将《教程中的》可视化授权移植到例子中的外部数据源后,为何无效呢?(外部数据源中,用户表为Users,用户名列为:UserName,数据源名为User)代码如下:
For Each t As Table In Tables '显示所有表和列
t.Visible = True
t.AllowEdit = True
For Each c As Col In t.Cols
c.Visible = True
c.AllowEdit = True
Next
Next
Tables("授权表").Visible = (User.Type <> UserTypeEnum.User )
If User.Type <> UserTypeEnum.User Then
Return
End If
For Each dr As DataRow In DataTables("授权表").Select("用户名 = '" & User.Name & "'" ) ‘这个地方要修改成外部数据源的用户名列吗?
If dr.IsNull("列名") Then
Tables(dr("表名")).Visible = Not dr("不可见")
Tables(dr("表名")).AllowEdit = Not dr("不可编辑")
Else
Dim nms() As String = dr("列名").Split(",")
For Each nm As String In nms
Tables(dr("表名")).Cols(nm).Visible = Not dr("不可见")
Tables(dr("表名")).Cols(nm).AllowEdit = Not dr("不可编辑")
Next
End If
Next