MapXtreme2004常用代码

1、加载地图，选择图层
if(!Page.IsPostBack)
{
MapControl1.Map.Clear();
MapControl1.Map.Load(MapLoader.CreateFromFile(Server.MapPath("/mymap")+"\\map\\xy.gst"));
MapControl1.SelectableLayers.Clear();
MapControl1.SelectableLayers.Add("o地名p");
}
可以把图层当成一个结果集
(_tempTable as IFeatureCollection).Clear();
2、遍历所有结果集
Selection sl =MapInfo.Engine.Session.Current.Selections.DefaultSelection;
IResultSetFeatureCollection fc=sl[0];
IFeatureEnumerator fn=fc.GetFeatureEnumerator();
ListBox1.Items.Clear();
while(fn.MoveNext())
if(fn.Current.Geometry.GetType().ToString()=="MapInfo.Geometry.LegacyText")
ListBox1.Items.Add(((MapInfo.Geometry.LegacyText)fn.Current.Geometry).Caption);
3、根据关键字获得（第一个）图元
MapInfo.Engine.Session.Current.Catalog.SearchForFeature("Layer1",MapInfo.Data.SearchInfoFactory.SearchWhere("MI_Key='"+strKey+"'") )