AE用线来分割线面（C#2010+AE10.0… .

希望指正。

在 ITools 类中，部分方法如下：

public override void OnMouseDown(int Button, int Shift, int X, int Y)

{

if (Button != 1)

return;

#region……分割面

//根据已选择的要分割的要素的类型绘制分割线

if (pFeatureLayer.FeatureClass.ShapeType==esriGeometryType.esriGeometryPolygon)

{//分割线的样式

IScreenDisplay pScreenDisplay = m_hookHelper.ActiveView.ScreenDisplay;

ISimpleLineSymbol pLineSymbol = new SimpleLineSymbolClass();

IRgbColor pRgbColor = new RgbColorClass();

pRgbColor.Red = 255;

pLineSymbol.Color = pRgbColor;

IRubberBand pRubberBand = new RubberLineClass();

IPolyline pPolyline = (IPolyline)pRubberBand.TrackNew(pScreenDisplay, (ISymbol)pLineSymbol);

pScreenDisplay.StartDrawing(pScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache);

pScreenDisplay.SetSymbol((ISymbol)pLineSymbol);

pScreenDisplay.DrawPolyline(pPolyline);

pScreenDisplay.FinishDrawing();

//清理将被分割的要素

ITopologicalOperator pTopoOpo;

pTopoOpo = pPolyline as ITopologicalOperator;

pTopoOpo.Simplify();//确保几何体的拓扑正确

m_engineEditor.StartOperation();

//分割方法

SplitPolygon(pSelectionSet, pPolyline);

ReBackStates();//刷新返回修改工具

m_hookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, m_hookHelper.ActiveView.Extent);

}

#endregion

#region……鼠标画线分割线

//根据分割要素的类型绘制分割线

if (pFeatureLayer.FeatureClass.ShapeType == esriGeometryType.esriGeometryPolyline)

{

IScreenDisplay pScreenDisplay = m_hookHelper.ActiveView.ScreenDisplay;

ISimpleLineSymbol pLineSymbol = new SimpleLineSymbolClass();

IRgbColor pRgbColor = new RgbColorClass();

pRgbColor.Red = 255;

pLineSymbol.Color = pRgbColor;

IRubberBand pRubberBand = new RubberLineClass();

IPolyline pPolyline = (IPolyline)pRubberBand.TrackNew(pScreenDisplay, (ISymbol)pLineSymbol);

pScreenDisplay.StartDrawing(pScreenDisplay.hDC, (short)esriScreenCache.esriNoScreenCache);

pScreenDisplay.SetSymbol((ISymbol)pLineSymbol);

pScreenDisplay.DrawPolyline(pPolyline);

pScreenDisplay.FinishDrawing();

m_engineEditor.StartOperation();//开启编辑

//分割方法

SplitPolyline(pSelectionSet, pPolyline);

ReBackStates();

m_hookHelper.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGeography, null, m_hookHelper.ActiveView.Extent);

}

#endregion

m_engineEditor.StopOperation("ControlToolsEditing_CreateNewFeatureTask");

}

//分割面

public void SplitPolygon(ISelectionSet pSelectionSet, IGeometry pGeometry)

{

//使用空间过滤器来获得将要与线或点进行分割的要素类

IFeatureCursor pFeatCursor;

ICursor pCursor;

ISpatialFilter pSpatialFilter;

pSpatialFilter = new SpatialFilterClass();

pSpatialFilter.Geometry = pGeometry;

if (pGeometry.GeometryType == esriGeometryType.esriGeometryPolyline)//.esriGeometryPoint)

{

pSpatialFilter.SpatialRel = esriSpatialRelEnum.esriSpatialRelCrosses;//空间关系

}

pSelectionSet.Search(pSpatialFilter, true, out pCursor);

pFeatCursor = pCursor as IFeatureCursor;

//清理将被分割的要素

ITopologicalOperator pTopoOpo;

pTopoOpo = pGeometry as ITopologicalOperator;

pTopoOpo.Simplify();//确保几何体的拓扑正确

IFeature pFeature;

pFeature = pFeatCursor.NextFeature();

if (pFeature == null) return;

while (pFeature != null)

