ArcGIS Engine 线段绘制-白红宇

转自

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, ref Type.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 = new SimpleLineSymbolClass();

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);

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其他方法

                               
private
void
DrawLine() 
{ 
                
ILineElement pLineElement; 
                
IElement pLElement; 
      
                
IPolyline pLine; 
      
                
RgbColor pColor = 
new
RgbColor(); 
                
pColor.Red = 0; 
                
pColor.Green = 0; 
                
pColor.Blue = 255; 
                  
                
ISimpleLineSymbol pSimpleLineSymbol = 
new
SimpleLineSymbolClass(); 
                
pSimpleLineSymbol.Color = pColor; 
                
pSimpleLineSymbol.Width = 5; 
      
                
pLineElement = 
new
LineElementClass(); 
                
pLineElement.Symbol = pSimpleLineSymbol; 
      
                
pLElement = pLineElement 
as
IElement; 
      
                
IRubberBand pRubberBand; 
                
pRubberBand = 
new
RubberLineClass(); 
                
pLine = pRubberBand.TrackNew(axMapControl1.ActiveView.ScreenDisplay, 
null
) 
as
IPolyline; 
      
                
pLElement.Geometry = pLine; 
      
                
IGraphicsContainer pGraphicsContainer; 
                
pGraphicsContainer = axMapControl1.ActiveView 
as
IGraphicsContainer;
//把地图的当前view作为图片的容器 
                  
                
pGraphicsContainer.AddElement(pLElement, 0);
//把刚刚的element转到容器上 
            
axMapControl1.ActiveView.PartialRefresh(esriViewDrawPhase.esriViewGraphics, 
null
, 
null
); 
}     
          
        

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本文转自wenglabs博客园博客，原文链接：http://www.cnblogs.com/arxive/p/6816945.html

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