矢量图层标注

        public void Annotation(IGeoFeatureLayer pGeoFeatLyr, IMap pMap, string annoField)
        {
            IAnnotateMap pAnnoMap;
            pAnnoMap = new MaplexAnnotateMapClass();
            pMap.AnnotationEngine = pAnnoMap;
            IGeoFeatureLayer pGeoFeatLayer;
            pGeoFeatLayer = pGeoFeatLyr;
            IAnnotateLayerPropertiesCollection pAnnoProps;
            pAnnoProps = pGeoFeatLyr.AnnotationProperties;
            pAnnoProps.Clear();
            ILabelEngineLayerProperties2 pLabelEngine2 = new MaplexLabelEngineLayerPropertiesClass();
            pLabelEngine2.Expression = "[" + annoField + "]";

            IMaplexOverposterLayerProperties pMaplexPro = new MaplexOverposterLayerPropertiesClass();
            pMaplexPro.FeatureType = esriBasicOverposterFeatureType.esriOverposterPolygon;
            pMaplexPro.PolygonPlacementMethod = esriMaplexPolygonPlacementMeth