主题：[求助]辨识datarow的列值是否发生变化【已解决】

        If dr.RowState = DataRowState.Modified Then

            Dim sql As String

            For Each dc As String In ColNames

                If dr(dc)<> "" Then

                    sql = dc & "='" & dr(dc) & "'," & sql

                End If

            Next

            Dim key As String="enterprise_id= '"& dr("enterprise_id") &"' "

            sql=sql.trim(",")

            Dim rs As String =Functions.Execute("UpdateById",key,tdata,sql )

        End If

用于辨识dadarow的状态时，能不能用DataColChanged辨识列是否发生变化？用于精确辨识哪些列发生了变化？

回复2楼，注意判断dr.OriginalValue(dc)是否为空，如

If dr.OriginalValue(dc) isNot DBNull.Value Then