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If e.DataCol.Name = "日期" Then
If e.DataRow.IsNull("日期") Then
e.DataRow("清单号") = 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 = Format(d,"yyyyMM") '生成清单号的前6位,4位年,2位月.
If e.DataRow("清单号").StartsWith(bh) = False '如果清单号的前6位不符
Dim max As String
Dim idx As Integer
max = e.DataTable.Compute("Max(清单号)","日期 >= #" & fd & "# And 日期 <= #" & ld & "# and 是否开piao=" & e.DataRow("是否开piao") & " And [_Identify] <> " & e.DataRow("_Identify")) '取得该月的最大清单号
If max > "" Then '如果存在最大清单号
idx = CInt(max.Substring(7)) + 1 '获得最大清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
If e.DataRow("是否开piao")=True Then
e.DataRow("清单号") = bh & Format(idx,"000")
End If
If e.DataRow("是否开piao")=False Then
e.DataRow("清单号") = bh & Format(idx,"0000")
End If
End If
End If
End If
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Post By：2020/1/3 14:29:00 [只看该作者]
