＋设为首页 ＋添加到收藏夹
rt
Summary Rows in a DataGrid: A Comparison of Techniques
http://www.aspalliance.com/olson/articles/Summary.aspx
用DataTable计算后榜定！
同意cuike519，只是这样不能排序
http://msdn.microsoft.com/library/en-us/dndive/html/data01102002.asp?frame=true
