向图层中添加线段

向图层中添加线段和向图层中添加点是一样的，其本质都是向图层中添加一个图元，只是属于不同类型的图元。并且点和线段是可以在一个图存上共存的。代码示例如下：
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代码:
/// <summary>

/// 向图层中添加线段


/// 2008年8月6日

/// <param name="tempLayerTableName">表名</param>

/// <param name="tempLayerName">图层名</param>

/// <param name="startPoint">线段起点坐标</param>

/// <param name="endPoint">线段终点坐标</param>

/// </summary>

public static void AddPointToLayer(string tempLayerTableName, string tempLayerName, DPoint startPoint, DPoint endPoint)

{

MapInfo.Mapping.Map myMap = MapInfo.Engine.Session.Current.MapFactory[MapControl1.MapAlias];

//获取图层和表

FeatureLayer workLayer = (MapInfo.Mapping.FeatureLayer)myMap.Layers[tempLayerName];

MapInfo.Data.Table tblTemp = MapInfo.Engine.Session.Current.Catalog.GetTable(tempLayerTableName);

//创建线图元及其样式

FeatureGeometry pgLine = MultiCurve.CreateLine(workLayer.CoordSys, startPoint, endPoint);

MapInfo.Styles.SimpleLineStyle slsLine = new
MapInfo.Styles.SimpleLineStyle(new LineWidth(3, LineWidthUnit.Pixel),
2, System.Drawing.Color.OrangeRed);

MapInfo.Styles.CompositeStyle csLine = new MapInfo.Styles.CompositeStyle(slsLine);

MapInfo.Data.Feature ptLine = new MapInfo.Data.Feature(tblTemp.TableInfo.Columns);

ptPoint.Geometry = pgLine;

ptPoint.Style = csLine;



//将线图元加入图层

workLayer.Table.InsertFeature(ptLine);