If e.DataCol.Name = "登记日期" Then
If e.DataRow.IsNull("登记日期") Then
e.DataRow("编号") = Nothing
Else
Dim bh As String = "sk" & Format(e.DataRow("登记日期"),"yyyy") '取得编号的8位前缀
Dim max As String
Dim idx As Integer
max = e.DataTable.sqlCompute("Max(编号)","编号 like '" & 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(bh.length)) + 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("编号") = bh & Format(idx,"0000")
e.DataRow.Save
End If
End If