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"control contains code blocks" error appears with ajax panel

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Ajax

This is a migrated thread and some comments may be shown as answers.

Shrikant Kale asked on 05 Feb 2010, 12:25 PM

Hi Telerik team,

I am facing one problem with use of RadAjaxPanel. I have following code:

    
            <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="AjaxPanel.aspx.cs" Inherits="WebApplication10.AjaxPanel" %> 
        
            <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
        
            <html xmlns="http://www.w3.org/1999/xhtml" > 
        
            <head runat="server"> 
        
                <title></title> 
        
            </head> 
        
            <body> 
        
                <form id="form1" runat="server"> 
        
                <div> 
        
                <img src="<%= MyServer + "images/uparrow.gif"%>" /> 
        
                <telerik:RadScriptManager ID="mgr1" runat="server"></telerik:RadScriptManager> 
        
                <telerik:RadAjaxPanel ID="panel1" runat="server"></telerik:RadAjaxPanel> 
        
                </div> 
        
                </form> 
        
            </body> 
        
            </html> 
        
            ================================== 
        
            using System; 
        
            using System.Collections.Generic; 
        
            using System.Linq; 
        
            using System.Web; 
        
            using System.Web.UI; 
        
            using System.Web.UI.WebControls; 
        
            namespace WebApplication10 
        
            { 
        
                public partial class AjaxPanel : System.Web.UI.Page 
        
                { 
        
                    public string MyServer { get { return "http://server/"; } } 
        
                    protected void Page_Load(object sender, EventArgs e) 
        
                    { 
        
                    } 
        
                } 
        
            }

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

If I wrap RadAjaxPanel in another div(server control) then code works as expected.

    
            <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="AjaxPanel.aspx.cs" Inherits="WebApplication10.AjaxPanel" %> 
        
            <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> 
        
            <html xmlns="http://www.w3.org/1999/xhtml" > 
        
            <head runat="server"> 
        
                <title></title> 
        
            </head> 
        
            <body> 
        
                <form id="form1" runat="server"> 
        
                <div> 
        
                <img src="<%= MyServer + "images/uparrow.gif"%>" /> 
        
                <telerik:RadScriptManager ID="mgr1" runat="server"></telerik:RadScriptManager> 
        
                <div id="wrapper" runat="server"> 
        
                <telerik:RadAjaxPanel ID="panel1" runat="server"></telerik:RadAjaxPanel> 
        
                </div> 
        
                </div> 
        
                </form> 
        
            </body> 
        
            </html>

So I have a working solution for such problem, But can anyone provide more insight into this?

Regards
Shrikant

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&quot;control contains code blocks&quot; error appears with ajax panel

1 Answer, 1 is accepted

"control contains code blocks" error appears with ajax panel