C#实现CAD数据转shape或mdb

C#实现CAD数据转shape或mdb

 

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）

 

话不多说了，进入主题吧

下面的方法实现了点线面图层转成Shape文件

 

代码

  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

 

代码

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！

来自：http://www.cnblogs.com/MyLucifer/archive/2010/10/26/1861747.html