ArcEngine 分类标注

/// <summary>
/// 标注特定图层
/// </summary>
/// <param name="IN_Layer">要标注的图层</param>
/// <param name="IN_AxmapControl">要标注的地图控件</param>
public void PUB_ShowTargetFeature(ILayer IN_Layer,AxMapControl IN_AxmapControl)
{
//设定地图标注引擎
IAnnotateMap Temp_AnnotateMap = new AnnotateMapClass();
IN_AxmapControl.Map.AnnotationEngine = Temp_AnnotateMap;
//获取GeoFeaturelayer
IGeoFeatureLayer Temp_AnnotationLayer = IN_Layer as IGeoFeatureLayer;
//标注集合
IAnnotateLayerPropertiesCollection Temp_AllAnnoProps;
Temp_AllAnnoProps = Temp_AnnotationLayer.AnnotationProperties;
Temp_AllAnnoProps.Clear();//清理已有标注属性
//定义两种标注类并添加
IAnnotateLayerProperties Temp_Anno1 = PRV_SetProperties(Temp_AnnotationLayer, PRV_SetSymbol(null, 8, "Arial"), IN_AxmapControl, "DefaultClass", " OBJECTID >100 ", "[Shape_Length]  & vbnewline &\"———\"  &vbnewline& [Shape_Area]");
Temp_AllAnnoProps.Add(Temp_Anno1);
IAnnotateLayerProperties Temp_Anno2 = PRV_SetProperties(Temp_AnnotationLayer, PRV_SetSymbol(null, 8, "Arial"), IN_AxmapControl, "Class1", " OBJECTID < 100 ", "[OBJECTID]");
Temp_AllAnnoProps.Add(Temp_Anno2);
}

/// <summary>
/// 设定标注
/// </summary>
/// <param name="IN_FeatureLayer">要设定标注的图层</param>
/// <param name="IN_Symbol">标注表达式</param>
/// <param name="IN_AxmapControl">显示控件</param>
/// <param name="IN_ClassName">定义该种标注类型</param>
/// <param name="IN_ClassQuery">该种筛选方式</param>
/// <param name="IN_ClassExpression">标注表达式</param>
/// <returns>标注参数</returns>
private IAnnotateLayerProperties PRV_SetProperties(IFeatureLayer IN_FeatureLayer, ITextSymbol IN_Symbol, AxMapControl IN_AxmapControl, string IN_ClassName, string IN_ClassQuery, string IN_ClassExpression)
{
//标注表达式
ILabelEngineLayerProperties Temp_LabelEngine2 = new LabelEngineLayerPropertiesClass();
Temp_LabelEngine2.Expression = IN_ClassExpression;
//文字符号设定
Temp_LabelEngine2.Symbol = IN_Symbol;
//用来控制标注和要素的相对位置关系
ILineLabelPosition Temp_LineLpos = new LineLabelPositionClass();
Temp_LineLpos.Parallel = false;//修改标注的属性
Temp_LineLpos.Perpendicular = false;
Temp_LineLpos.InLine = true;
Temp_LineLpos.Above = false;
//用优先级来控制标注冲突
ILineLabelPlacementPriorities Temp_LinePlace = new LineLabelPlacementPrioritiesClass();
Temp_LinePlace.AboveStart = 1;
Temp_LinePlace.BelowAfter = 1;
//用来实现对ILineLabelPosition 和 ILineLabelPlacementPriorities以及更高级属性的控制
IBasicOverposterLayerProperties Temp_BasicOverPoster = new BasicOverposterLayerPropertiesClass();
Temp_BasicOverPoster.FeatureType = esriBasicOverposterFeatureType.esriOverposterPolygon;
Temp_BasicOverPoster.LineLabelPlacementPriorities = Temp_LinePlace;
Temp_BasicOverPoster.LineLabelPosition = Temp_LineLpos;
Temp_LabelEngine2.BasicOverposterLayerProperties = Temp_BasicOverPoster;
//设定标注
IMapOverposter Temp_MapPos = IN_AxmapControl.Map as IMapOverposter;
IOverposterProperties Temp_OverPoster = Temp_MapPos.OverposterProperties;
IAnnotateLayerProperties Temp_AnnoPClass = Temp_LabelEngine2 as IAnnotateLayerProperties;
//设定名称与筛选方式
Temp_AnnoPClass.Class = IN_ClassName;
Temp_AnnoPClass.WhereClause = IN_ClassQuery;
(IN_FeatureLayer as IGeoFeatureLayer).DisplayAnnotation = true;
return Temp_AnnoPClass;
}
/// <summary>
/// 设定标注符号
/// </summary>
/// <param name="IN_TextColor">字体颜色</param>
/// <param name="IN_TextSize">字体大小</param>
/// <param name="IN_FontName">字体名称</param>
/// <returns></returns>
private ITextSymbol PRV_SetSymbol(IRgbColor IN_TextColor,int IN_TextSize,string IN_FontName)
{
ITextSymbol Temp_TextSymbol = new TextSymbolClass(); ;
//文字颜色
if (IN_TextColor == null)
{
IN_TextColor = new RgbColorClass();
IN_TextColor.Red = 0;
IN_TextColor.Green = 0;
IN_TextColor.Blue = 0;
Temp_TextSymbol.Color = (IColor)IN_TextColor;
}
//文字字体与字号
Temp_TextSymbol.Size = IN_TextSize;
stdole.IFontDisp Temp_Font = new stdole.StdFontClass() as stdole.IFontDisp;
Temp_Font.Name = IN_FontName;
Temp_TextSymbol.Font = Temp_Font;
return Temp_TextSymbol;
}