AE 线编辑

转自原文 AE 线编辑

1、高亮显示节点

//高亮显示节点和端点
public void HighLightNode()
{
    //清空
    _mapCtrl.Map.ClearSelection();
    _mapCtrl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeoSelection, null, _mapCtrl.ActiveView.Extent);
    var pGraphicsContainer = _mapCtrl.Map as IGraphicsContainer;
    pGraphicsContainer.DeleteAllElements();
    _mapCtrl.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, _mapCtrl.ActiveView.Extent);  

    //增加
    ISimpleFillSymbol simpleFillSymbol = new SimpleFillSymbolClass();
    ISimpleLineSymbol simpleLineSymbol = new SimpleLineSymbolClass
    {
        Color = new RgbColorClass { Red = , Green = , Blue =  },
        Width = ,
        Style = esriSimpleLineStyle.esriSLSSolid
    };  

    ISimpleMarkerSymbol simpleMarkerSymbol = new SimpleMarkerSymbolClass
    {
        Color =
            new RgbColorClass { Red = , Green = , Blue =  },
        Style = esriSimpleMarkerStyle.esriSMSCircle,
        Size =
    };
    switch (currentFeature.Shape.GeometryType)
    {
        case esriGeometryType.esriGeometryPoint:
            //IMarkerElement pMarkerElement = new MarkerElementClass();
            //pMarkerElement.Symbol = simpleMarkerSymbol;
            //var pEla = pMarkerElement as IElement;
            //pEla.Geometry = currentFeature.Shape;
            //var pActiveView = _mapCtrl.ActiveView;
            //var pGraphicsContainer = _mapCtrl.Map as IGraphicsContainer;
            //pGraphicsContainer.AddElement(pEla, 0);
            //pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, _mapCtrl.ActiveView.Extent);
            break;
        case esriGeometryType.esriGeometryPolyline:
            ILineElement pLineElement = new LineElementClass();
            pLineElement.Symbol = simpleLineSymbol;
            var pEla1 = pLineElement as IElement;
            pEla1.Geometry = currentFeature.Shape;
            var pActiveView1 = _mapCtrl.ActiveView;
            var pGraphicsContainer1 = _mapCtrl.Map as IGraphicsContainer;
            pGraphicsContainer1.AddElement(pEla1, );
            pActiveView1.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, _mapCtrl.ActiveView.Extent);
            break;
        case esriGeometryType.esriGeometryPolygon:
            IPolygonElement pPolygonElement = new PolygonElementClass { Symbol = simpleFillSymbol };
            var pEla2 = pPolygonElement as IElement;
            pEla2.Geometry = currentFeature.Shape;
            var pActiveView2 = _mapCtrl.ActiveView;
            var pGraphicsContainer2 = _mapCtrl.Map as IGraphicsContainer;
            pGraphicsContainer2.AddElement(pEla2, );
            pActiveView2.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, _mapCtrl.ActiveView.Extent);
            break;
    }
    //显示节点
    //step1:创建节点符号
    ISimpleMarkerSymbol pVertexMarkerSymbol = new SimpleMarkerSymbolClass();
    pVertexMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSSquare;
    pVertexMarkerSymbol.Size = ;
    pVertexMarkerSymbol.Angle = ;
    IRgbColor rgbVertex = new RgbColorClass();
    rgbVertex.Green = ;
    pVertexMarkerSymbol.Color = rgbVertex;
    ISimpleMarkerSymbol pEndPointMarkerSymbol = new SimpleMarkerSymbol();
    pEndPointMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSSquare;
    pEndPointMarkerSymbol.Size = ;
    pEndPointMarkerSymbol.Angle = ;
    IRgbColor rgbEndPoint = new RgbColorClass();
    rgbEndPoint.Red = ;
    pEndPointMarkerSymbol.Color = rgbEndPoint;  

