CAD注记层转到SDE Annotation Features本文会提到两种方式，不过都是要添加一个element，所以，首先给出一个创建element的函数

ITextElementPtr MakeTextElement(CString strText, double x, double y) {
       HRESULT hr;     ITextElementPtr ipTextElement(CLSID_TextElement);     hr = ipTextElement->put_ScaleText(VARIANT_TRUE);     hr = ipTextElement->put_Text(CComBSTR(strText));     IGroupSymbolElementPtr ipGroupSymEle = ipTextElement;     ipGroupSymEle->put_SymbolID(0);     IPointPtr ipPoint(CLSID_Point);     ipPoint->put_X(x);     ipPoint->put_Y(y);     IElementPtr ipElement = ipTextElement;     ipElement->put_Geometry(ipPoint);     return ipTextElement; }

第一种办法，通过IFDOGraphicsLayer添加Elements的方式实现，实现办法如下

BOOL AddTextElementEx(CString strText, double x, double y) {
       HRESULT hr;     IFeatureWorkspacePtr ipFeatWorkspace = m_ipWorkspace;     if(ipFeatWorkspace == NULL)         return FALSE;     IFeatureClassPtr ipFeatureClass;     hr = ipFeatWorkspace->OpenFeatureClass(CComBSTR(_T("abc")),&ipFeatureClass);     IWorkspaceEditPtr ipWorkspaceEdit = m_ipWorkspace;     if(ipWorkspaceEdit==NULL)         return FALSE;     IDatasetPtr ipDataset(ipFeatureClass);     IFDOGraphicsLayerFactoryPtr ipFDOGLFactory(CLSID_FDOGraphicsLayerFactory);        IWorkspacePtr ipWs;     ipDataset->get_Workspace(&ipWs);     IFeatureWorkspacePtr ipFeatWs(ipWs);     IFeatureDatasetPtr ipFeatDataset;     ipFeatureClass->get_FeatureDataset(&ipFeatDataset);     ILayerPtr ipLayer;     BSTR bstr;     hr = ipDataset->get_Name(&bstr);     hr = ipFDOGLFactory->OpenGraphicsLayer(ipFeatWs,ipFeatDataset,bstr,&ipLayer);     if(FAILED(hr))

return FALSE;IFDOGraphicsLayerPtr ipFDOGLayer(ipLayer);

IElementCollectionPtr ipElementColl;     hr = ipElementColl.CreateInstance(CLSID_ElementCollection);     if(FAILED(hr)||ipElementColl==NULL)         return FALSE;     ITextElementPtr ipTextElement = MakeTextElement(strText,x,y);     hr = ipElementColl->Add((IElementPtr)ipTextElement,-1);     hr = ipFDOGLayer->BeginAddElements();     hr = ipFDOGLayer->DoAddElements(ipElementColl,0);     hr = ipFDOGLayer->EndAddElements();     return TRUE; }

　第二种方式，通过IAnnotationFeature来实现，实现代码如下

BOOL AddTextElement(CString strText, double x, double y) {
       HRESULT hr;     IFeatureWorkspacePtr ipFeatWorkspace = m_ipWorkspace;     if(ipFeatWorkspace == NULL)         return FALSE;     IFeatureClassPtr ipFeatureClass;     hr = ipFeatWorkspace->OpenFeatureClass(CComBSTR(_T("abc")),&ipFeatureClass);     IWorkspaceEditPtr ipWorkspaceEdit = m_ipWorkspace;     if(ipWorkspaceEdit==NULL)         return FALSE;     hr = ipWorkspaceEdit->StartEditing(TRUE);     hr = ipWorkspaceEdit->StartEditOperation();     hr = ipWorkspaceEdit->EnableUndoRedo();     IElementPtr ipElement = MakeTextElement(strText,x , y);     IAnnotationFeaturePtr ipAnnotationFeature = ipFeature;     if(ipAnnotationFeature == NULL)         return FALSE;     hr=ipAnnotationFeature->put_Annotation(ipElement);     ipWorkspaceEdit->DisableUndoRedo();     ipWorkspaceEdit->StopEditOperation();     ipWorkspaceEdit->StopEditing(TRUE);     return TRUE; }

　　这两种方法，经过实际测试都可以成功，在导入的时候还需要注意一下空间参考系的问题，需要对应上，特别要注意dwg中的数据是否正确，如果注记的坐标不在参考系范围内，会出现导入失败的现象，我就是因为这个低级的错误，纠结了两天。

　　

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