主题：[讨论]自动复制行的问题

If e.DataCol.Name = "逻辑列名" AndAlso e.DataRow("逻辑列名") = True Then
    Dim nma() As String = {"A1","A2","A3","A4"} 'A表数据来源列
    Dim nmb() As String = {"B1","B2","B3","B4"} 'B表数据接收列
    Dim dr As DataRow = DataTables("表B").AddNew
    For i As Integer = 0 To nma.Length - 1
        dr(nmb(i)) = e.DataRow(nma(i))
    Next
End If

比如逻辑名为“审核”，执行以上语句的时候第一次可以，但是如果需要修改行内容，重新点审核的时候也会再一次复制到另外一个表，请问要如何处理？谢谢