Problem with RadComboBox and IE 8

3 posts, 1 answers
  1. Rolf Cerff
    Rolf Cerff avatar
    3 posts
    Member since:
    Sep 2009

    Posted 20 Apr 2011 Link to this post


    I have the following problem with RadComboBoxes and Internet Explorer 8:

    On a form I have about 12 RadComboBoxes, Skin Windows7.

    When I open this form, the form loads almost completely but the form remains in a unresponsive state. It is not possible to do anything on the form. The cursor shape shows as an hourglass.  At the same time, the iexplorer process consumes near 100% processor time. IE8 Javascript profiler says that a script of an embedded Telerik JavaScript resource needs a lot of time.

    After about 10s the form is usable and user can make input click on buttons, etc..

    The problem remains even the combo boxes are not bound or filled with any items.
    When I replace the RadComboBoxes with ASP:DropDownList controls the problem disappears.

    We want to use the RadComboBoxes, because we need LoadOnDemand, AutoComplete and virtual scrolling.

    With IE6, IE7 and Firefox 3.x, 4 there is no such problem at all.

    The version of the Telerik.Web.UI dll is 2010.2.929.35.

    Is this a known issue? Do we need a more current version of Telerik controls? Is there a workaround?

    All hints and solutions are welcome.


    Rolf Cerff

  2. Answer
    Helen avatar
    1052 posts

    Posted 26 Apr 2011 Link to this post

    Hello Rolf Cerff,

    I would suggest you to upgrade to the more recent version of the RadControls for ASP.NET AJAX.

    the Telerik team

    Browse the vast support resources we have to jump start your development with RadControls for ASP.NET AJAX. See how to integrate our AJAX controls seamlessly in SharePoint 2007/2010 visiting our common SharePoint portal.

  3. Rolf Cerff
    Rolf Cerff avatar
    3 posts
    Member since:
    Sep 2009

    Posted 06 May 2011 Link to this post

    Hello Helen,

    we've installed the Q3 2010 version of RadControls for ASP.NET AJAX. The problem disappeared. What I found is: there is also an performance issue when loading my page with an open Internet Explorer Developer bar.

    Thank you and regards

    Rolf Cerff
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