public void IWorkspaceFactory_Create_Example_Access() {
//create a new Access workspace factory IWorkspaceFactory workspaceFactory=new
ESRI.ArcGIS.DataSourcesGDB.AccessWorkspaceFactoryClass(); //Create a workspacename with the workspace factory IWorkspaceName
workspaceName=workspaceFactory.Create(\ //Cast for IName
ESRI.ArcGIS.esriSystem.IName name=(ESRI.ArcGIS.esriSystem.IName)workspaceName; //Open a reference to the access workspace through the name object IWorkspace pGDB_workspace=(IWorkspace)name.Open();
Console.WriteLine(\{1}\}
public void IWorkspaceFactory_Create_Example_FileGDB() {
//create a new FileGDB workspace factory IWorkspaceFactory workspaceFactory=new
ESRI.ArcGIS.DataSourcesGDB.FileGDBWorkspaceFactoryClass(); //Create a workspacename with the workspace factory IWorkspaceName
workspaceName=workspaceFactory.Create(\ //Cast for IName
ESRI.ArcGIS.esriSystem.IName name=(ESRI.ArcGIS.esriSystem.IName)workspaceName; //Open a reference to the FileGDB workspace through the name object IWorkspace fileGDB_workspace=(IWorkspace)name.Open();
Console.WriteLine(\
{1}\}
public void IWorkspaceFactory_Create_Example_ArcSDE() {
ESRI.ArcGIS.esriSystem.IPropertySet propertySet=new ESRI.ArcGIS.esriSystem.PropertySetClass(); propertySet.SetProperty(\ propertySet.SetProperty(\ propertySet.SetPropert(\ propertySet.SetProperty(\
propertySet.SetProperty(\
//Create a workspacename with the workspace factory IWorkspaceFactory workspaceFactory=new
ESRI.ArcGIS.DataSourcesGDB.SdeWorkspaceFactoryClass(); //Create a workspacename with the workspace factory IWorkspaceName
workspaceName=workspaceFactory.Create(\t,0);
//Cast for IName
ESRI.ArcGIS.esriSystem.IName name=(ESRI.ArcGIS.esriSystem.IName)workspaceName; //Open a reference to the sde workspace through the name object IWorkspace sde_workspace=(IWorkspace)name.Open(); //the path returned in this case weill be for the sde connection
Console.WriteLine(\}
24.3、IWorkspaceFactory.GetWorkspaceName方法
[C#]
public IWorkspaceName GetWorkspaceName(string parentDirectory,IFileNames filenames); Example [C#]
public void IWorkspaceFactory_GetWorkspaceName_Example() {
ESRI.ArcGIS.esriSystem.IFileNames fileNames=new ESRI.ArcGIS.esriSystem.FileNamesClass(); fileNames.Add(\
fileNames.Add(\
fileNames.Add(\
IWorkspaceFactory workspaceFactory=new
ESRI.ArcGIS.DataSourcesGDB.AccessWorkspaceFactoryClass(); IWorkspaceName
workspaceName=workspaceFactory.GetWorkspaceName(\
Console.WriteLine(workspaceName.PathName);
fileNames.Reset();
string fn=fileNames.Next(); while(fn!=null) {
Console.WriteLine(fn); fn=fileNames.Next(); }
ESRI.ArcGIS.esriSystem.IName name=(ESRI.ArcGIS.esriSystem.IName)workspaceName; IWorkspace workspace=(IWorkspace)name.Open(); }
24.4、IWorkspaceFactory.Open方法
[C#]
public IWorkspace Open(IPropertySet ConnectionProperties,int hWnd); Example [C#]
Public IWorkspace IWorkspaceFactory_Open_Example(String server,String instance,String user,String password,String database,String version) {
