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：

 

    /// <summary>
    /// 向图层中添加线段
    /// Design by Glacier
    /// 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);
    }