{

IFeatureEdit pFeatureEdit;

pFeatureEdit = pFeature as IFeatureEdit;

ISet pSet;

pSet = pFeatureEdit.Split(pGeometry);//直接用线分割

for (int setCount = 0; setCount < pSet.Count; setCount++)

{

pFeature = pSet.Next() as IFeature;

//featureSelection.SelectionSet.Add(pFeature.OID);

}

pFeature = pFeatCursor.NextFeature();

}

MessageBox.Show("面分割完毕！继续选择以分割！");

}

//分割线，线要素不能用线来分割，得用点来。所以要将分割线与被分割线求交叉点

public void SplitPolyline(ISelectionSet pSelectionSet, IGeometry pGeometry)

{

IFeatureClass featureClass=pFeatureLayer.FeatureClass;

IEnumIDs enumIDs = pSelectionSet.IDs;

int id = enumIDs.Next();

while(id!=-1)

{

pFeature = featureClass.GetFeature(id);

IGeometry pGeo = pFeature.ShapeCopy;

//由于在拓扑是需要空间参考一致，所以要将空间参考坐标设置一下。

pGeo.SpatialReference = pGeometry.SpatialReference;

ITopologicalOperator pTopoOpo = pGeo as ITopologicalOperator;

//Intersect（）方法求出来的是MultiPoint，而不是单点

IPointCollection pPCol = pTopoOpo.Intersect(pGeometry, esriGeometryDimension.esriGeometry0Dimension) as IPointCollection;

pTopoOpo.Simplify();

if (pPCol == null)//如果没有相交的，那么点集就为空。

return;

if (pPCol.PointCount == 0)//如果选择的线有一些没有与分割线相交，那么PointCount为0，但是0并不是null。

{

id = enumIDs.Next();//那么就Next（），让他进入下一个回合吧

continue;

}

IFeatureEdit pFeatureEdit;

pFeatureEdit = pFeature as IFeatureEdit;

ISet pSet;

pSet = pFeatureEdit.Split(pPCol.get_Point(0));

pSet.Reset();

//这一步进入分割大赛，其实分割为两个部分，当然要是只是分割单个要素的话就用不着里面那一层嵌套循环了。

for (int setCount = 0; setCount < pSet.Count; setCount++)

{

pFeature = pSet.Next() as IFeature;

if (pFeature == null) return;

for (int i = 1; i < pPCol.PointCount; i++)

{

try

{

pFeatureEdit = pFeature as IFeatureEdit;

IPoint pPoint = pPCol.get_Point(i);

pSet = pFeatureEdit.Split(pPoint);//这里新产生的线要素，可能与下一个交点进行分割，所以要重新获取以便进行下一次分割

pSet.Reset();

pPCol.RemovePoints(i, 1);//为了少循环一次，用了一个点就从点集中移除它，因为两线相交肯定没有二心。

break;//打断，这一步是迫不得已的，因为懒得去想另一部分。当然这样的话有个问题：如3点分线应该是4段，但如果这点刚好是中间的点，那么就会丢掉他前面或者后面的一个分割点，如此的话就变成2点分线为3段了；而且画的分割折线与被分割线交点越多丢失的就越多。主要原因是MultiPoint撞到IPointCollection中后顺序并不是画线时候的交叉顺序。怎么办呢？

}

catch

{

continue;

}

}

}

id = enumIDs.Next();

}

MessageBox.Show("线分割完毕！继续选择以分割！");

}

private void ReBackStates()

{

//清空选择集

ICommand pCommand = new ControlsClearSelectionCommandClass();

pCommand.OnCreate(pMapControl.Object);

pCommand.OnClick();

pCommand = new ControlsEditingEditToolClass();

pCommand.OnCreate(pMapControl.Object);

pMapControl.CurrentTool = pCommand as ITool;

}

来自：http://blog.csdn.net/hong_taizi/article/details/10161557