Dim kd As String = "kd"
Dim max As String
Dim idx As Integer
max = e.DataTable.Compute("Max(编号)","编号 like \'" & kd & "%\' ")
If max > "" Then \'如果存在最大支付编号
idx = CInt(max.Substring(kd.length)) + 1 \'获得最大支付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") = kd & Format(idx,"0000")