Feature相关程序：创建一个feature并加载到地图中

2015-06-11 12:01:54 访问(1447) 赞(0) 踩(0)

public static void MapInfo_Mapping_HowDoICreateFeatureAddToMap(MapControl mapControl1, MIConnection connection, double x, double y) {
 Map map = mapControl1.Map;
            //使用wldcty25作为一个模板
            Table table = MapInfo.Engine.Session.Current.Catalog.GetTable("wldcty25");
            //创建一个临时表并添加一个featurelayer
            CoordSys coordSys = map.GetDisplayCoordSys();
            TableInfoMemTable tableInfo = new TableInfoMemTable("temp");
            tableInfo.Temporary = true;
            // 添加一个 geometry column
            Column column;
           
            column = new GeometryColumn(coordSys);
            column.Alias = "MI_Geometry";
            column.DataType = MIDbType.FeatureGeometry;
            tableInfo.Columns.Add(column);
            // 添加样式 column
            column = new Column();
            column.Alias = "MI_Style";
            column.DataType = MIDbType.Style;
            tableInfo.Columns.Add(column);
            Table pointTable = Session.Current.Catalog.CreateTable(tableInfo);
            // 设置location并显示点
            FeatureGeometry geometry = new MapInfo.Geometry.Point(coordSys, x, y);
            SimpleVectorPointStyle vStyle = new SimpleVectorPointStyle
                (37, System.Drawing.Color.Red, 14); //矢量mapinfo符号
            CompositeStyle cStyle = new MapInfo.Styles.CompositeStyle(vStyle);
            //更新
            MICommand cmd = connection.CreateCommand();
            cmd.Parameters.Add("geometry", MIDbType.FeatureGeometry);
            cmd.Parameters.Add("style", MIDbType.Style);
            cmd.CommandText = "Insert Into temp (MI_Geometry,MI_Style) values (geometry,style)";
            cmd.Prepare();
            cmd.Parameters[0].Value = geometry;
            cmd.Parameters[1].Value = cStyle;
            int nchanged = cmd.ExecuteNonQuery();
            cmd.Dispose();
            //把表加载到地图
            map.Layers.Add(new MapInfo.Mapping.FeatureLayer(pointTable));