转自原文

  好久没有写博文了，这段时间相对空闲一点，把AE数据编辑实现总结下。

要编辑要素，首先要选中要素，按shift键进行多选，按esc键清空选择。

个人了解的选择高亮显示有两种方式，都是在public override void OnMouseDown(int Button, int Shift, int X, int Y)事件中处理实现：

1、  IFeatureSelection 这个要求明确选择的图层

IPoint pPoint = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y);IEnvelope pEnvelope;double tol = 20;pEnvelope = pPoint.Envelope;pEnvelope.Width = pEnvelope.Width + tol;pEnvelope.Height = pEnvelope.Height + tol;pEnvelope.CenterAt(pPoint); ISpatialFilter pSpatialFilter;pSpatialFilter = new SpatialFilterClass();pSpatialFilter.Geometry = pEnvelope;pSpatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelIntersects;IFeatureSelection pFeatureSelection;pFeatureSelection = ucDrawPanel.currentFeatureLayer as IFeatureSelection;IFeature pFeature;ucDrawPanel.unionFeature = new List
       
        ();//实例化合并要素集if (Shift == 1){    if (ucDrawPanel.currentFeatureLayer.FeatureClass.ShapeType == esriGeometryType.esriGeometryPolyline)    {        pFeatureSelection.SelectFeatures(pSpatialFilter,            esriSelectionResultEnum.esriSelectionResultAdd, true);        ICursor pCursor;        pFeatureSelection.SelectionSet.Search(null, false, out pCursor);    }}else{    pActiveView.FocusMap.ClearSelection();    pFeatureSelection.SelectFeatures(pSpatialFilter,        esriSelectionResultEnum.esriSelectionResultNew, true);     ICursor pCursor;    pFeatureSelection.SelectionSet.Search(null, false, out pCursor);                 }pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, ucDrawPanel.currentFeatureLayer, null);//高亮显示出来ISimpleFillSymbol iFillSymbol;ISymbol iSymbol;IRgbColor iRgbColor;iFillSymbol = new SimpleFillSymbol();iFillSymbol.Style = esriSimpleFillStyle.esriSFSSolid;iRgbColor = new RgbColor();iRgbColor.Green = 128;iFillSymbol.Color = iRgbColor;iSymbol = (ISymbol)iFillSymbol;iSymbol.ROP2 = esriRasterOpCode.esriROPNotXOrPen; IEnumFeature pEnumFeature = pActiveView.FocusMap.FeatureSelection as IEnumFeature;pEnumFeature.Reset();pFeature = pEnumFeature.Next();//选中要素高亮显示if (pFeature != null){    IGeometry pGeometry = pFeature.Shape;    ITopologicalOperator pTop = pGeometry as ITopologicalOperator;    while (pFeature != null)    {        ucDrawPanel.unionFeature.Add(pFeature);         pGeometry = pTop.Union(pFeature.Shape);        pTop = pGeometry as ITopologicalOperator;        pFeature = pEnumFeature.Next();    }    ucDrawPanel.currentFeature = ucDrawPanel.unionFeature[ucDrawPanel.unionFeature.Count - 1];    _mapCtrl.FlashShape(pGeometry, 1, 500, iSymbol);}//清空选择要素else{    pActiveView.FocusMap.ClearSelection();    pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, pActiveView.Extent);}
       

 

2、  SelectByMap 基于整个地图，当然也可以先将图层的selectable属性动态设置下

 

if (Button == 1){    //清空地图视图    _mapCtrl.Map.ClearSelection();    IGraphicsContainer pContainer = _mapCtrl.Map as IGraphicsContainer;    pContainer.DeleteAllElements();    _mapCtrl.ActiveView.Refresh();     base.OnMouseDown(Button, Shift, X, Y);     IActiveView pActiveView = _mapCtrl.ActiveView;    IPoint pPoint = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(X, Y);    IPoint TempPoint = pActiveView.ScreenDisplay.DisplayTransformation.ToMapPoint(X + 5, Y + 5);     IEnvelope objEnvelope;    double tol = Math.Abs(TempPoint.X - pPoint.X);    objEnvelope = pPoint.Envelope;    objEnvelope.Width = objEnvelope.Width + tol;    objEnvelope.Height = objEnvelope.Height + tol;    objEnvelope.CenterAt(pPoint);    setSelectable(ucDrawPanel.currentLayerName);//只有当前编辑图层可选     _mapCtrl.Map.SelectByShape((IGeometry)objEnvelope, null, true);//只选择一个要素    pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, _mapCtrl.ActiveView.Extent);     ucDrawPanel.currentFeatureLayer = GetLayerByName(_mapCtrl, ucDrawPanel.currentLayerName);    if (ucDrawPanel.currentFeatureLayer != null)    {        ucDrawPanel.currentFeature = GetFeatureBySelection(ucDrawPanel.currentFeatureLayer);    }    else    {        MessWin messWin = new MessWin();        messWin.SetTitleAndMess("提示", @"获取选择要素出错！", false);        return;    }}

PS：esc键退出，在OnKeyDown事件中实现

public override void OnKeyDown(int keyCode, int Shift){    if (keyCode == (int)Keys.Escape)    {        IActiveView pActiveView = _mapCtrl.ActiveView;        pActiveView.FocusMap.ClearSelection();        pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, pActiveView.Extent);        _mapCtrl.CurrentTool = null;    }}