ArcGIS Engine 线段绘制研究

//ArcGIS Engine 线段绘制研究
//基本步骤
//构建形状
//创建 IPoint
IPoint m_Point = new PointClass();
m_Point.PutCoords(x, y);

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

//创建 IPolyline
IPolyline m_Polyline = new PolylineClass();
m_Polyline = m_PointCollection as IPolyline;

//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
//创建 ISimpleLineSymbol
ISimpleLineSymbol m_SimpleLineSymbol = new SimpleLineSymbolClass();

//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);

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);  
        }