If e.DataRow("mono").StartsWith(bh) = False '如果编号的前6位不符
Dim max As String
Dim idx As Integer
max = e.DataTable.sqlCompute("Max(mono)","modate >= #" & fd & "# And modate <= #" & ld & "# And [num] <> " & e.DataRow("num")) '取得该月的最大编号
If max > "" Then '如果存在最大编号
idx = CInt(max.Substring(7,4)) + 1 '获得最大编号的后三位顺序号,并加1
Else
idx = 1 '否则顺序号等于1
End If
e.DataRow("mono") = bh & "-" & Format(idx,"0000") & "-" & u
e.DataRow.save
End If