CAD注记层转到SDE Annotation Features（ArcEngine，C++实现）

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。

　　

参考资料：http://www.cnblogs.com/iswszheng/archive/2009/03/18/1415496.html

http://blog.sina.com.cn/s/blog_5432e0220100kzui.html