C#将CAD数据转成shape或mdb的代码

本文所指的CAD数据为不带空间参考和扩展数据的数据。如果CAD带了空间参考或是扩展属性数据的话，就要采用图形和属性分离的方法转CAD数据，即图形转完后需要挂接属性数据库。这里就不详细说明了.

ArcGIS和CAD对空间数据的归纳有所不同，在AutoCad中，点线面可以在同一个图层中，但是在ArcGIS中，点线面被严格的区分为了point、polyline和polygon三种类型的图层，所以直接用ArcCatalog查看CAD数据时会看到五个图层（点线面、注记和Multipatch）

下面的方法实现了点线面图层转成Shape文件

 Code [http://www.xueit.com]
 public bool CadDataToShape(string _cadFilePath)
 {        
            //工作空间         
            IWorkspaceFactory pWorkspaceFactory;
            IFeatureWorkspace pFeatureWorkspace;
            IFeatureLayer pFeatureLayer;
            IFeatureDataset pFeatureDataset;//图层对应数据集
            
            ESRI.ArcGIS.ConversionTools.FeatureClassToFeatureClass feaTofea = new FeatureClassToFeatureClass();
            ESRI.ArcGIS.Geoprocessor.Geoprocessor pGeoPro = new ESRI.ArcGIS.Geoprocessor.Geoprocessor();

            try
            {
                string strFullPath = _cadFilePath;
                int index = strFullPath.LastIndexOf("\\");
                string filePath = strFullPath.Substring(0, index);
                string fileName = strFullPath.Substring(index   1);
                string DataSaveFilePath=@"D:\CADToShape\";

                cadGISInfo = new stMdbInfo();
                cadGISInfo.mdbFeaturesName = new List<string>();
                cadGISInfo.mdbname = fileName;

                //打开cad数据集
                pWorkspaceFactory = new CadWorkspaceFactoryClass();
                pFeatureWorkspace = (IFeatureWorkspace)pWorkspaceFactory.OpenFromFile(filePath, 0);
                
                
                if (Directory.Exists(DataSaveFilePath   @"\\"   fileName))
                {                  
                    DirectoryInfo dirInfo = new DirectoryInfo(DataSaveFilePath   @"\\"   fileName);
                    foreach (FileInfo file in dirInfo.GetFiles())
                    {
                        file.Delete();
                    }
                   
                    Directory.Delete(DataSaveFilePath   @"\\"   fileName);
                }

                Directory.CreateDirectory(DataSaveFilePath   @"\\"   fileName);

                cadGISInfo.mdbfilepath = DataSaveFilePath   @"\\"   fileName;

                //打开一个要素集
                pFeatureDataset = pFeatureWorkspace.OpenFeatureDataset(fileName);

                IFeatureClassContainer pFeatureClassContainer = (IFeatureClassContainer)pFeatureDataset;
                //对CAD文件中的要素进行遍历处理
                int count = pFeatureClassContainer.ClassCount;

                for (int j = 0; j < pFeatureClassContainer.ClassCount; j  )
                {
                    IFeatureClass pFeatClass = pFeatureClassContainer.get_Class(j);
                    cadGISInfo.mdbFeaturesName.Add(pFeatClass.AliasName ".shp");
                    if (pFeatClass.FeatureType == esriFeatureType.esriFTCoverageAnnotation || pFeatClass.FeatureType == esriFeatureType.esriFTAnnotation)
                    {

                    }
                    else
                    {
                        feaTofea.in_features = strFullPath   @"\\"   pFeatClass.AliasName;
                        feaTofea.out_path = DataSaveFilePath   @"\\"   fileName;

                        feaTofea.out_feature_class = pFeatClass.AliasName;
                        feaTofea.out_name = pFeatClass.AliasName;
                        pGeoPro.Execute(feaTofea, null);
                    }
                }           
                return true;
            }
            catch
            {
                return false;
            }
            finally
            {
                pWorkspaceFactory = null;              
                pFeatureDataset = null;            
                pFeatureWorkspace = null;             
                GC.Collect();
            }

        }
下面的方法实现CAD数据转成本地的Personal Geodatbase，同时实现了注记图层的转换
public bool CadDataToGeodatabase(string _cadFilePath)
        {     
            //工作空间         
            IWorkspaceFactory pWorkspaceFactory;
            IFeatureWorkspace pFeatureWorkspace;
            IFeatureLayer pFeatureLayer;
            IFeatureDataset pFeatureDataset;//图层对应数据集

