中继器中的复选框控件不保持状态

对此有点困惑。我的印象是,如果您将服务器控件添加到中继器的ItemTemplate中,那么分配给这些控件的ID将在回发期间保持不变,并且状态将保持不变。但这似乎没有发生。这是我的项目模板:

<asp:HiddenField ID="hidPending" runat="server" value="<%# DataBinder.Eval(Container.DataItem, "Id")%>" />
<td class="leftpadd"><uc:restrictedtext ID="uclblCategory" runat="server" Width="125" /></td>
<td style="border-left:1px solid #528ABD;" class="leftpadd"><%# DataBinder.Eval(Container.DataItem, "SelectedOptions")%></td>
<td style="border-left:1px solid #528ABD;" class="leftpadd"><%# DataBinder.Eval(Container.DataItem, "Price.IncludingTax", "{0:C}")%></td>
<td style="border-left:1px solid #528ABD;" class="leftpadd"><%# DataBinder.Eval(Container.DataItem, "ExtrasCost", "{0:C}")%></td>
<td style="border-left:1px solid #528ABD;" class="leftpadd"><%# DataBinder.Eval(Container.DataItem, "Quantity", "{0:000}")%></td>
<td style="border-left:1px solid #528ABD;" class="leftpadd"><asp:CheckBox ID="chkPendingItems" runat="server" /></td> 

很好的普及。我希望用户能够使用复选框从中继器中选择某些项目,然后单击中继器外部的按钮“处理”这些项目(即对这些项目执行一些数据操作)。这是我的按钮点击代码:

Private Sub lnkPendingProcessSelected_Click(ByVal sender As Object, ByVal e As System.EventArgs) Handles lnkPendingProcessSelected.Click
    For Each rItem As RepeaterItem In rptPendingItems.Items
        If rItem.ItemType = ListItemType.Item Or rItem.ItemType = ListItemType.AlternatingItem Then
            Dim chk As CheckBox = DirectCast(rItem.FindControl("chkPendingItems"), CheckBox)
            If chk.Checked Then
                Dim orderItemId As Integer
                Dim hid As HiddenField = DirectCast(rItem.FindControl("hidPending"), HiddenField)
                orderItemId = CInt(hid.Value)
                My.Application.ManagerFactory.OrderManagerInstance.ChangeOrderItemStatus(orderItemId, Concrete.Cms.DataTransferObjects.OrderItemStatus.Processing)
            End If
        End If
    Next
End Sub