学步园

一、shp文件的加载：
IWorkspaceFactory pWorkspaceFactory;
IFeatureWorkspace pFeatureWorkspace;
IFeatureLayer pFeatureLayer;
//获取当前路径和文件名
OpenFileDialog dlg=new OpenFileDialog();
dlg.ShowDialog();
string strFullPath=dlg.FileName;
if(strFullPath=="") return;
int Index=strFullPath.LastIndexOf("//");
string filePath=strFullPath.Substring(0,Index);
string fileName=strFullPath.Substring(Index+1);
//打开工作空间并添加shp文件
pWorkspaceFactory=new ShapefileWorkspaceFactoryClass();
//注意此处的路径是不能带文件名的
pFeatureWorkspace=(IFeatureWorkspace)pWorkspaceFactory.OpenFromFile(filePath,0);
pFeatureLayer=new FeatureLayerClass();
//注意这里的文件名是不能带路径的
pFeatureLayer.FeatureClass=pFeatureWorkspace.OpenFeatureClass(fileName);
pFeatureLayer.Name = pFeatureLayer.FeatureClass.AliasName;
axMapControl1.Map.AddLayer(pFeatureLayer);
axMapControl1.ActiveView.Refresh();

二、个人数据库(personGeodatabase)的加载：
IWorkspaceFactory pWorkspaceFactory;
IFeatureWorkspace pFeatureWorkspace;
IFeatureLayer pFeatureLayer;
IFeatureDataset pFeatureDataset;
//获取当前路径和文件名
OpenFileDialog dlg=new OpenFileDialog();
dlg.ShowDialog();
string strFullPath=dlg.FileName;
if(strFullPath=="") return;
//打开personGeodatabase,并添加图层
IWorkspaceFactory pAccessWorkspaceFactory=new AccessWorkspaceFactoryClass();
//打开工作空间并遍历数据集
IWorkspace pWorkspace=pAccessWorkspaceFactory.OpenFromFile(strFullPath,0);
IEnumDataset pEnumDataset=pWorkspace.get_Datasets(ESRI.ArcGIS.Geodatabase.esriDatasetType.esriDTAny);
pEnumDataset.Reset();
IDataset pDataset=pEnumDataset.Next();
//如果数据集是IFeatureDataset,则遍历它下面的子类
if(pDataset is IFeatureDataset)
   {
      pFeatureWorkspace=(IFeatureWorkspace)pAccessWorkspaceFactory.OpenFromFile(strFullPath,0);
      pFeatureDataset=pFeatureWorkspace.OpenFeatureDataset(pDataset.Name);
      IEnumDataset pEnumDataset1=pFeatureDataset.Subsets;
      pEnumDataset1.Reset();
      IDataset pDataset1=pEnumDataset1.Next();
      //如果子类是FeatureClass，则添加到axMapControl1中
      if(pDataset1 is IFeatureClass)
      {
         pFeatureLayer=new FeatureLayerClass();
         pFeatureLayer.FeatureClass=pFeatureWorkspace.OpenFeatureClass(pDataset1.Name);
         pFeatureLayer.Name = pFeatureLayer.FeatureClass.AliasName;
         axMapControl1.Map.AddLayer(pFeatureLayer);
         axMapControl1.ActiveView.Refresh();
      }
    }

三、CAD文件的加载：
IWorkspaceFactory pWorkspaceFactory;
IFeatureWorkspace pFeatureWorkspace;
IFeatureLayer pFeatureLayer;
IFeatureDataset pFeatureDataset;
//获取当前路径和文件名
OpenFileDialog dlg=new OpenFileDialog();
dlg.ShowDialog();
string strFullPath=dlg.FileName;
if(strFullPath=="") return;
int Index=strFullPath.LastIndexOf("//");
string filePath=strFullPath.Substring(0,Index);
string fileName=strFullPath.Substring(Index+1);
//打开CAD数据集
pWorkspaceFactory=new CadWorkspaceFactoryClass();
pFeatureWorkspace=(IFeatureWorkspace)pWorkspaceFactory.OpenFromFile(filePath,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 pFeatClassContainer=(IFeatureClassContainer)pFeatureDataset;
//对CAD文件中的要素进行遍历处理
for(int i=0;i<pFeatClassContainer.ClassCount-1;i++)
   {
      IFeatureClass pFeatClass=pFeatClassContainer.get_Class(i);
      if(pFeatClass.FeatureType==esriFeatureType.esriFTCoverageAnnotation)
          //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=pFeatClass.AliasName;
      pFeatureLayer.FeatureClass=pFeatClass;
      axMapControl1.Map.AddLayer(pFeatureLayer);
      axMapControl1.ActiveView.Refresh();
     }

四、栅格数据的加载：
      
    IWorkspaceFactory pWorkspaceFactory;
   IRasterWorkspace pRasterWorkspace;
   OpenFileDialog openFileDialog2=new OpenFileDialog();
   openFileDialog2.Filter="Layer File(*.lyr)|*.jpg;*.bmp;*.tiff";
   openFileDialog2.Title="Open Map File";
   openFileDialog2.ShowDialog();
   //获取当前路径和文件名
   string strFullPath=openFileDialog2.FileName;
   if(strFullPath=="") return;
   int Index=strFullPath.LastIndexOf("//");
   string fileName=strFullPath.Substring(Index+1);
   string filePath=strFullPath.Substring(0,Index);
     pWorkspaceFactory=new RasterWorkspaceFactoryClass();
     pRasterWorkspace=(IRasterWorkspace)pWorkspaceFactory.OpenFromFile(filePath,0);
     IRasterDataset pRasterDataset=(IRasterDataset)pRasterWorkspace.OpenRasterDataset(fileName);
     IRasterLayer pRasterLayer= new RasterLayerClass();
     pRasterLayer.CreateFromDataset(pRasterDataset);
     axMapControl1.Map.AddLayer(pRasterLayer);