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 = esriMaplexPolygonPlacementMethod.esriMaplexHorizontalInPolygon;            pMaplexPro.CanPlaceLabelOutsidePolygon = false;            pMaplexPro.CanRemoveOverlappingLabel = false;            pMaplexPro.RepeatLabel = false;            pLabelEngine2.OverposterLayerProperties = pMaplexPro as IOverposterLayerProperties;            IMapOverposter pMapPos = axMapControl1.Map as IMapOverposter;            IOverposterProperties pOP = pMapPos.OverposterProperties;            IMaplexOverposterProperties pMaplexOP = pOP as IMaplexOverposterProperties;            pMaplexOP.LabelLargestPolygon = false;            pAnnoProps.Add(pLabelEngine2 as IAnnotateLayerProperties);            pGeoFeatLyr.DisplayAnnotation = true;        }