How to check if RadAjaxManager exists on the page?

[Simone]

I get this error because I am using a user control that is inside a page that doesn't have RadAjaxManager.
How do I check if RadAjaxManager exists on the parent page before getting the error? Some parent pages do have
RadAjaxManager, some others don't.

And if it doesn't exist,  I do not want to make a request.

Thanks in advance.

Exception Details: System.NullReferenceException: Object reference not set to an instance of an object.

Source Error:

Line 69: function refreshScreen(action) { Line 70: Line 71: $find("<%= RadAjaxManager.GetCurrent(Page).ClientID %>").ajaxRequest(action); Line 72: Line 73: }

[Simone]

I think I figured it out:


        function refreshScreen(action) {
            
            <%= RadAjaxManager.GetCurrent(Page) == null? "" : "$find('" + RadAjaxManager.GetCurrent(Page).ClientID  + "').ajaxRequest(action);"  %>
                
        }