下边这段代码是自动编号的,但目前编号进行到999,无法再进行自动编号,出错信息:Exception has been thrown by the target of an invocation.如何更改,谢谢
Select e.DataCol.Name
Case "收到日期","收发文"
If e.DataRow.IsNull("收到日期") Then
e.DataRow("收文编号") = Nothing
Else
Dim d As Date = e.DataRow("收到日期")
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,1,1) '获得该年的第一天
Dim ld As Date = New Date(y,12,31) '获得该年的最后一天
Dim bh As String = e.DataRow("收发文") & Format(d,"yyyy") & "-" '生成编号的前缀
If e.DataRow("收文编号").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 = "收发文 = '"& e.DataRow("收发文") & "' And 收到日期 >= #" & fd & "# And 收到日期 <= #" & ld & "#"
max = e.DataTable.Compute("Max(收文编号)",flt) '取得该年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 = max.LastIndexOf("-") + 1
idx = CInt(max.Substring(idx,3)) + 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("收文编号") = bh & Format(idx,"000")
End If
End If
End Select
[此贴子已经被作者于2014-11-24 12:39:09编辑过]