asp.net – 从用户控件访问父页面属性

这是我的default.asp代码隐藏的开始：

Partial Class _Default
     Inherits System.Web.UI.Page

     Private _selectedID As String = "74251BK3232"

     Public Property SelectedID() As String
          Get
               Return _selectedID 
          End Get
          Set(ByVal value As String)
               _selectedID = value
          End Set
     End Property

这是我的用户控制代码隐藏的开始：

Partial Class ctrlAddAttribute
    Inherits System.Web.UI.UserControl
     Dim selectedID As String = Me.Parent.Page.selectedID()

我收到错误“selectedID不是System.Web.UI.Page的成员”

请adivse！