老师，麻烦纠正下代码
Select e.DataCol.Name
Case "日期"
If e.DataRow.IsNull("日期") Then
e.DataRow("请购单号") = Nothing
Else
Dim d As Date = e.DataRow("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 ="QG" & Format(d,"yyyyMM") '生成编号的前缀
If e.DataRow("请购单号").StartsWith(bh) = False '如果单据编号前缀不符
Dim max As String
Dim idx As Integer
Dim flt As String
flt = "'QG' And 日期 >= #" & fd & "# And 日期 <= #" & ld & "# And [_Identify] <> " & e.DataRow("_Identify")
max = e.DataTable.Compute("Max(请购单号)",flt) '取得该月的相同工程代码的最大单据编号
If max > "" Then '如果存在最大单据编号
idx = CInt(max.Substring(8,4)) + 1 '获得最大单据编号的后四位顺序号,并加1
Else
idx = 1 '否则顺序号等于1
End If
e.DataRow("请购单号") = bh & Format(idx,"0000")
End If
End If
End Select
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Post By：2018/5/21 13:21:00 [只看该作者]
