For Each lx As String In DataTables("订单").GetValues("类型")
Dim max As Date
max = DataTables("订单").Compute("Max(订单日期)", "类型 = '" & lx & "'")
Dim t As TimeSpan = Date.Now - max
Dim d = math.Floor(t.TotalDays)
For i As Integer = 1 To d
Output.Show(lx & " " & max.AddDays(i))
Next
Next