Select e.DataCol.Name

    Case "办事处","报价人","报价时间"

        If e.DataRow.IsNull("报价人") OrElse e.DataRow.IsNull("办事处") OrElse e.DataRow.Isnull("报价时间") Then

            e.DataRow("报单号") = Nothing

        Else

            Dim d As Date = e.DataRow("报价时间")

            Dim bh As String = GetPy(e.DataRow("办事处"),True).ToUpper & "-" & GetPy(e.DataRow("报价人"),True).ToUpper & Format(d,"yyyyMMdd") & "-" \'生成报单号的前缀

            If e.DataRow("报单号").StartsWith(bh) = False \'如果单据报单号前缀不符

                Dim max As String

                Dim idx As Integer

                Dim flt As String

                flt = "办事处 = \'"& e.DataRow("办事处") & "\' and 报价人 = \'" & e.DataRow("报价人") & "\' And 报价时间 >= #" & d & "# And 报价时间 < #" & d.AddDays(1) & "# And [_Identify] <> " & e.DataRow("_Identify")

                max = e.DataTable.Compute("Max(报单号)",flt) \'取得该月的相同工程代码的最大单据报单号

                If max > "" Then \'如果存在最大单据报单号

                    idx = CInt(max.Substring(bh.length)) + 1 \'获得最大单据报单号的后四位顺序号,并加1

                Else

                    idx = 1 \'否则顺序号等于1

                End If

                e.DataRow("报单号") = bh & Format(idx,"000")

            End If

        End If