主题：自动编号

怎么不递增呢 ？？？？？？

If e.DataCol.Name = "排产日期" Then
    If e.DataRow.IsNull("排产日期") Then
        e.DataRow("排产单号") = Nothing
    Else
        Dim d As Date = e.DataRow("排产日期")
        Dim y As Integer = d.Year
        Dim m As Integer = d.Month
        Dim Days As Integer = Date.DaysInMonth(y,m)
        Dim fd As Date = New Date(y,m,1) '获得该月的第一天
        Dim ld As Date = New Date(y,m,Days) '获得该月的最后一天
        Dim bh As String = "P" & Format(d,"yy-MM") '生成排产单号的前6位,2位年,2位月.
        If e.DataRow("排产单号").StartsWith(bh) = False '如果排产单号的前6位不符
            Dim max As String
            Dim idx As Integer
            max = e.DataTable.Compute("Max(排产单号)","排产日期 >= #" & fd & "# And 排产日期 <= #" & ld & "# And [_Identify] <> " & e.DataRow("_Identify")) '取得该月的最大排产单号
            If max > "" Then '如果存在最大排产单号
                idx = CInt(max.Substring(6,2)) + 1 '获得最大排产单号的后三位顺序号,并加1
            Else
                idx = 1 '否则顺序号等于1
            End If
            e.DataRow("排产单号") = bh & Format(idx,"00")
        End If
    End If
End If

都不变，改红色得，其它的，你换一下列名

Select e.DataCol.Name
    Case "订货日期","厂家编号"
        If e.DataRow.IsNull("订货日期") OrElse e.DataRow.IsNull("厂家编号") Then
            e.DataRow("采购单号") = Nothing
        Else
            Dim d As Date = e.DataRow("订货日期")
            Dim bh As String = "SM-" & e.DataRow("厂家编号") & "" & Format(d,"yy-MM") & "" '生成编号的前缀
           
            Dim max As String
            Dim idx As Integer
            Dim flt As String
            flt = "采购单号 like '" & bh & "%' And [_Identify] <> " & e.DataRow("_Identify")
            max = e.DataTable.Compute("Max(采购单号)",flt) '取得该月的相同厂家编号的最大采购单号
            If max > "" Then '如果存在最大采购单号
                idx = CInt(max.Substring(bh.Length,2)) + 1 '获得最大采购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("采购单号") = bh & Format(idx,"00")
        End If
End Select