切换页面卡机 - 专家坐堂 - Foxtable(狐表) - 新一代数据库软件，完美融合Access、Foxpro、Excel、vb.net之优势，人人都能掌握的快速软件开发工具!

请老师看一下这段代码有问题吗？这段代码我删掉后切换这个页面就不卡机。否则就卡机。请老师指教

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")

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

Dim Val1 As Double = e.DataTable.Compute("Sum(现送数量)",Filter)

dr("已送数量") = Val1 - dr("现送数量")

End If

End Select

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