If e.DataCol.Name = "发货日期" Then
If e.DataRow.IsNull("发货日期") Then
e.DataRow("编号") = Nothing
Else
Dim d As Date = e.DataRow("发货日期")
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 = Format(d,"yyyyMM") '生成编号的前6位,4位年,2位月.
If e.DataRow("编号").StartsWith(bh) = False '如果编号的前6位不符
Dim max As String
Dim idx As Integer
max = e.DataTable.Compute("Max(编号)","发货日期 >= #" & fd & "# And 发货日期 <= #" & ld & "# And [_Identify] <> " & e.DataRow("_Identify"))
If max > "" Then '如果存在最大编号
idx = CInt(max.Substring(7,3)) + 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("编号") = bh & "-" & Format(idx,"000")
End If
End If
End If
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Post By：2016/7/19 16:08:00 [只看该作者]
