Mapx添加永久图层

    CMapXLayerInfo LayerInfo ;

    CMapXFields MapFields ;
    
     try {

        LayerInfo.CreateDispatch( LayerInfo.GetClsid() ) ;
        MapFields.CreateDispatch( MapFields.GetClsid() );

        MapFields.AddIntegerField(  " C_ID "  , TRUE ) ;
        MapFields.AddStringField(  " Name "  ,  32  ) ;

        COleVariant vFields;
        vFields.vt  =  VT_DISPATCH ;
        vFields.pdispVal  =  MapFields;
        vFields.pdispVal -> AddRef();

        LayerInfo.SetType( miLayerInfoTypeNewTable );   // 如果是miLayerInfoTypeTemp，则为临时图层
        LayerInfo.AddParameter( " Filespec "  , COleVariant( " peirenlei " ) );
        LayerInfo.AddParameter( " Name "  , COleVariant( " peirenlei " )  );
        LayerInfo.AddParameter( " Fields " , vFields );

        m_ctrlMapX.GetLayers().Add( LayerInfo );
        
    }
     catch (COleDispatchException *  e) {
        e -> ReportError();
        e -> Delete();
    }  catch (COleException *  e) {
        e -> ReportError();
        e -> Delete();
    }