MSDN:Note If you use a single table to create an aggregate, there would be no group-by functionality. Instead, all rows would display the same value in the column. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfSystemDataDataColumnClassExpressionTopic.asp
你有試成功嗎?拿個 sample 出來.
可以这样,设dataview1中有字段city
则dataview1.rowfilter("city='abc'");
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/cpref/html/frlrfSystemDataDataColumnClassExpressionTopic.asp
和group by没有关系。