上图是我做的根据公司名称和月生成的格式piao号,目的是:不同公司,piao号从1开始生成,相同公司piao号则连续递增。可总是不对,怎么都找不到原因,请老师指导,谢谢!
If e.DataCol.Name = "报销日期" Then
If e.DataRow.IsNull("报销日期") Then
e.DataRow("piao号") = Nothing
Else
Dim GS As String = Tables("费用汇总").current("公司")
Dim py As String = GetPY(GS,1)
Dim d As Date = e.DataRow("报销日期")
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 = py & Format(d,"yyyyMM") '生成编号的前8位,2位公司,4位年,2位月.
If e.DataRow("piao号").StartsWith(bh) = False '如果编号的前8位不符
Dim max As String
Dim idx As Integer
max = e.DataTable.Compute("Max(piao号)","报销日期 >= #" & fd & "# And 报销日期 <= #" & ld & "# And [_Identify] <> " & e.DataRow("_Identify")) '取得该月的最大编号
If max > "" Then '如果存在最大编号
idx = CInt(max.Substring(9,3)) + 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("piao号") = bh & "-" & Format(idx,"000")
End If
End If
End If