Response.Redirect如果启用，则没有任何内容（ASP.NET）和EventValidation返回错误

<div>
<asp:Repeater ID="rptrHalls" runat="server" OnItemCommand="Choose_Hall">
    <ItemTemplate>
        <asp:Button ID="btnChooseHall" runat="server"
        CommandName="<%# Container.DataItem %>" Text="<%# Container.DataItem %>"
         />
    </ItemTemplate>
</asp:Repeater>
</div>

        ' Show which halls they are eligible for.
    Dim dbHalls As New pbu_housingDataContext
    'Dim gender As String = Session("gender").ToString
    Dim selectedHalls = (From sh In dbHalls.Rooms _
                         Where sh.gender = Session("gender").ToString _
                         Where sh.current_occupancy < sh.max_occupancy _
                         Where sh.is_available = True _
                         Select sh.building_name).Distinct()
    rptrHalls.DataSource = selectedHalls
    rptrHalls.DataBind()

    Public Sub Choose_Hall(ByVal Sender As Object, ByVal e As RepeaterCommandEventArgs)
    Session("Hall") = e.CommandName.ToString
    Response.Redirect("select_room.aspx")
    End Sub