public void FlashObjects(LayerIdentifiedResult layerFlash) { screenDisplay.StartDrawing(screenDisplay.hDC, (System.Int16)ESRI.ArcGIS.Display.esriScreenCache.esriNoScreenCache); switch (layerFlash.GeometryType) { case LayerFeatureType.Point: screenDisplay.SetSymbol(pointSymbol); break; case LayerFeatureType.Polyline: screenDisplay.SetSymbol(lineSymbol); break; case LayerFeatureType.Polygon: screenDisplay.SetSymbol(regionSymbol); break; default: return; } List<IFeatureIdentifyObj> identifyObjDefault = layerFlash.IdentifiedFeatureObjList; for (int i = 0; i < identifyObjDefault.Count; i++) { IFeature featureDefault = (identifyObjDefault[i] as IRowIdentifyObject).Row as IFeature; switch (layerFlash.GeometryType) { case LayerFeatureType.Point: screenDisplay.DrawPoint(featureDefault.Shape); break; case LayerFeatureType.Polyline: screenDisplay.DrawPolyline(featureDefault.Shape); break; case LayerFeatureType.Polygon: screenDisplay.DrawPolygon(featureDefault.Shape); break; } } Thread.Sleep(500); screenDisplay.FinishDrawing(); mapControl2.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewForeground, null, null); }
/// <summary> /// 执行属性查询 /// 尚未实现如何闪烁选中要素集合 /// 以及进度条的显示 /// </summary> /// <param name="searchLayers"></param> private void ExecuteIdentify(List<LayerFilterProperties> searchLayers, IGeometry identifyGeom) { object Missing = Type.Missing; //清空以前所有的查询结果先 identifiedResultsList.Clear(); //用于计算查询得到的要素的数量 int identifiedObjCount = 0; //获取用于查询的图层的数量 int searchLayersCount = searchLayers.Count; //初始化进度条 IdentifyProgress.Visible = true; IdentifyProgress.Maximum = searchLayersCount; //初始化闪烁对象 flashObjects.MapControl = pAxMapControl.Object as IMapControl2; flashObjects.Init(); //遍历所有图层 for (int i = 0; i < searchLayersCount; i++) { LayerFilterProperties filterProps = searchLayers[i]; ILayer layer = filterProps.TargetLayer; //新建查询结果列表对象 LayerIdentifiedResult layerIdentifiedResult = new LayerIdentifiedResult(); //先保存查询图层对象 layerIdentifiedResult.IdentifyLayer = layer; layerIdentifiedResult.GeometryType = filterProps.LayerFeatureType; //首先获得查询结果列表对象,以备后面往里添加结果使用 List<IFeatureIdentifyObj> identifiedObjList = layerIdentifiedResult.IdentifiedFeatureObjList; //执行查询,返回查询结果 IArray identifyResult = Identify(layer, identifyGeom); //处理异常情况 if (identifyResult != null) { //依次获取每一个查询结果对象 for (int k = 0; k < identifyResult.Count; k++) { identifiedObjCount++; IFeatureIdentifyObj identifiedFeatureObj = identifyResult.get_Element(k) as IFeatureIdentifyObj; //闪烁要素 IFeature identifiedFeature = (identifiedFeatureObj as IRowIdentifyObject).Row as IFeature; //添加闪烁图形 flashObjects.AddGeometry(identifiedFeature.Shape); //保存查询结果 identifiedObjList.Add(identifiedFeatureObj); } identifiedResultsList.Add(layerIdentifiedResult); } //显示查询进度 IdentifyProgress.Value = i + 1; Application.DoEvents(); } //隐藏进度条 IdentifyProgress.Visible = false; //显示查询到的要素数量 lblFeatureCount.Text = "查询到 " + identifiedObjCount + " 条记录"; }