ArcEngine C# 二次开发 PolyLine 多次打断操作
内容导读
互联网集市收集整理的这篇技术教程文章主要介绍了ArcEngine C# 二次开发 PolyLine 多次打断操作，小编现在分享给大家，供广大互联网技能从业者学习和参考。文章包含2742字，纯文字阅读大概需要4分钟。
内容图文
一条线（Polyline）被另外一条线多次（Polyline）切割，也就是说打断的点有多个，而AE中的IFeatureEdit.Split()只能是一个点一个点的处理，这样就涉及到了循环操作，现在将本人自己写具体的操作函数附上，大家一同学习。
1
public
void
LineSplit(IFeature feature, IGeometry other)
2
{
3
try
4
{
5 ITopologicalOperator shape = feature.Shape as ITopologicalOperator;
6 IPoint point = new PointClass();
7 IGeometry geometry2 = shape.Intersect(other, esriGeometryDimension.esriGeometry0Dimension);
8if (!geometry2.IsEmpty)
9 {
10 IPointCollection points2 = geometry2 as IPointCollection;
11for(int i = 0; i < points2.PointCount; i++)
12 {
13 point = points2.get_Point(i);
14 ISet set = (feature as IFeatureEdit).Split(point);
15set.Reset();
16for (IFeature feature2 = set.Next() as IFeature; feature2 != null; feature2 = set.Next() as IFeature)
17 {
18if (!IsSplitOk(feature2,other))
19 {
20 feature = feature2;
21 }
22else 23 {
24 ISimpleLineSymbol symbol = new SimpleLineSymbolClass();
25 IRgbColor color = new RgbColorClass
26 {
27 RGB = Color.FromArgb(0xff, 0, 0).ToArgb()
28 };
29 symbol.Color = color;
30 symbol.Width = 2.0;
31this.pMapControl.FlashShape(feature2.Shape, 1, 450, symbol as ISymbol);
32 pMapControl.ActiveView.FocusMap.SelectFeature(pCurrentLayer, feature2);
33 }
34 35 }
36 37 }
38 }
39 }
40catch (Exception)
41 {
42return ;
43 }
44 45 }
46 47publicbool IsSplitOk(IFeature feature, IGeometry splitLine)
48 {
49bool ok = false;
50try 51 {
52 ITopologicalOperator shape = feature.Shape as ITopologicalOperator;
53 IGeometry geometry = shape.Intersect(splitLine, esriGeometryDimension.esriGeometry0Dimension);
54if (!geometry.IsEmpty)
55 {
56 IPointCollection points = geometry as IPointCollection;
57if(points.PointCount==1)
58 {
59 IPoint point = points.get_Point(0);
60if (IsLineStartEndPoint(feature,point))
61 {
62 ok = true;
63 }
64 65 }
66elseif (points.PointCount == 2)
67 {
68 IPoint point1 = points.get_Point(0);
69 IPoint point2 = points.get_Point(1);
70if (IsLineStartEndPoint(feature, point1) && IsLineStartEndPoint(feature, point2))
71 {
72 ok = true;
73 }
74 }
75 76 }
77return ok;
78 }
79catch (Exception)
80 {
81returnfalse;
82 }
83 }
84 85 86publicbool IsLineStartEndPoint(IFeature feature,IPoint point)
87 {
88bool yes = false;
89try 90 {
91 IPolyline line = feature.Shape as IPolyline;
92double len = line.Length;
93 IPoint pStart = line.FromPoint;
94if (Math.Abs(pStart.X - point.X) < 0.1 && Math.Abs(pStart.Y - point.Y) < 0.1)
95 {
96 yes = true;
97 }
98else 99 {
100 IPoint pEnd = line.ToPoint;
101if (Math.Abs(pEnd.X - point.X) < 0.1 && Math.Abs(pEnd.Y - point.Y) < 0.1)
102 {
103 yes = true;
104 }
105 }
106return yes;
107 }
108catch (Exception)
109 {
110returnfalse;
111 }
112 }
原文：http://www.cnblogs.com/shizhenkun/p/5556478.html
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