今天在进行打开工作空间操作的时候突然报错“异常来自 HRESULT:0x80040351”。
分析后发现是IWorkspaceFactory实现类的对应关系不对。本来想操作数据库中的.gdb文件,但是声明的时候却写成了IWorkspaceFactory workspaceFactory = new ShapefileWorkspaceFactory();后来改成IWorkspaceFactory workspaceFactory = new FileGDBWorkspaceFactoryClass();问题就迎刃而解了。惭愧...
转一份“Arcengine中打开各种数据源(WorkSpace)的连接”,数据源类型包括SDE、personal/File、ShapeFile、CAD数据、影像图、影像数据集。
1.企业数据库(SDE) 企业数据库需要使用SDE来管理,所以需要使用SDE的Workspace来表示连接。在AE接口中,Workspace是由Factory打开的。代码如下: //准备连接参数 ESRI.ArcGIS.esriSystem.IPropertySet pPropSet=new PropertySetClass(); pPropSet.SetProperty("server","服务器机器名" ); pPropSet.SetProperty("instance","SDE运行的端口号"); pPropSet.SetProperty("user","用户名"); pPropSet.SetProperty("password","口令" ); pPropSet.SetProperty("version","版本"); SdeWorkspaceFactory sdeWkspFact=new SdeWorkspaceFactoryClass(); IFeatureWorkspace pFeaWksp=(IFeatureWorkspace)sdeWkspFact.Open(pPropSet,0); 其中唯一需要解释的可能就是版本(version).对于没有使用版本或者第一次连接(没有建立空间数据库,当然没有版本了). 该处使用sde.DEFAULT这个版本。这是默认的版本。 iPropertySet:: setProperty public void setProperty(string name,object value) 2.个人数据库(PersonalGeodatabase、FileGeodatabase) ArcEngine中个人数据库为Access。 string filePath="E:\\tt.mdb"; AccessWorkspaceFactory fac=new AccessWorkspaceFactoryClass(); IFeatureWorkspace space=(IFeatureWorkspace)fac.OpenFromFile(filePath,0); 这是用的最多的一种方式. 如果是FileGeodatabasse,则将 FileGDBWorkspaceFactory pWSF = New FileGDBWorkspaceFactory; IFeatureWorkspace pWS1= pWSF.OpenFromFile(sPath, 0); 如果用IPropertySet。如下: //Personal Geodatabase e.g., database = "C:\\myData\\mypGDB.mdb" public IWorkspace open_pGDB_Workspace(string database) { IPropertySet propertySet = new PropertySetClass(); propertySet.SetProperty("DATABASE", database); IWorkspaceFactory workspaceFactory = new AccessWorkspaceFactoryClass(); return workspaceFactory.Open(propertySet, 0); } 3.Shapefile文件 Shapefile和Access的打开方式有一点相同。也有差异。 //这是Shape所在的目录(注意:是目录) string spacePath="E:\\shapefile"; IShapefileWorkspaceFactory fac=new ShapefileWorkspaceFactoryClass(); IFeatureWorkspace space=(IFeatureWorkspace)fac.OpenFromFile(spacePath,0); IFeatureClass fc=space.openFeatureClass(“china”); 4.AutoCAD dwg文件 AutoCAD文件和一般的ESRI格式不同。所以代码会有一点点奇怪。假设有一个dwg文件为E:\\cad\\107.dwg 下面是打开的代码: CadWorkspaceFactoryClass fac=new CadWorkspaceFactoryClass (); String filePath="E:\\cad"; IFeatureWorkspace space=fac.OpenFromFile(filePath,0) as IFeatureWorkspace ; 下面是打开FeatureClass的代码: //线 IFeatureClass polyline =space.OpenFeatureClass("107.dwg:Polyline"); IFeatureLayer layer=new CadFeatureLayerClass (); layer.FeatureClass =polyline; //点 IFeatureClass point=space.OpenFeatureClass ("107.dwg:Point"); layer=new CadFeatureLayerClass (); layer.FeatureClass =point; //面 IFeatureClass polygon=space.OpenFeatureClass ("107.dwg:Polygon"); layer=new CadFeatureLayerClass(); layer.FeatureClass =polygon; //注记 IFeatureClass anno=space.OpenFeatureClass ("107.dwg:Annotation"); layer=new CadAnnotationLayerClass(); layer.FeatureClass =anno; 5.影像图文件 //文件路径 string filePath="E:\\image\\117.tif"; IRasterLayer rasterLayer=new RasterLayerClass(); rasterLayer.CreateFromFilePath(filePath ); 6.数据库中的影像数据集。 //数据库连接 IWorkspace space=OpenSpace(); //打开数据库的方式 IRasterWorkspaceEx rasterSpace=(IRasterWorkspaceEx)space; IRasterDataset rasterDataset=rasterSpace.OpenRasterDataset (setName.Name ); IRasterLayer rasLayer=new RasterLayerClass(); rasLayer.CreateFromDataset(rasterDataset); IRasterWorkspaceEx:提供创建和打开栅格目录或栅格数据集的方法。 但是IRasterWorkspaceEx,IRasterWorkspace, IRasterWorkspace2都有OpenRasterDataset。IRasterWorkspace经常也可用于打开栅格数据,如:pWorkspaceFactory = new RasterWorkspaceFactoryClass(); pRasterWorkspace = (IRasterWorkspace)pWorkspaceFactory.OpenFromFile(filePath, 0); IRasterDataset pRasterDataset = (IRasterDataset)pRasterWorkspace.OpenRasterDataset(fileName); IRasterLayer pRasterLayer = new RasterLayerClass(); pRasterLayer.CreateFromDataset(pRasterDataset);
时间: 2024-10-10 11:00:16