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;
}