private void LayerAnnotation(IGeoFeatureLayer pGeoFeatLyr, string annoField)
{
IGeoFeatureLayer pGeoFeatLayer;
pGeoFeatLayer = pGeoFeatLyr;
IAnnotateLayerPropertiesCollection pAnnoProps;
pAnnoProps = pGeoFeatLyr.AnnotationProperties;
pAnnoProps.Clear();
IAnnotateLayerProperties pAnnoLayerProps;
ILabelEngineLayerProperties pLabelEngine;
ILineLabelPosition pPosition;
ILineLabelPlacementPriorities pPlacement;
IBasicOverposterLayerProperties pBasic;
//'定义标注的字体
ITextSymbol pTextSyl;
pTextSyl = new TextSymbol();
stdole.IFontDisp pFont;
pFont = new stdole.StdFont() as stdole.IFontDisp;
pFont.Name = "仿宋";
pFont.Size = 12;
pFont.Bold = true;
pTextSyl.Font = pFont;
IRgbColor pcolor = new RgbColorClass();
pcolor.Red = 255;
pcolor.Green = 10;
pcolor.Blue = 20;
pTextSyl.Color = pcolor;
pPosition = new LineLabelPosition();
pPosition.Parallel = false;
pPosition.Perpendicular = true;
pPlacement = new LineLabelPlacementPriorities();
pBasic = new BasicOverposterLayerProperties();
pBasic.FeatureType = esriBasicOverposterFeatureType.esriOverposterPolyline;
pBasic.LineLabelPlacementPriorities = pPlacement;
pBasic.LineLabelPosition = pPosition;
pLabelEngine = new LabelEngineLayerProperties() as ILabelEngineLayerProperties;
pLabelEngine.Symbol = pTextSyl;
pLabelEngine.BasicOverposterLayerProperties = pBasic;
//field的形式必须是[fieldname]
pLabelEngine.Expression = annoField;
pAnnoLayerProps = (IAnnotateLayerProperties)pLabelEngine;
pAnnoProps.Add(pAnnoLayerProps);
pGeoFeatLyr.DisplayAnnotation = true;
axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
}
//文本标注
private void btnTextElement_Click(object sender, EventArgs e)
{
if (axMapControl1.LayerCount > 0)
{
IGeoFeatureLayer pGeoFeatureLayer;
ILineLabelPosition pLineLabelPosition;
ILabelEngineLayerProperties pLabelEngineLayerProperties;
IAnnotateLayerProperties pAnnotateLayerProperties;
pGeoFeatureLayer = (IGeoFeatureLayer)axMapControl1.get_Layer(0);
pGeoFeatureLayer.AnnotationProperties.Clear();
pLineLabelPosition = new LineLabelPosition();
pLineLabelPosition.Above = false;
pLineLabelPosition.AtEnd = false;
pLineLabelPosition.Below = false;
pLineLabelPosition.Horizontal = false;
pLineLabelPosition.InLine = true;
pLineLabelPosition.OnTop = true;
pLineLabelPosition.Parallel = true;
pLineLabelPosition.ProduceCurvedLabels = true;
ITextSymbol pTextSymbol = new TextSymbol();
IColor pColor = new RgbColor();
pColor.RGB = 100;
pTextSymbol.Size = 12;
pTextSymbol.Font.Name = "宋体";
pTextSymbol.Color = pColor;
pLabelEngineLayerProperties = new LabelEngineLayerProperties() as ILabelEngineLayerProperties;
pLabelEngineLayerProperties.Symbol = pTextSymbol;
pLabelEngineLayerProperties.IsExpressionSimple = true;
pLabelEngineLayerProperties.Expression = "[DESCRIP]";//需要中括号,这里显示NAME字段属性
pLabelEngineLayerProperties.BasicOverposterLayerProperties.LineLabelPosition = pLineLabelPosition;
pAnnotateLayerProperties = (IAnnotateLayerProperties)pLabelEngineLayerProperties;
pAnnotateLayerProperties.DisplayAnnotation = true;
pAnnotateLayerProperties.FeatureLayer = pGeoFeatureLayer;
pAnnotateLayerProperties.LabelWhichFeatures = esriLabelWhichFeatures.esriAllFeatures;
pAnnotateLayerProperties.WhereClause = "";
pGeoFeatureLayer.AnnotationProperties.Add(pAnnotateLayerProperties);
pGeoFeatureLayer.DisplayAnnotation = true;
axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);
axMapControl1.ActiveView.Refresh();
}
}
