RadAjaxManager including RadComboBox - performance problem

4 posts, 0 answers
  1. Inbal
    Inbal avatar
    6 posts
    Member since:
    Sep 2007

    Posted 01 Dec 2008 Link to this post


    We have a page with RadAjaxManager and RadComboBox on it.
    When we fill the RadComboBox with normal amount of items (up to 300 items), the performance is good.
    We need to fill the RadComboBox with more then 3000 items and then the performance is very slow.
    When we remove the RadAjaxManager from the page, and the page works with regular postbacks, the page loading is quick even that 3000 items are filled into the RadCombobox.

    Is there a known bug of RadAjaxManager when working with RadComboBox that filled with large amount of data?


  2. Maria Ilieva
    Maria Ilieva avatar
    4017 posts

    Posted 03 Dec 2008 Link to this post

    Hello Inbal,

    Thank you for contacting us.

    Could you please test the application by using regular asp UpdatePanel to wrap the ComboBox and let me know if the problem still appear. Also, you could use the RadComboBox with LoadOnDemand in order ti improve its performance in sceanrios with big number of items.

    Maria Ilieva
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  3. Marian
    Marian avatar
    49 posts
    Member since:
    Sep 2008

    Posted 22 Jun 2009 Link to this post

    Hello Maria,
    I have similar problem with RadComboBox. I use LinqDataSource (only two columns - Text and value are selected from its) with about 1200 items.
    When I use LoadOnDemand then performance is good, but I have several scenarios, where I can not use LoadOnDemand. Is there any idea to increase performance of RadComboBox?
  4. Paul
    Paul avatar
    4281 posts

    Posted 23 Jun 2009 Link to this post

    Hi Marian,

    Please refer to this article for details on the matter.

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