主题：品牌如何按“助记码”产生的数字规律自动递增编号？

关于禁止重复内容，看这段帮助的示例四：
 
http://help.foxtable.com/topics/0624.htm

 
要清除编号，可以改一下代码：
 
If e.DataCol.Name  = "品牌" Then
    If e.NewValue > ""  Then
        Dim s1 As String = GetPy(e.NewValue,True)
        Dim s2 As String
        Dim cs() As String = New String() {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"}
        Dim ns() As String = new String(){15,52,54,13,33,12,11,21,43,22,23,24,25,51,44,45,35,32,14,31,42,53,34,55,41,26}
        For i As Integer = 0 To s1.length -1
            Dim s3 As String = s1.Chars(i)
            If Char.IsNumber(s3)  = False Then
                For n As Integer =0 To cs.Length -1
                    If cs(n) = s3 Then
                        s3 = ns(n)
                        Exit For
                    End If
                Next
            End If
            s2 = s2 & s3
        Next
        s2 = s2.PadRight(4,"0")
        s2 = s2.SubString(0,4)
        Dim drs As List(of DataRow) = e.DataTable.Select("编号 Like '" & s2 & "*' And [_Identify] < " & e.DataRow("_Identify"))
        If drs.Count = 0
           e.DataRow("编号") = s2 & "01"
        Else
           e.DataRow("编号") = s2 & Format(drs.count + 1,"00")
        End If
    Else
        e.DataRow("编号") = Nothing
    End If
End If

类似锁定非空内容，参考：

还来一个例子，我们知道易表有一个锁定非空内容的功能，也就是只有空白单元格才能输入数据，一旦输入就不能修改，在Foxtable我们也可以很轻松地实现这个功能，例如希望锁定“标注”列的非空内容：

编号不就是要递增吗？

不要递增，那就去掉代码中递增的代码，改为：

If e.DataCol.Name  = "pp" Then
    If e.NewValue > ""  Then
        Dim s1 As String = GetPy(e.NewValue,True)
        Dim s2 As String
        Dim cs() As String = New String() {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"}
        Dim ns() As String = new String(){15,52,54,13,33,12,11,21,43,22,23,24,25,51,44,45,35,32,14,31,42,53,34,55,41,26}
        For i As Integer = 0 To s1.length -1
            Dim s3 As String = s1.Chars(i)
            If Char.IsNumber(s3)  = False Then
                For n As Integer =0 To cs.Length -1
                    If cs(n) = s3 Then
                        s3 = ns(n)
                        Exit For
                    End If
                Next
            End If
            s2 = s2 & s3
        Next
        s2 = s2.PadRight(4,"0")
        s2 = s2.SubString(0,4)
        e.DataRow("ppbh") = s2
    Else
        e.DataRow("ppbh") = Nothing
    End If
End If

其实你在DataColChanging时间设置了代码，对货品编号进行了处理，那么品牌编号类似：

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