ArcEngine 图层标注 (根据字段、角度)
用AE来控制图层是否显示标注,以及已哪一个字段作为标注的字段,以哪一个字段作为标注的角度,现将代码写下来,以备以后差用。
- public void EnableFeatureLayerLabel(IFeatureLayer pFeaturelayer, string sLableField, IRgbColor pRGB, int size, string angleField)
- {
- //判断图层是否为空
- if (pFeaturelayer == null)
- return;
- IGeoFeatureLayer pGeoFeaturelayer = (IGeoFeatureLayer)pFeaturelayer;
- IAnnotateLayerPropertiesCollection pAnnoLayerPropsCollection;
- pAnnoLayerPropsCollection = pGeoFeaturelayer.AnnotationProperties;
- pAnnoLayerPropsCollection.Clear();
- //stdole.IFontDisp pFont; //字体
- ITextSymbol pTextSymbol;
- //pFont.Name = “新宋体”;
- //pFont.Size = 9;
- //未指定字体颜色则默认为黑色
- if (pRGB == null)
- {
- pRGB = new RgbColorClass();
- pRGB.Red = 0;
- pRGB.Green = 0;
- pRGB.Blue = 0;
- }
- pTextSymbol = new TextSymbolClass();
- pTextSymbol.Color = (IColor)pRGB;
- pTextSymbol.Size = size; //标注大小
- IBasicOverposterLayerProperties4 pBasicOverposterlayerProps4 = new BasicOverposterLayerPropertiesClass();
- switch (pFeaturelayer.FeatureClass.ShapeType)//判断图层类型
- {
- case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolygon:
- pBasicOverposterlayerProps4.FeatureType = esriBasicOverposterFeatureType.esriOverposterPolygon;
- break;
- case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPoint:
- pBasicOverposterlayerProps4.FeatureType = esriBasicOverposterFeatureType.esriOverposterPoint;
- break;
- case ESRI.ArcGIS.Geometry.esriGeometryType.esriGeometryPolyline:
- pBasicOverposterlayerProps4.FeatureType = esriBasicOverposterFeatureType.esriOverposterPolyline;
- break;
- }
- pBasicOverposterlayerProps4.PointPlacementMethod = esriOverposterPointPlacementMethod.esriRotationField;
- pBasicOverposterlayerProps4.RotationField = angleField;
- ILabelEngineLayerProperties pLabelEnginelayerProps = new LabelEngineLayerPropertiesClass();
- pLabelEnginelayerProps.Expression = “[“ + sLableField + “]”;
- pLabelEnginelayerProps.Symbol = pTextSymbol;
- pLabelEnginelayerProps.BasicOverposterLayerProperties = pBasicOverposterlayerProps4 as IBasicOverposterLayerProperties;
- pAnnoLayerPropsCollection.Add((IAnnotateLayerProperties)pLabelEnginelayerProps);
- pGeoFeaturelayer.DisplayAnnotation = true;//很重要,必须设置
- //axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewBackground, null, null); }
- }
转载自:https://blog.csdn.net/hsg77/article/details/44003275