ArcEngine中同时闪烁多个要素的用户控件代码 转

关键点：

对IArray、IFeature.ShapeCopy、HookHelperClass以及IHookActions.DoActionOnMultiple的正确使用。

代码如下：

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001	using System;

002	using System.Collections.Generic;

003	using System.ComponentModel;

004	using System.Drawing;

005	using System.Data;

006	using System.Linq;

007	using System.Text;

008	using System.Windows.Forms;

009	using ESRI.ArcGIS.Geodatabase;

010	using ESRI.ArcGIS.Carto;

011	using ESRI.ArcGIS.Display;

012	using ESRI.ArcGIS.Geometry;

013	using ESRI.ArcGIS.Controls;

014	using ESRI.ArcGIS.esriSystem;

015

016	namespace AgsTester

017

{

018	/// <summary>

019	/// 本用户控件上需要放一个地图控件

020	/// </summary>

021	public partial class FlashMutiGeometry : UserControl

022

{

023	public FlashMutiGeometry()

024

{

025	InitializeComponent();

026

}

027

028	/// <summary>

029

/// 加载地图

030	/// </summary>

031	/// <param name="pathMap"></param>

032	public void LoadMap(string pathMap)

033

{

034	axMapControl1.LoadMxFile(pathMap);

035

}

036

037	/// <summary>

038	/// 以村为单位过滤显示

039	/// </summary>

040	/// <param name="where">查询条件</param>

041	public void FilterLayer(string where)

042

{

043	IFeatureLayer flyr = (IFeatureLayer)axMapControl1.get_Layer(0);

044	IFeatureClass fcls = flyr.FeatureClass;

045

046	IQueryFilter queryFilter = new QueryFilterClass();

047	queryFilter.WhereClause = where;

048

049	// 缩放到选择结果集，并高亮显示

050	ZoomToSelectedFeature(flyr, queryFilter);

051

052

//闪烁选中得图斑

053	IFeatureCursor featureCursor = fcls.Search(queryFilter, true);

054	FlashPolygons(featureCursor);

055

}

056

057	/// <summary>

058	/// 缩放到选择结果集，并高亮显示

059	/// </summary>

060	/// <param name="pFeatureLyr"></param>

061	/// <param name="pQueryFilter"></param>

062	private void ZoomToSelectedFeature(IFeatureLayer pFeatureLyr, IQueryFilter pQueryFilter)

063

{

064	#region 高亮显示查询到的要素集合

065

066

//符号边线颜色

067	IRgbColor pLineColor = new RgbColor();

068	pLineColor.Red = 255;

069	ILineSymbol ilSymbl = new SimpleLineSymbolClass();

070	ilSymbl.Color = pLineColor;

071	ilSymbl.Width = 5;

072

073	//定义选中要素的符号为红色

074	ISimpleFillSymbol ipSimpleFillSymbol = new SimpleFillSymbol();

075	ipSimpleFillSymbol.Outline = ilSymbl;

076	RgbColor pFillColor = new RgbColor();

077	pFillColor.Green = 60;

078	ipSimpleFillSymbol.Color = pFillColor;

079	ipSimpleFillSymbol.Style = esriSimpleFillStyle.esriSFSForwardDiagonal;

080

081

//选取要素集

082	IFeatureSelection pFtSelection = pFeatureLyr as IFeatureSelection;

083	pFtSelection.SetSelectionSymbol = true;

084	pFtSelection.SelectionSymbol = (ISymbol)ipSimpleFillSymbol;

085	pFtSelection.SelectFeatures(pQueryFilter, esriSelectionResultEnum.esriSelectionResultNew, false);

086

087	#endregion

088

089	ISelectionSet pSelectionSet = pFtSelection.SelectionSet;

090	//居中显示选中要素

091	IEnumGeometry pEnumGeom = new EnumFeatureGeometry();

092	IEnumGeometryBind pEnumGeomBind = pEnumGeom as IEnumGeometryBind;

093	pEnumGeomBind.BindGeometrySource(null, pSelectionSet);

094	IGeometryFactory pGeomFactory = new GeometryEnvironmentClass();

095	IGeometry pGeom = pGeomFactory.CreateGeometryFromEnumerator(pEnumGeom);

096

097	axMapControl1.ActiveView.Extent = pGeom.Envelope;

098	axMapControl1.ActiveView.Refresh();

099

}

100

101	/// <summary>

102	/// 闪烁选中得图斑

103	/// </summary>

104	/// <param name="featureCursor"></param>

105	private void FlashPolygons(IFeatureCursor featureCursor)

106

{

107	IArray geoArray = new ArrayClass();

108	IFeature feature = null;

109	while ((feature = featureCursor.NextFeature()) != null)

110

{

111	//feature是循环外指针，所以必须用ShapeCopy

112	geoArray.Add(feature.ShapeCopy);

113

}

114

115	//通过IHookActions闪烁要素集合

116	HookHelperClass m_pHookHelper = new HookHelperClass();

117	m_pHookHelper.Hook = axMapControl1.Object;

118	IHookActions hookActions = (IHookActions)m_pHookHelper;

119

120	hookActions.DoActionOnMultiple(geoArray, esriHookActions.esriHookActionsPan);

121	//hookActions.DoActionOnMultiple(geoArray, esriHookActions.esriHookActionsGraphic);

122	//hookActions.DoActionOnMultiple(geoArray, esriHookActions.esriHookActionsZoom);

123	Application.DoEvents();

124	m_pHookHelper.ActiveView.ScreenDisplay.UpdateWindow();

125

126	hookActions.DoActionOnMultiple(geoArray, esriHookActions.esriHookActionsFlash);

127

}

128

}

129

}

截图如下：

来自http://www.cnblogs.com/flyingfish/archive/2010/02/11/1667533.html