plz help me to solve this ajax problem

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if i add a calendar extender to the web form it shows this ..help me...

XML

The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).
Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.Web.HttpException: The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).

Source Error:

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.

Stack Trace:


[HttpException (0x80004005): The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).]
   System.Web.UI.ControlCollection.Add(Control child) +8674071
   AjaxControlToolkit.ScriptObjectBuilder.RegisterCssReferences(Control control) +619
   AjaxControlToolkit.ExtenderControlBase.OnLoad(EventArgs e) +53
   System.Web.UI.Control.LoadRecursive() +50
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Control.LoadRecursive() +141
   System.Web.UI.Page.ProcessRequestMain(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +627

Posted 5-Sep-12 17:51pm

Member 8388026

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_Amy · Answer 1 · 2012-09-05T17:53:00

Solution 1

First start the javascript code block with <%# instead of <%= and add the following in your code behind:

C#

protected void Page_Load(object sender, EventArgs e)
{
  Page.Header.DataBind();    
}

--Amit

Posted 5-Sep-12 17:53pm

_Amy

Updated 5-Sep-12 17:56pm

v3

Comments

Member 8388026 5-Sep-12 23:58pm

which code block the ajax register or the calendar extender

_Amy 6-Sep-12 0:08am

Wherever you used <%=.
Like $find('<%= txtName.ClientID %>') to $find('<%# txtName.ClientID %>')

Adittya Gupta · Answer 2 · 2012-09-05T18:22:00

Solution 2

You can use one of the following solutions depend upon your requirement:
1. Write your script inside the body tag of page.
2. Use steps mentioned in solution 1.

Posted 5-Sep-12 18:22pm

Adittya Gupta

prashant patil 4987 · Answer 3 · 2012-09-05T18:50:00

Solution 3

Hey see below link.
May be it will help you
Link 1[^]

Posted 5-Sep-12 18:50pm

prashant patil 4987

Prasad_Kulkarni · Answer 4 · 2012-09-05T19:22:00

You cannot modify the control tree when there are <% %> blocks. Check this [^]help topic for additional info.

Also have a look on similar threads:
The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).[^]
The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>).[^]
The Controls collection cannot be modified because the control contains code blocks (i.e. <% ... %>)[^]