c# - Gridview ItemTemplate 中的 updatePanel 在回发时存在问题

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，我得到了这个错误

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

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">

将其添加到代码后面

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