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"null0);
                    
//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!

 

 

posted on 2010-10-26 17:44  风之恋  阅读(6789)  评论(14编辑  收藏  举报

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