主题：用日期列做目录树 怎么去掉时间部分?

Dim dt5 As DataTable

Dim cmd As NEW SQLCommand

cmd.C

cmd.CommandText = "select DISTINCT  {生产统计表}.生产时间, from {生产统计表} "

dt5 = cmd.ExecuteReader()

Tables("月度生产汇总_Table1").DataSource =dt5

Dim tr As WinForm.TreeView = e.Form.Controls("TreeView1")

'tr.BuildT'ee("dt5",Format(生产时间,"yyyy-MM") '2008-12-31

tr.CreateTree( dt5,"生产时间","-")

用日期列做目录树 怎么去掉时间部分?

我只要时间的年月部分