/// <summary>
/// 获取面的符号
/// </summary>
/// <param name="pFeature">面要素</param>
/// <returns>符号</returns>
public static IFillSymbol GetFillSymbol(IFeature pFeature)
{
IFeatureLayer pfLayer = GeoDbUtils.GetFeatureLayer(pFeature);
IGeoFeatureLayer pGeofLayer = pfLayer as IGeoFeatureLayer;
IFeatureRenderer pFRenderer = pGeofLayer.Renderer;
ISymbol pSymbol = pFRenderer.get_SymbolByFeature(pFeature);
return(pSymbol as IFillSymbol);
}
/// <summary>
/// 获取指定要素的符号
/// </summary>
/// <param name="pFeature"></param>
/// <returns></returns>
public static IMarkerSymbol GetMarkSymbol(IFeature pFeature)
{
IFeatureClass pfClass = pFeature.Class as IFeatureClass;
IGeoFeatureLayer pGeofLayer = GeoDbUtils.GetFeatureLayer(pfClass.AliasName, true) as IGeoFeatureLayer;
//IGeoFeatureLayer pGeofLayer = pLayer as IGeoFeatureLayer;
IFeatureRenderer pFRenderer = pGeofLayer.Renderer;
ISymbol pSymbol = pFRenderer.get_SymbolByFeature(pFeature);
IMarkerSymbol pMarkerSymbol = pSymbol as IMarkerSymbol;
return(pMarkerSymbol);
}
/// <summary>
/// 根据要素获取符号
/// </summary>
/// <param name="pFeature">要素</param>
/// <returns>符号</returns>
public static ISymbol GetSymbol(IFeature pFeature)
{
IFeatureLayer pfLayer = GeoDbUtils.GetFeatureLayer(pFeature);
if (pfLayer != null && pfLayer is IGeoFeatureLayer)
{
IGeoFeatureLayer pGeoFLayer = (IGeoFeatureLayer)pfLayer;
IFeatureRenderer pfRenderer = pGeoFLayer.Renderer;
return(pfRenderer.get_SymbolByFeature(pFeature));
}
return(null);
}
/// <summary>
/// 刷新要素
/// </summary>
/// <param name="pActiveView">活动视口</param>
/// <param name="pFeature">要素</param>
public static void FeatureRefresh(IActiveView pActiveView, IFeature pFeature)
{
IGeometry pGeom = pFeature.Shape;
IFeatureLayer pFeatureLayer = GeoDbUtils.GetFeatureLayer(pFeature);
if (pGeom.GeometryType == esriGeometryType.esriGeometryPoint)
{
double length;
length = GeometryUtils.ConvertPixelsToMapUnits(pActiveView, 30);
ITopologicalOperator pTopo = (ITopologicalOperator)pGeom;
IGeometry pBuffer = pTopo.Buffer(length);
pActiveView.PartialRefresh((esriViewDrawPhase)(esriDrawPhase.esriDPGeography | esriDrawPhase.esriDPSelection), pFeatureLayer, pBuffer.Envelope);
}
else
{
pActiveView.PartialRefresh((esriViewDrawPhase)(esriDrawPhase.esriDPGeography | esriDrawPhase.esriDPSelection), pFeatureLayer, pGeom.Envelope);
}
}
/// <summary>
/// 清空地图要素选集
/// </summary>
/// <param name="pEditor">当前编辑接口</param>
/// <returns>无效区域（需要重绘）</returns>
//public static IInvalidArea3 ClearSelection(IEditor pEditor)
//{
// IInvalidArea3 pInvalidArea = new InvalidAreaClass();
// pInvalidArea.Display = pEditor.Display;
// IEnumFeature pEnum = (IEnumFeature)pEditor.Map.FeatureSelection;
// IFeature pFeature = null;
// while ((pFeature = pEnum.Next()) != null) { pInvalidArea.Add(pFeature); }
// pEditor.Map.ClearSelection();
// return pInvalidArea;
//}
/// <summary>
/// 设置旋转要素所在图层的旋转字段,建议使用mxd设置
/// </summary>
/// <param name="sRotationField">字段</param>
public static void SetRotateRenderer(string sRotationField)
{
IEnumLayer pEnumLayer = GeoDbUtils.GetFeatureLayers(true);
IFeatureLayer pfLayer = null;
while ((pfLayer = (IFeatureLayer)pEnumLayer.Next()) != null)
{
IFeatureClass pfClass = pfLayer.FeatureClass;
if (pfClass != null && pfClass.ShapeType == esriGeometryType.esriGeometryPoint)
{
if (pfClass.FindField(sRotationField) != -1)
{
IGeoFeatureLayer pGeofLayer = (IGeoFeatureLayer)pfLayer;
IRotationRenderer pRotRenderer = (IRotationRenderer)pGeofLayer.Renderer;
pRotRenderer.RotationField = sRotationField;
pRotRenderer.RotationType = esriSymbolRotationType.esriRotateSymbolArithmetic;
}
}
}
}
