主题：请教,在FOX如何实现表达式的列表项目?

Dim Customers As List(Of String)
Customers = DataTables("订单").GetUniqueValues("", "客户")
For Each Customer As String In Customers
    Output.Show(Customer)
Next

Dim Customers As List(Of String)
Customers = DataTables("订单").GetUniqueValues("[产品]= 'PD01' And [日期] > #6/1/1999#", "客户")
For i As Integer = 0 To Customers.Count - 1 '其实用For Each好一点，这里只是顺便提供遍历集合的另一种用法。
    Output.Show(Customers(i))
Next

'定义数组集合的时候，要在类型后加上括号，表示这是一个数组集合。
Dim Arys As List(Of String())
Arys = DataTables("订单").GetUniqueValues("", "客户","产品")
'注意循环变量是字符型数组，所以类型是String()，而不是String
For Each Ary As String() In Arys
    Output.Show(Ary(0) & "|" & Ary(1))
Next