向图层中添加点

在添加点之前先要在地图上创建一个临时图层，创建临时图层请参考《MapXtreme2005学习（1）：创建临时图层》。本示例中通过指定图层名，表名，点坐标在图层中添加一个点。代码如下：
复制内容到剪贴板
代码:
/// <summary>

/// 向图层中添加点


/// 2008年8月6日

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

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

/// <param name="dPoint">点坐标</param>

/// </summary>

public static void AddPointToLayer(string tempLayerTableName, string tempLayerName, DPoint dPoint)

{

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);

//创建点图元及其样式

FeatureGeometry pgPoint = new MapInfo.Geometry.Point(workLayer.CoordSys, dPoint);

MapInfo.Styles.SimpleVectorPointStyle spsPoint = new
MapInfo.Styles.SimpleVectorPointStyle(37, System.Drawing.Color.Red, 20);

MapInfo.Styles.CompositeStyle csPoint = new MapInfo.Styles.CompositeStyle(spsPoint);

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

ptPoint.Geometry = pgPoint;

ptPoint.Style = csPoint;

//将点图元加入图层

workLayer.Table.InsertFeature(ptPoint);

}