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  • 打开cad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);

            /// <summary>
            /// 获取记录集
            /// </summary>
            /// <param name="directoryPath"></param>
            /// <param name="fileName"></param>
            /// <returns></returns>
            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 pDatasetName = new CadDrawingNameClass();
                pDatasetName.Name = fileName;
                pDatasetName.WorkspaceName = pWorkspaceName;

                //Open the CAD drawing
                IName pName = (IName)pDatasetName;
                return (ICadDrawingDataset)pName.Open();
            }

    需要注意

    如果你的ArcGIS版本是V9.2的话,可能是因为你的文件名中含有中文字符的原因.据我所知,在ArcGIS9.2中无法显示文件名含有中文字符的CAD文件.你可以在ArcMap中直接打开试试,如果也无法显示的话,可能是文件名的问题(注:路径中也不能含有中文字符).

    转载自:http://www.gisforum.net/bbs/dispbbs.asp?boardid=35&id=145238
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  • 原文地址:https://www.cnblogs.com/atravellers/p/1646610.html
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