if(Index>m_array.Count||Index<0)thrownewException("Maps::get_Item:\r\nlndexisoutofrange!");returnm_array[Index]asIMap;Ill<summary>IIIRemovetheinstanceofthegivenMapIII</summary>III<paramname二〃Map"X/param>publicvoidRemove(IMapMap)(m_array.Remove(Map);}III<summary>IIICreateanewMap,addittothecollectionandreturnittothecallerIII</summary>III<returns></returns>publicIMapCreate()(IMapnewMap=newMapClass();m_array.Add(newMap);returnnewMap;Ill<summary>IIIAddthegivenMaptothecollectionIII</summary>III<paramname="Map"X/param>publicvoidAdd(IMapMap)(if(Map==null)thrownewException("Maps::Add:\r\nNewMapismotinitialized!");m_array.Add(Map);ttendregion3、新建打開文檔類OpenNewMapDocument由于從工具欄自帶的打開按鈕打開地圖文檔的時候,不會自動進行兩種視圖之間的同步,所以我們要自己派生一?個OpenNewMapDocument類,用于打開地圖文檔。右擊項目名,選擇“添加I1類”,再選擇ArcGIS類別中的BaseCommand模板,輸入類名為“OpenNewMapDocument.cs”。首先添加引用:usingSystem.Windows.Forms;usingESRLArcGIS.Carto;再添加如下成員變量:privateControlsSynchronizermcontrolsSynchronizer=nul1;修改默認的構造函數如下所示:〃添加參數publicOpenNewMapDocument(ControlsSynchronizercontrolsSynchronizer)(////TODO:Definevaluesforthepublicproperties//〃設定相關屬性值base.m_category=’Generic;//localizabletextbase.m_caption="Open";//localizabletextbase.m_message="ThisshouldworkinArcMap/MapControl/PageLayoutControl";//localizabletextbase.m_toolTip="Open";//localizabletextbase.m_name=Generic_Open";//uniqueid,non-localizable(e.g.〃MyCategory_MyCommand")//初始化m_controlsSynchronizerm_contro1sSynchronizer=controlsSynchronizer;try(////TODO:changebitmapnameifnecessary//stringbitmapResourceName=GetType().Name+”.bmp〃;base.m_bitmap=newBitmap(GetType(),bitmapResourceName);)catch(Exceptionex)(System.Diagnostics.Trace.WriteLine(ex.Message,"InvalidBitmap");})再在OnClick函數中添加如下代碼:publicoverridevoidOnClick()//TODO:AddOpenNewMapDocument.OnClickimplementationOpenFileDialogdig=newOpenFileDialogO;dig.Filter=MapDocuments(*.mxd)I*.mxd”;dig.Multiselect=false;dig.Title=OpenMapDocument";if(dig.ShowDialogO==DialogResult.OK)(stringdocName=dig.FileName;IMapDocumentmapDoc=newMapDocumentClassO;if(mapDoc.get_IsPresent(docName)&&,!mapDoc.getlsPasswordProtected(docName))(mapDoc.Open(docName,string.Empty);IMapmap=mapDoc.get_Map(0);mcontrolsSynchronizer.ReplaceMap(map);mapDoc.Close();在添加類時,模板會自動添加一?個名為"OpenNewMapDocument.bmp”的圖標,你可以自己修改或者替換為打開的文件夾的圖標。4、兩種視圖的同步在3sdnMap.cs中添加成員變量,即同步類對象:privateControlsSynchronizermcontrolsSynchronizer=null;在Forml_Load函數中進行初始化工作:〃初始化controlssynchronizationcalssmcontrolsSynchronizer=newContro1sSynchronizer(m_mapControl