ASP.NET 4.0 UpdatePanel and UserControl with PlaceHolder
- by Chris
I don't know if this is ASP.NET 4.0 specific but I don't recall having this problem in previous versions.
I have very simple user control called "TestModal" that contains a PlaceHolder control which I use to instantiate a template in. When I put an UpdatePanel inside this UserControl on the page the updatepanel only does full postbacks and not partial postbacks. What gives?
USER CONTROL MARKUP:
<%@ Control Language="C#" AutoEventWireup="true" CodeBehind="TestModal.ascx.cs" Inherits="MyProject.UserControls.TestModal" %>
<div id="<%= this.ClientID %>">
<asp:PlaceHolder ID="plchContentTemplate" runat="server"></asp:PlaceHolder>
</div>
USER CONTROL CODE BEHIND:
public partial class TestModal : System.Web.UI.UserControl
{
private ITemplate _contentTemplate;
[TemplateInstance(TemplateInstance.Single)]
[PersistenceMode(PersistenceMode.InnerProperty), TemplateContainer(typeof(TemplateControl))]
public ITemplate ContentTemplate
{
get { return _contentTemplate; }
set { _contentTemplate = value; }
}
protected override void OnInit(EventArgs e)
{
base.OnInit(e);
if (_contentTemplate != null) _contentTemplate.InstantiateIn(plchContentTemplate);
}
}
ASPX PAGE MARKUP:
<ajaxToolkit:ToolkitScriptManager ID="scriptManager" EnablePartialRendering="true" AllowCustomErrorsRedirect="true" CombineScripts="true" EnablePageMethods="true" ScriptMode="Release" AsyncPostBackTimeout="180" runat="server"></ajaxToolkit:ToolkitScriptManager>
<uc1:TestModal ID="testModal" ClientIDMode="Static" runat="server">
<ContentTemplate>
<asp:UpdatePanel ID="upAttachments" UpdateMode="Conditional" ChildrenAsTriggers="true" runat="server">
<ContentTemplate>
<asp:LinkButton ID="lnkRemoveAttachment" runat="server"><img src="/images/icons/trashcan.png" style="border: none;" /></asp:LinkButton>
</ContentTemplate>
</asp:UpdatePanel>
</ContentTemplate>
</uc1:TestModal>
