ArcEngine中同时闪烁多个要素的用户控件代码转

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ArcEngine中同时闪烁多个要素的用户控件代码转

2012年10月26日 ⁄ 综合 ⁄ 共 4803字 ⁄ 字号小中大 ⁄ 评论关闭

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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using System; 

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using System.Collections.Generic; 

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using System.ComponentModel; 

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using System.Drawing; 

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using System.Data; 

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using System.Linq; 

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using System.Text; 

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using System.Windows.Forms; 

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using ESRI.ArcGIS.Geodatabase; 

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using ESRI.ArcGIS.Carto; 

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using ESRI.ArcGIS.Display; 

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using ESRI.ArcGIS.Geometry; 

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using ESRI.ArcGIS.Controls; 

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using ESRI.ArcGIS.esriSystem; 

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namespace AgsTester 

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{ 

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    /// <summary> 

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    /// 本用户控件上需要放一个地图控件 

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    /// </summary> 

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    public partial class FlashMutiGeometry : UserControl 

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    { 

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        public FlashMutiGeometry() 

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        { 

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            InitializeComponent(); 

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        } 

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        /// <summary> 

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        /// 加载地图 

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        /// </summary> 

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

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        public void LoadMap(string pathMap) 

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        { 

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            axMapControl1.LoadMxFile(pathMap); 

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        } 

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        /// <summary> 

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        /// 以村为单位过滤显示 

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        /// </summary> 

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

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        public void FilterLayer(string where) 

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        { 

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

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            IFeatureClass fcls = flyr.FeatureClass; 

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            IQueryFilter queryFilter = new QueryFilterClass(); 

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            queryFilter.WhereClause = where; 

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            // 缩放到选择结果集，并高亮显示 

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            ZoomToSelectedFeature(flyr, queryFilter); 

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            //闪烁选中得图斑 

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

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            FlashPolygons(featureCursor); 

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        } 

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        /// <summary> 

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        /// 缩放到选择结果集，并高亮显示 

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        /// </summary> 

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

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

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        private void ZoomToSelectedFeature(IFeatureLayer pFeatureLyr, IQueryFilter pQueryFilter) 

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        { 

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            #region 高亮显示查询到的要素集合 

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            //符号边线颜色 

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            IRgbColor pLineColor = new RgbColor(); 

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            pLineColor.Red = 255; 

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            ILineSymbol ilSymbl = new SimpleLineSymbolClass(); 

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            ilSymbl.Color = pLineColor; 

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            ilSymbl.Width = 5; 

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            //定义选中要素的符号为红色 

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            ISimpleFillSymbol ipSimpleFillSymbol = new SimpleFillSymbol(); 

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            ipSimpleFillSymbol.Outline = ilSymbl; 

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            RgbColor pFillColor = new RgbColor(); 

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            pFillColor.Green = 60; 

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            ipSimpleFillSymbol.Color = pFillColor; 

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            ipSimpleFillSymbol.Style = esriSimpleFillStyle.esriSFSForwardDiagonal; 

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            //选取要素集 

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            IFeatureSelection pFtSelection = pFeatureLyr as IFeatureSelection; 

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            pFtSelection.SetSelectionSymbol = true; 

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            pFtSelection.SelectionSymbol = (ISymbol)ipSimpleFillSymbol; 

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

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            #endregion 

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            ISelectionSet pSelectionSet = pFtSelection.SelectionSet; 

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            //居中显示选中要素 

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            IEnumGeometry pEnumGeom = new EnumFeatureGeometry(); 

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            IEnumGeometryBind pEnumGeomBind = pEnumGeom as IEnumGeometryBind; 

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            pEnumGeomBind.BindGeometrySource(null, pSelectionSet); 

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            IGeometryFactory pGeomFactory = new GeometryEnvironmentClass(); 

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            IGeometry pGeom = pGeomFactory.CreateGeometryFromEnumerator(pEnumGeom); 

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            axMapControl1.ActiveView.Extent = pGeom.Envelope; 

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            axMapControl1.ActiveView.Refresh(); 

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        } 

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        /// <summary> 

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        /// 闪烁选中得图斑 

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        /// </summary> 

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

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        private void FlashPolygons(IFeatureCursor featureCursor) 

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        { 

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            IArray geoArray = new ArrayClass(); 

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            IFeature feature = null; 

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

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            { 

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                //feature是循环外指针，所以必须用ShapeCopy 

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                geoArray.Add(feature.ShapeCopy); 

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            } 

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            //通过IHookActions闪烁要素集合 

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            HookHelperClass m_pHookHelper = new HookHelperClass(); 

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            m_pHookHelper.Hook = axMapControl1.Object; 

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            IHookActions hookActions = (IHookActions)m_pHookHelper; 

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            hookActions.DoActionOnMultiple(geoArray, esriHookActions.esriHookActionsPan); 

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

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

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            Application.DoEvents(); 

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            m_pHookHelper.ActiveView.ScreenDisplay.UpdateWindow(); 

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            hookActions.DoActionOnMultiple(geoArray, esriHookActions.esriHookActionsFlash); 

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        } 

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    } 

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}