c# - Gridview ItemTemplate 中的 updatePanel 在回发时有问题

Question

在我的 gridItemTemplate 中，我有更新面板和复选框，

<ItemTemplate>
   <asp:UpdatePanel runat="server" ID="upChkOption">
       <ContentTemplate>   
           <asp:CheckBox runat="server" ID="chkOption" AutoPostBack="true"   
            OnCheckedChanged="chkOption_CheckChanged">                                
       </ContentTemplate>
    </asp:UpdatePanel>
</ItemTemplate>

第一次运行没有错误，但是在postback之后，出现了这个错误

Cannot unregister UpdatePanel with ID 'upChkOption' since it was not registered with   
the ScriptManager. This might occur if the UpdatePanel was removed from the control  
tree and later added again, which is not supported. Parameter name: updatePanel

我该如何解决？

Answer 1

将 UpdatePanel_Unload 添加到 UpdatePanel 的 OnUnload 事件中:

<asp:UpdatePanel ID="upChkOption" runat="server" OnUnload="UpdatePanel_Unload">

在后面的代码中添加

protected void UpdatePanel_Unload(object sender, EventArgs e) 
      {
 MethodInfo methodInfo = typeof(ScriptManager).GetMethods(BindingFlags.NonPublic | BindingFlags.Instance)
            .Where(i => i.Name.Equals("System.Web.UI.IScriptManagerInternal.RegisterUpdatePanel")).First();
  methodInfo.Invoke(ScriptManager.GetCurrent(Page),
            new object[] { sender as UpdatePanel });
    }

Adding/removing UpdatePanels dynamicaly from a page

cannot-unregister-updatepanel-since-it-was-not-registered-with-the-scriptmanager-error