ArcEngine 图层标注 （根据字段、角度）
今天做了一个用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/chanyinhelv/article/details/8845466
