*在使用Extending ArcObjects开发方法时，一些变量的获得方法。
IActiveView
pActiveView = (m_application.Document as IMxDocument).ActivatedView;
IMap
pMap = (m_application.Document as IMxDocument).FocusMap;
绘制函数的调出方法：
(IActiveView as IActiveViewEvents_Event).AfterDraw += new IActiveViewEvents_AfterDrawEventHandler(Command1_AfterDraw);
*IFeature要素修改其属性值后必须IFeature.Store()才能在数据库中存储相应修改
*ITableSort对ISelectionSet中的数据按照属性进行排序(ISelectionSet可以通过IFeatureClass.Select()方法获得)
1 string strSortField = "CARID,TIME";//设置排序字段，这里意味着先利用CARID排序，然后在其结果基础上利用TIME排序 2 3 ITableSort pTableSort = new TableSort(); 4 pTableSort.SelectionSet = readSelectionSet;//排序数据源输入 5 pTableSort.Fields = strSortField;//排序字段源输入 6 pTableSort.set_Ascending(strSortField, true);//升序排列 7 pTableSort.Sort(null);//执行排序过程 8 9 IFeatureCursor readFeaCursor = pTableSort.Rows as IFeatureCursor;//提取排序后数据