ESRI.ArcGIS.esriSystem.IPropertySet propertySet=new ESRI.ArcGIS.esriSystem.PropertySetClass(); propertySet.SetProperty(“SERVER”,server);
propertySet.SetProperty(“INSTANCE”,instance); propertySet.SetProperty(“DATABASE”,database); propertySet.SetProperty(“USER”,user);
propertySet.SetProperty(“PASSWORD”,password); propertySet.SetProperty(“VERSION”,version);
IWorkspaceFactory worspaceFactory=new ESRI.ArcGIS.DataSourcesGDB.SdeWorkspaceFactoryClass(); Return workspaceFactory.Open（propertySet,0）; }
24.5、IWorkspaceFactory.OpenFromFile方法
[C#]
public IWorkspace OpenFromFile(string fileName,int hWnd);
OpenFromFile采用表示FileSystemWorkspace或LocalDatabaseWorkspace，或是
RemoteDatabaseWorkspace的connection文件的参数，并返回一个指定workspace的接口。这些方法的客户然后就可以打开和访问workspace中的数据集。调用这些方法时，如果属性不足，将提供一个连接对话框提示需要其他属性。
hWnd引数是父窗体或应用程序窗体，确保connection对话框有正确的父窗体。 Example [C#]
//e.g.,nameOfFile=\
public IWorkspace IWorkspaceFactory_OpenFromFile_Example_Access(string nameOfFile) {
IWorkspaceFactory workspaceFactory=new
ESRI.ArcGIS.DataSourcesGDB.AccessWorkspaceFactoryClass(); return workspaceFactory.OpenFromFile(nameOfFile,0); }
//e.g.,nameOfFile=\
public IWorspace IWorkspaceFactory_OpenFromFile_Example_FileGDB(string nameOfFile) {
IWorkspaceFactory workspaceFactory=new
ESRI.ArcGIS.DataSourcesGDB.FileGDBWorkspaceFactoryClass(); return workspaceFactory.OpenFromFile(nameOfFile,0); }
//e.g.,nameOfFile=\
public IWorkspace IWorkspaceFactory_OpenFromFile_Example_ArcSDE(string nameOfFile) {
IWorkspaceFactory workspaceFactory=new
ESRI.ArcGIS.DataSourcesGDB.SdeWorkspaceFactoryClass(); return workspaceFactory.OpenFromFile(nameOfFile,0); }
//The connection string for a shapefile should be the full path //to the shapfile's folder(e.g.,\
//Note:location cannot be relative path \
public IWorkspace IWorkspaceFactory_OpenFromFile_Example_Shapefile(string nameOfFile) {
IWorkspaceFactory workspaceFactory=new
ESRI.ArcGIS.DataSourcesFile.ShapefileWorkspaceFactoryClass(); return workspaceFactory.OpenFromFile(nameOfFile,0); }
WorkspaceFactory负责管理workspace，允许用户通过一系列connection properties连接workspace。一个workspace表示包含一个或多个数据集的数据库。Dataset包括tables，feature classes和relationship classes。一个workspaceFactory是可以单独创建的。一个WorkspaceFactory包括应用程序引用的当前连接的活动的workspaces。使用PropertySet指定Connection属性，并且可以存到connection文件中。WorkspaceFactory也支持浏览和管理file system Workspaces，以及管理remot database workspaces。
25. ITopologicalOperator接口（esriGeometry）
可以将一个Polygon类型的数据或者Polyline的数据赋值给该接口的变量，如： Set pUnionedPolylines =NewPolyline Set pTopOp = pUnionedPolylines
ITopologicalOperator接口的第一个方法ConstructUnion(geometries ) （方法，合并图形的工具，输入的参数是一个IEnumGeometry类型的参数，此方法效率甚高）
ITopologicalOperator接口的第二个方法Cut(cutter, leftGeom, rightGeom) （方法，剪切图形，第一个参数为剪切的线要素，为IPloyline类型，第二个第三个参数均为剪切后的图形，为输出参数）
ITopologicalOperator接口的第三个方法Boundary（方法，获取一个图形的边框，一个Polygon的boundary是一个Polyline类型的要素，一个Polyline的boundary是一个nultipoint类型的要素，一个Point的boundary是为空的）
ITopologicalOperator接口的第四个方法Buffer(distance) （方法，创造一个Polygon的要素来显示缓冲区域，参数为缓冲距离）