Select Case e.DataCol.Name
Case "发货批号","现送数量","送货日期"
Dim drs As List(of DataRow)
Dim Filter As String
Filter = "[送货日期] >= #" & e.DataRow("送货日期") & "# And [发货批号] = '" & e.DataRow("发货批号") & "'"
drs = e.DataTable.Select(Filter)
For Each dr As DataRow In drs
Filter = "iif([送货日期] < #" & dr("送货日期") & "#, [送货日期] < #" & dr("送货日期") & "# And [发货批号] = '" & dr("发货批号") & "', [送货日期] = #" & dr("送货日期") & "# and _sortkey <= " & dr("_sortkey") & " And [发货批号] = '" & dr("发货批号") & "')"
Dim Val1 As Double = e.DataTable.Compute("Sum(现送数量)",Filter)
dr("已送数量") = Val1 - dr("现送数量")
Next
If e.DataCol.Name = "发货批号" AndAlso e.OldValue IsNot Nothing AndAlso e.OldValue <> e.NewValue Then
Filter = "[送货日期] > #" & e.DataRow("送货日期") & "# And [发货批号] = '" & e.OldValue & "'"
drs = e.DataTable.Select(Filter)
For Each dr As DataRow In drs
Filter = "iif([送货日期] < #" & dr("送货日期") & "#, [送货日期] < #" & dr("送货日期") & "# And [发货批号] = '" & dr("发货批号") & "', [送货日期] = #" & dr("送货日期") & "# and _sortkey <= " & dr("_sortkey") & " And [发货批号] = '" & dr("发货批号") & "')"
Dim Val1 As Double = e.DataTable.Compute("Sum(现送数量)",Filter)
dr("已送数量") = Val1 - dr("现送数量")
Next
End If
End Select