            //创建MDB工作空间
            IWorkspaceFactory pAccessWorkSpaceFactory;

            //这个conversionTools不包含注记图层的转换
            ESRI.ArcGIS.ConversionTools.FeatureClassToFeatureClass feaTofea = new FeatureClassToFeatureClass();
            ESRI.ArcGIS.Geoprocessor.Geoprocessor pGeoPro = new ESRI.ArcGIS.Geoprocessor.Geoprocessor();
            //ImportCADAnnotation功能，实现导入注记图层
            ESRI.ArcGIS.ConversionTools.ImportCADAnnotation importCADAnno = new ImportCADAnnotation();
            try
            {                
                    string strFullPath = _cadFilePath;
                    int index = strFullPath.LastIndexOf("\\");
                    string filePath = strFullPath.Substring(0, index);
                    string fileName = strFullPath.Substring(index   1);
                    string DataSaveFilePath=@"D:\CADToMDB\";

                    cadGISInfo= new stMdbInfo();
                    cadGISInfo.mdbFeaturesName = new List<string>();
                    cadGISInfo.mdbname = fileName;
                    //打开cad数据集
                    pWorkspaceFactory = new CadWorkspaceFactoryClass();
                    pFeatureWorkspace = (IFeatureWorkspace)pWorkspaceFactory.OpenFromFile(filePath, 0);

                    //创建mdb(personal geodatabase)
                    pAccessWorkSpaceFactory = new AccessWorkspaceFactoryClass();
                    if (File.Exists(DataSaveFilePath   @"\\"   fileName   ".mdb"))
                    {
                        File.Delete(DataSaveFilePath   @"\\"   fileName   ".mdb");
                    }

                    cadGISInfo.mdbfilepath = DataSaveFilePath   @"\\"   fileName   ".mdb";
                    //ltMdbFilePath.Add(DataSaveFilePath   @"\\"   fileName   ".mdb");

                    pAccessWorkSpaceFactory.Create(DataSaveFilePath, fileName   ".mdb", null, 0);
                    //打开一个要素集
                    pFeatureDataset = pFeatureWorkspace.OpenFeatureDataset(fileName);

                    IFeatureClassContainer pFeatureClassContainer = (IFeatureClassContainer)pFeatureDataset;
                    //对CAD文件中的要素进行遍历处理
                    int count = pFeatureClassContainer.ClassCount;

                    for (int j = 0; j < pFeatureClassContainer.ClassCount; j  )
                    {

                        IFeatureClass pFeatClass = pFeatureClassContainer.get_Class(j);
                        cadGISInfo.mdbFeaturesName.Add(pFeatClass.AliasName);
                        if (pFeatClass.FeatureType == esriFeatureType.esriFTCoverageAnnotation || pFeatClass.FeatureType == esriFeatureType.esriFTAnnotation)
                        {
                            pFeatureLayer = new CadAnnotationLayerClass();//注记图层
                            importCADAnno.input_features = strFullPath   @"\\"   pFeatClass.AliasName;
                            importCADAnno.output_featureclass = DataSaveFilePath   @"\\"   fileName   ".mdb"   @"\\"   pFeatClass.AliasName;
                            importCADAnno.reference_scale = 1000;
                            pGeoPro.Execute(importCADAnno, null);
                        }
                        else
                        {
                            feaTofea.in_features = strFullPath   @"\\"   pFeatClass.AliasName;
                            feaTofea.out_path = DataSaveFilePath   @"\\"   fileName   ".mdb";

                            feaTofea.out_feature_class = pFeatClass.AliasName;
                            feaTofea.out_name = pFeatClass.AliasName;
                            pGeoPro.Execute(feaTofea, null);
                        }
                    }                 
                return true;
            }
            catch(Exception ex)
            {
                return false;
            }
            finally
            {                 
                GC.Collect();           
            }            
        }
从上面的代码可以看出，实际C#调用了Geoprocessor 执行了ConversionTools.FeatureClass to FeatureClass工具，这是不是有点像用arctoolbox中的功能！这里就可以扩展用Geoprocessor 实现其他arctoolbox中能够先实现的功能！

这里也可以将上面的方法里的参数改为多个cad数据路径,实现批量转数据！