主题：请前辈指点

先帮你顶一下。

'查询不重复值的ID号
Dim drs As List(Of DataRow) = DataTables("订单处理").Select("", "取货商品名列")
Dim idxs As New List(Of Integer)
idxs.Add(drs(0)("_Identify"))
For i As Integer = 1 To drs.Count - 1
    If drs(i)("取货商品名列") <> drs(i-1)("取货商品名列") Then
        idxs.Add(drs(i)("_Identify"))
    End If
Next
Dim filter As String = ""
For Each d As Integer In idxs
    filter = filter & d & ","
Next
filter = filter.Trim(",")

'最后定义筛选条件
ex.Filter = "_Identify in (" & filter & ")"