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RadControls in UserControl - error

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matt asked on 01 Jul 2008, 03:59 PM

hello,

in my ASPX webforms i use UserControls for a header and footer. like so:

    
            <body> 
        
                <form id="form1" runat="server"> 
        
                    <Me:Header ID="myHeader" runat="server" /> 
        
                    <h1>my page</h1> 
        
                    <p>my content</p> 
        
                    <Me:Footer ID="myFooter" runat="server" /> 
        
                </form> 
        
            </body>

...however, if in my UserControl i include a RadControl then I get this error:

The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).

why is this? i am not using javascript or codeblocks. tho perhaps the RadControls are, i dunno.

ASCX

    
            <%@ Control Language="C#" AutoEventWireup="true" CodeBehind="Header.ascx.cs" Inherits="AutomaticVehicleLocator.controls.nav.Header" %> 
        
            <%@ Register TagPrefix="Telerik" Namespace="Telerik.Web.UI" Assembly="Telerik.Web.UI" %> 
        
            <div id="Header"> 
        
                <img id="imgLogo" src="/images/logo.gif" alt="NOPD Logo" width="59" height="56" runat="server" /> 
        
                <div id="userInfo"> 
        
                    <asp:Label ID="lblUsername" runat="server" /><br /> 
        
                    <a href="" class="help" id="btnSubmit">Help</a> 
        
                </div> 
        
                <!-- THIS BREAKS PAGE --> 
        
                <Telerik:RadComboBox ID="rcbTest" runat="server"> 
        
                    <Items> 
        
                        <telerik:RadComboBoxItem Value="1" Text="one" /> 
        
                    </Items> 
        
                </Telerik:RadComboBox> 
        
            </div>

thanks
matt

2 Answers, 1 is accepted

answered on 01 Jul 2008, 04:34 PM

ok after some more testing i discovered: this is not related to UserControls.

this snippit breaks:

    
            <body onload="PageLoadRecordsIntialize();"> 
        
                <form id="form1" runat="server"> 
        
                    <asp:ScriptManager ID="scriptManager" runat="server" /> 
        
                    <div id="Header"> 
        
                        <img id="imgLogo" src="/images/logo.gif" alt="NOPD Logo" width="59" height="56" runat="server" /> 
        
                        <div id="userInfo"> 
        
                            <asp:Label ID="lblUsername" runat="server" /><br /> 
        
                            <a href="#" class="help" id="lnkHelp">Help</a> 
        
                        </div> 
        
                        <!-- BROKEN: the below RadWindow breaks page rendering -->  
        
                        <Telerik:RadWindowManager ID="radWindowManager" VisibleOnPageLoad="false" runat="server"> 
        
                            <Windows> 
        
                                <Telerik:RadWindow 
        
                                    ID="rwHelp" 
        
                                    OpenerElementId="lnkHelp"  
        
                                    NavigateUrl="helpMain.aspx" 
        
                                    Modal="true" 
        
                                    Behavior="Move,Close,Resize" 
        
                                    Width="600px" 
        
                                    Height="500px" 
        
                                    Runat="server" /> 
        
                            </Windows> 
        
                        </Telerik:RadWindowManager> 
        
                    </div> 
        
                    <p>content</p> 
        
                </form> 
        
            </body>