Vb.net 过滤网格视图中的数据以查看最新数据

我有一张桌子

____________________________________________________ |Name | DtFrom | DtTo | City | Designation | ____________________________________________________ | Z | 01/01/02 | 01/01/03 |Delhi | ADM | _____________________________________________________ | Z | 02/01/03 | 01/01/04 |Mumbai| ADM | _____________________________________________________ | Z | 02/01/04 | 01/01/05 |Delhi | DM | _____________________________________________________ | Z | 02/01/05 | 01/01/06 |Delhi | DM | _____________________________________________________ | Z | 02/01/06 | 01/01/07 |Mumbai| DM | _____________________________________________________ | Z | 05/01/07 | 12/12/10 |Mumbai| CDM | 我正在vb.net中使用gridview 请帮助我，因为desc查询前2名订单无法解决此问题。

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提前非常感谢。

再次按描述查询前2名订单，按asc查询订单。检查dtTodate是否为空，然后填写grdiview

         From----------To-----------City-----Designation

|  Z  | 02/01/06 | 01/01/07        |Mumbai|  DM      |
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|  Z  | 05/01/07 | 12/12/10        |Mumbai| CDM      |
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