    //判D断要素的类型
    if (currentFeature.Shape.GeometryType == esriGeometryType.esriGeometryPolyline)
    {
        IGeometryCollection pGeoColl;
        ISegmentCollection pSegColl;
        ISegment pSegment;
        IPath path;
        IPointCollection pEndPointCol;
        IMultipoint pEndPoints;
        IPoint pEndPoint;
        pEndPoints = new MultipointClass();
        pEndPointCol = pEndPoints as IPointCollection;
        pGeoColl = currentFeature.Shape as IGeometryCollection;
        for (int i = ; i < pGeoColl.GeometryCount; i++)
        {
            pSegColl = pGeoColl.get_Geometry(i) as ISegmentCollection;
            path = pGeoColl.get_Geometry(i) as IPath;
            pEndPointCol.AddPoint(path.FromPoint);
            pEndPointCol.AddPoint(path.ToPoint);  

            for (int j = ; j < pSegColl.SegmentCount; j++)
            {
                pSegment = pSegColl.get_Segment(j);
                //show vertex
                AddPointSymbolToMap(pSegment.FromPoint, pVertexMarkerSymbol);
                AddPointSymbolToMap(pSegment.ToPoint, pVertexMarkerSymbol);
            }
        }
        //show endpoint
        for (int k = ; k < pEndPointCol.PointCount; k++)
        {
            pEndPoint = pEndPointCol.get_Point(k);
            AddPointSymbolToMap(pEndPoint, pEndPointMarkerSymbol);
        }  

    }
    else if (currentFeature.Shape.GeometryType == esriGeometryType.esriGeometryPoint)
    {
        IPoint pEndPoint;
        pEndPoint = currentFeature.Shape as IPoint;
        AddPointSymbolToMap(pEndPoint, pEndPointMarkerSymbol);
    }
}  

2、添加节点

OnMouseDown事件：
IProximityOperator proximityOperator = ucDrawPanel.currentFeature.Shape as IProximityOperator;
ptInsert = proximityOperator.ReturnNearestPoint(pPt, esriSegmentExtension.esriNoExtension);  

//step1: 创建节点符号
ISimpleMarkerSymbol pVertexMarkerSymbol = new SimpleMarkerSymbolClass();
pVertexMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSSquare;
pVertexMarkerSymbol.Size = ;
pVertexMarkerSymbol.Angle = ;
IRgbColor rgbVertex = new RgbColorClass();
rgbVertex.Green = ;
pVertexMarkerSymbol.Color = rgbVertex;
//step2: 显示在地图上
IMarkerElement pMarkerElement = new MarkerElementClass();
pMarkerElement.Symbol = pVertexMarkerSymbol;
var pEla = pMarkerElement as IElement;
pEla.Geometry = ptInsert as IGeometry;
pGraphicContainer.AddElement(pEla, );
pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, pActiveView.Extent);  

OnMouseUp事件，添加一个节点，但不打断线：
// 注意：如果第三个参数createPart设为true，线会被打断，不可取
//线?splitAtPoint
bool isSplitted;
int newPartIndex;
int newSegmentIndex;
IPolyline polyline = ucDrawPanel.currentFeature.Shape as IPolyline;
//插入一点，newSegmentIndex记录插入点的相对线的节点位置
polyline.SplitAtPoint(ptInsert, true, false, out isSplitted, out newPartIndex, out newSegmentIndex);
ucDrawPanel.currentFeature.Store();  

3、删除节点

OnMouseDown事件：
//step1:获取预删除的节点
IPolyline pPolyline;
IHitTest pHitTest;
bool BoolHitTest;
double dist = ;
double DbHitDis = ;
int LngPrtIdx = ;
bool BoolHitRt = false;
hitElement = getElement(pPt, esriGeometryType.esriGeometryPolyline);
if (hitElement != null)
{
    pPolyline = hitElement.Geometry as IPolyline;
    pHitTest = pPolyline as IHitTest;
    ptDelete = new PointClass();
    BoolHitTest = pHitTest.HitTest(pPt, pActiveView.Extent.Width / ,
                                   esriGeometryHitPartType.esriGeometryPartVertex, ptDelete,                                                           ref DbHitDis, ref LngPrtIdx, ref indexDelete, ref BoolHitRt);
    // pHitTest.HitTest(pPt, pActiveView.Extent.Width / 100,esriGeometryHitPartType.esriGeometryPartVertex, ptDelete,ref DbHitDis, ref LngPrtIdx, ref LngSegIdx, ref BoolHitRt);  

