ArcEngine打开AutoCAD文件的几种方法.doc

ArcEngine 打开AutoCAD文件的几种方法方法一、 IWorkspaceFactory pWorkspaceFactory; IFeatureWorkspace pFeatureWorkspace; IFeatureLayer pFeatureLayer; IFeatureDataset pFeatureDataset; /打开CAD数据集 pWorkspaceFactory = new CadWorkspaceFactoryClass(); pFeatureWorkspace = (IFeatureWorkspace)pWorkspaceFactory.OpenFromFile(directoryPath, 0); /打开一个要素集 pFeatureDataset = pFeatureWorkspace.OpenFeatureDataset(fileName); /IFeaturClassContainer可以管理IFeatureDataset中的每个要素类 IFeatureClassContainer pFeatureClassContainer = (IFeatureClassContainer)pFeatureDataset; /对CAD文件中的要素进行遍历处理 for (int i = 0; i pFeatureClassContainer.ClassCount - 1; i+) IFeatureClass pFeatureClass = pFeatureClassContainer.get_Class(i); if (pFeatureClass.FeatureType = esriFeatureType.esriFTAnnotation) /如果是注记，则添加注记层 pFeatureLayer = new CadAnnotationLayerClass(); else/如果是点、线、面，则添加要素层 pFeatureLayer = new FeatureLayerClass(); pFeatureLayer.Name = pFeatureClass.AliasName; pFeatureLayer.FeatureClass = pFeatureClass; this.axmc_Main.Map.AddLayer(pFeatureLayer); this.axmc_Main.ActiveView.*(); 方法二、 /-定义工作空间，并用CadWorkspaceFactoryClass()实例化它 IWorkspaceFactory pWorkspaceFactory = new CadWorkspaceFactoryClass(); /-打开相应的工作空间，并赋值给要素空间，OpenFromFile（） /-中的参数为CAD文件夹的路径 IFeatureWorkspace pFeatureWorkspace = pWorkspaceFactory.OpenFromFile(directoryPath, 0) as IFeatureWorkspace; /*-打开线要素类，如果要打开点类型的要素，需要把下边的代码该成： *- IFeatureClass pFeatureClass = pFeatureWorkspace.OpenFeatureClass (fileName + :point); *- 由此可见fileName为CAD图的名字，后边加上要打开的要素类的类型，中间用冒号 *- 隔开，大家可以想想多边形和标注是怎么打开的。 */ /point polyline IFeatureClass pFeatureClass = pFeatureWorkspace.OpenFeatureClass(fileName + :point); IFeatureLayer pFeatureLayer = new FeatureLayerClass(); pFeatureLayer.FeatureClass = pFeatureClass; this.axmc_Main.Map.AddLayer(pFeatureLayer); this.axmc_Main.ActiveView.*(); 方法三、 /*-下边的两行代码是定义一个CAD工作空间，然后打开它，但这次不是赋值给 -IFeatureWorkspace对象,而是赋值给IWorkspace定义的对象*/ IWorkspaceFactory pWorkspaceFactory = new CadWorkspaceFactoryClass(); IWorkspace pWorkspace = pWorkspaceFactory.OpenFromFile(directoryPath, 0); /-定义一个CAD画图空间，并把上边打开的工作空间赋给它 ICadDrawingWorkspace pCadDrawingWorkspace = pWorkspace as ICadDrawingWorkspace; /-定义一个CAD的画图数据集，并且打开上边指定的工作空间中一幅CAD图 /-然后赋值给CAD数据集 ICadDrawingDataset pCadDrawingDataset = pCadDrawingWorkspace.OpenCadDrawingDataset(fileName); /-通过ICadLayer类，把上边得到的CAD数据局赋值给ICadLayer类对象的 /-CadDrawingDataset属性 ICadLayer pCadLayer = new CadLayerClass(); pCadLayer.CadDrawingDataset = pCadDrawingDataset; /-利用MapControl加载CAD层 this.axmc_Main.Map.AddLayer(pCadLayer); this.axmc_Main.ActiveView.*();方法四、 IWorkspaceFactory pWorkspaceFactory = new CadWorkspaceFactoryClass(); IFeatureWorkspace pFeatureWorkspace = pWorkspaceFactory.OpenFromFile(directoryPath, 0) as IFeatureWorkspace; IFeatureDataset pFeatureDataset = pFeatureWorkspace.OpenFeatureDataset(fileName); IFeatureClassContainer pFeatureClassContainer = (IFeatureClassContainer)pFeatureDataset; for (int i = 0; i pFeatureClassContainer.ClassCount - 1; i+) IFeatureClass pFeatureClass = pFeatureClassContainer.get_Class(i); IFeatureLayer pFeatureLayer = new FeatureLayerClass(); pFeatureLayer.FeatureClass = pFeatureClass; /ICadLayer pCadLayer = new CadLayerClass(); /pCadLayer = pFeatureLayer as ICadLayer; this.axmc_Main.Map.AddLayer(pFeatureLayer); this.axmc_Main.ActiveView.*(); 方法五、 /Add passed file to MapControl ICadDrawingDataset pCadDrawingDataset = GetCadDrawingDataset(directoryPath, fileName); if (pCadDrawingDataset = null) return; ICadLayer pCadLayer = new CadLayerClass(); pCadLayer.CadDrawingDataset = pCadDrawingDataset; pCadLayer.Name = fileName; this.axmc_Main.AddLayer(pCadLayer, 0); / / 获取记录集 / / / / private ICadDrawingDataset GetCadDrawingDataset(string directoryPath, string fileName) /Create a WorkspaceName object IWorkspaceName pWorkspaceName = new WorkspaceNameClass(); pWorkspaceName.WorkspaceFactoryProgID = esriDataSourcesFile.CadWorkspaceFactory; pWorkspaceName.PathName = directoryPath; /Create a CadDrawingName object IDatasetName pDataset