主题：[求助] 带字母的自动编号的问题

If e.DataRow.IsNull("日期") Then
    e.DataRow("日期") = Date.Now()
End If

Dim d As Date = e.DataRow("日期")
Dim y As Integer = d.Year - 2001
Dim m As Integer = d.Month - 1
Dim bh As String = str.Substring(y,1) & str.Substring(m,1)
If e.DataRow("编号").StartsWith(bh) = False
    Dim max As String
    Dim idx As Integer
    max = e.DataTable.Compute("max(编号)","编号 like '" & bh & "%'")
    If max > "" Then
        idx = CInt(max.Substring(bh.length+1,3)) + 1
    Else
        idx = 1
    End If
    e.DataRow("编号") = bh & "-" & Format(idx,"000")
End If