C#AE通过字段去标注注记要素

通过在网上查阅资料终于将图层注记功能实现：

pFeatureLayer为即将要注记的图层

fieldname为注记字段

public static void AddlableTolayer(IFeatureLayer pFeatureLayer, string fieldname)
        {

            //IGeoFeatureLayer继承了IFeatureLayer，在此基础上多了注记功能
            IGeoFeatureLayer pGeoFeatureLayer = pFeatureLayer as IGeoFeatureLayer;
            pGeoFeatureLayer.DisplayAnnotation = true;//允许标注
            IFeatureClass pFeatureClass;
            pFeatureClass = pGeoFeatureLayer.FeatureClass;
            //矢量图层标注信息设置
            IAnnotateLayerPropertiesCollection pAnnotateLayerPropertiesCollection;
            pAnnotateLayerPropertiesCollection = pGeoFeatureLayer.AnnotationProperties;
            pAnnotateLayerPropertiesCollection.Clear();
            //定义一个矢量图层动态标注显示
            IAnnotateLayerProperties pAnnotateLayerProperties;
            //定义控制线标注的相对位置
            ILineLabelPosition pLineLabelPosition;
            //控制线标注的属性设置
            ILineLabelPlacementPriorities pLineLabelPlacementPriorities;
            IBasicOverposterLayerProperties pBasicOverposterLayerProperties;
            ILabelEngineLayerProperties pLabelEngineLayerProperties;

            pLineLabelPosition = new LineLabelPositionClass();
            pLineLabelPosition.Parallel = false;//标注是否水平
            pLineLabelPosition.Perpendicular = true;//标注是否垂直
            pLineLabelPlacementPriorities = new LineLabelPlacementPrioritiesClass();
            pBasicOverposterLayerProperties = new BasicOverposterLayerPropertiesClass();
            pBasicOverposterLayerProperties.FeatureType = esriBasicOverposterFeatureType.esriOverposterPolyline;
            pBasicOverposterLayerProperties.LineLabelPlacementPriorities = pLineLabelPlacementPriorities;
            pBasicOverposterLayerProperties.LineLabelPosition = pLineLabelPosition;

            pLabelEngineLayerProperties = new LabelEngineLayerPropertiesClass();
            pLabelEngineLayerProperties.BasicOverposterLayerProperties = pBasicOverposterLayerProperties;
            pLabelEngineLayerProperties.Symbol.Size = 12;//字体大小
            pLabelEngineLayerProperties.Expression = "[" + fieldname + "]";//标注字段
            pAnnotateLayerProperties = pLabelEngineLayerProperties as IAnnotateLayerProperties;

             //添加标注图层
            pAnnotateLayerPropertiesCollection.Add(pAnnotateLayerProperties);
        }

结果展示如下：