If e.DataCol.Name = "上传日期" Then
If e.DataRow.IsNull("上传日期") Then
e.DataRow("上传单号") = Nothing
Else
e.DataRow.save
Dim bh As String = Format(e.DataRow("上传日期"), "yyMM") \' 取得编号的8位前缀
If e.DataRow("上传单号").StartsWith(bh) = False Then\'如果编号的前8位不符
Dim dt2 As DataTable = DataTables("发动机记录表")
Dim max As String
Dim idx As Integer
max = e.DataTable.SQLCompute("Max(上传单号)", "上传单号 like \'" & "ZK" & bh & "%\' And [_Identify] <> " & e.DataRow("_Identify")) \'取得该天的最大编号
If max > "" Then \'如果存在最大编号
idx = CInt(max.Substring(6, 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("上传单号") = "ZK" & bh & Format(idx, "000")
e.DataRow.save
End If
End If
End If