ArcGIS Engine 中线段的绘制方法

ArcGIS Engine中线段的绘制

基本步骤

构建形状

1. 创建 IPoint
IPoint m_Point = new PointClass();
m_Point.PutCoords(x, y);

2. 创建 IPointCollection
IPointCollection m_PointCollection = new PolylineClass();
m_PointCollection.AddPoint(m_Point, ref Type.Missing, refType.Missing);

3. 创建 IPolyline
IPolyline m_Polyline = new PolylineClass();
m_Polyline = m_PointCollection as IPolyline;

4. 创建 IElement
// Element 不能实例化，需要用其派生类实例化
IElement m_Element = m_SimpleLineSymbol as IElement;
m_Element.Geometry = m_Polyline;

设置形状样式
1. 创建 ISimpleLineSymbol
ISimpleLineSymbol m_SimpleLineSymbol = newSimpleLineSymbolClass();

2. 创建 ILineElement
ILineElement m_LineElement = new LineElementClass();
m_LineElement.Symbol = m_SimpleLineSymbol;

加载到地图
IMap m_Map = axMapControl1.Map;
IActiveView m_ActiveView = m_Map as IActiveView;
IGraphicsContainer m_Container = m_Map as IGraphicsContainer;

m_Container.AddElement(m_Element, 0);

m_Active.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null,null);

-----------------------------------------------------------------------------------------------------------

其他方法

 

[csharp] viewplaincopyprint?

1. private void DrawLine()  
2.         {  
3.             ILineElement pLineElement;  
4.             IElement pLElement;  
5.   
6.             IPolyline pLine;  
7.   
8.             RgbColor pColor = new RgbColor();  
9.             pColor.Red = 0;  
10.             pColor.Green = 0;  
11.             pColor.Blue = 255;  
12.               
13.             ISimpleLineSymbol pSimpleLineSymbol = new SimpleLineSymbolClass();  
14.             pSimpleLineSymbol.Color = pColor;  
15.             pSimpleLineSymbol.Width = 5;  
16.   
17.             pLineElement = new LineElementClass();  
18.             pLineElement.Symbol = pSimpleLineSymbol;  
19.   
20.             pLElement = pLineElement as IElement;  
21.   
22.             IRubberBand pRubberBand;  
23.             pRubberBand = new RubberLineClass();  
24.             pLine = pRubberBand.TrackNew(axMapControl1.ActiveView.ScreenDisplay, null) as IPolyline;  
25.   
26.             pLElement.Geometry = pLine;  
27.   
28.             IGraphicsContainer pGraphicsContainer;  
29.             pGraphicsContainer = axMapControl1.ActiveView as IGraphicsContainer;//把地图的当前view作为图片的容器  
30.               
31.             pGraphicsContainer.AddElement(pLElement, 0);//把刚刚的element转到容器上  
32.             axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, null, null);  
33.         } 

复制去Google翻译翻译结果