    if (BoolHitTest)
    {
        //step2:高?亮显示，符号黑色边框镂空填充
        ISimpleMarkerSymbol pVertexMarkerSymbol = new SimpleMarkerSymbolClass();
        pVertexMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSDiamond;
        pVertexMarkerSymbol.Size = ;
        pVertexMarkerSymbol.Angle = ;
        IRgbColor rgbVertex = new RgbColorClass();
        rgbVertex.Red = ;
        rgbVertex.Blue = ;
        rgbVertex.Green = ;
        pVertexMarkerSymbol.Color = rgbVertex;  

        IMarkerElement pMarkerElement = new MarkerElementClass();
        pMarkerElement.Symbol = pVertexMarkerSymbol;
        var pEla = pMarkerElement as IElement;
        pEla.Geometry = ptDelete as IGeometry;
        pGraphicContainer.AddElement(pEla, );
        pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, pActiveView.Extent);
    }
}  

    OnMouseUp事件，删除节点：
    IPointCollection pointCollection = ucDrawPanel.currentFeature.Shape as IPointCollection;
    pointCollection.RemovePoints(indexDelete, );
    IPolyline polylineNew = pointCollection as IPolyline;
    StoreFeatureGeometry(ucDrawPanel.currentFeature, polylineNew);
    保存图形要素：
         private bool StoreFeatureGeometry(IFeature pFeature, IGeometry pIGeometry)
{
    try
    {
        var pFeatureClass = pFeature.Class as IFeatureClass;
        var pDataset = pFeatureClass as IDataset;
        IWorkspace pWorkspace = pDataset.Workspace;
        var pWorkspaceEdit = pWorkspace as IWorkspaceEdit;  

        pWorkspaceEdit.StartEditing(false);
        pWorkspaceEdit.StartEditOperation();
        pFeature.Shape = pIGeometry;
        pFeature.Store();
        pWorkspaceEdit.StopEditOperation();
        pWorkspaceEdit.StopEditing(true);
        return true;
    }
    catch (Exception ex)
    {
        return false;
    }
}  

4、打断线

关键字：Split。
OnMouseDown事件：
IProximityOperator proximityOperator = ucDrawPanel.currentFeature.Shape as IProximityOperator;
ptSplit = proximityOperator.ReturnNearestPoint(pPt, esriSegmentExtension.esriNoExtension);  

//step1:创建节点符号
ISimpleMarkerSymbol pVertexMarkerSymbol = new SimpleMarkerSymbolClass();
pVertexMarkerSymbol.Style = esriSimpleMarkerStyle.esriSMSSquare;
pVertexMarkerSymbol.Size = ;
pVertexMarkerSymbol.Angle = ;
IRgbColor rgbVertex = new RgbColorClass();
rgbVertex.Red = ;
pVertexMarkerSymbol.Color = rgbVertex;
//step2:显示在地图上
IMarkerElement pMarkerElement = new MarkerElementClass();
pMarkerElement.Symbol = pVertexMarkerSymbol;
var pEla = pMarkerElement as IElement;
pEla.Geometry = ptSplit as IGeometry;
pGraphicContainer.AddElement(pEla, );
pActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, pActiveView.Extent);  

OnMouseUp事件打断线：
IFeatureEdit featureEdit = ucDrawPanel.currentFeature as IFeatureEdit;
ISet newFeaturesSet = featureEdit.Split(ptSplit);
newFeaturesSet.Reset();
IFeature feature = newFeaturesSet.Next() as IFeature;         

5、合并线

首先判断预合并的两条线拓扑关系，是否邻接关系；满足条件可以用关键字Merge实现，或者自定义方法，重新获取点的集合IPointCollection创建多线。