Hello @ all,
I have the same error ("Cannot unregister UpdatePanel with.....") but I'm not able to use your solution.
My problem is that i'm only using one page event at the the user control where the error occurs (Page_Load event for adding an event handler).
I cannot use the pre_init event because a user control don't have it.
can someone give me a hint?
Masterpage:
1 ...
2
3 <form id="form1" runat="server">
4 <asp:ScriptManager ID="scriptManager" runat="server" />
5
6 ...
7
8 <div id="content">
9 <asp:ContentPlaceHolder ID="placeHolder_content" runat="server">
10 </asp:ContentPlaceHolder>
11 </div>
12
13 ...
aspx Page:
1 <%@ Register src="~/aspx/test.ascx" TagPrefix="test" tagname="testcontrol" %>
2
3 ...
4
5 <test:testcontrol ID="myTestControl" runat="server" />
6
7 ...
user control:
1 ...
2
3 <asp:UpdatePanel ID="upd_pnl" runat="server" RenderMode="Block">
4 <ContentTemplate>
5 <asp:DropDownList ID="cmb_test" runat="server" AutoPostBack="true">
6 <asp:ListItem>test1</asp:ListItem>
7 <asp:ListItem>test2</asp:ListItem>
8 <asp:ListItem>test2</asp:ListItem>
9 </asp:DropDownList>
10 </ContentTemplate>
11 </asp:UpdatePanel>
12 ...
In the code behind class of the user control i only have registered the event SelectedIndexChanged manualy (in the page_load event)