Other controls "flashing" on AJAX PostBack

2 posts, 0 answers
  1. Benoit
    Benoit avatar
    1 posts
    Member since:
    Jun 2010

    Posted 09 Jun 2010 Link to this post

    Hi !

    I've got dropdownlists in ItemTemplates of a DataGrid. Those dropdownlists are meant to update other ones (within the same DataGridItem) The DataGrid is itself in a Repeater.

    On the ItemDataBound event of the DataGrid, I populate the AjaxSettings collection of the RadAjaxManager control in the webform.

    All the updates (AJAX PostBack calls) work very well but all dropdownlists on the page "flash" although they do not get updated (they're not meant to either !)....?! Some of the dropdowns flashing are not added to the AjaxSettings collection (on purpose)..... There are other controls on the webform (i.e. Labels) and they remain "static" so is the rest of the webform..... only dropdownlists disappear and re-appear after the AJAX Postback is completed.......

    Is that behaviour "by design" ?! Can that be avoided ?!

    Thank you !


  2. Maria Ilieva
    Maria Ilieva avatar
    4017 posts

    Posted 14 Jun 2010 Link to this post

    Hi Benoit,

    Could you please elaborate a little bit more on your scenario? Does the DropDownLists add to the RadAjaxSettings. Are you using the RadGrid into UserControl and adding the settings by RadAjaxManagerProxy control? If you are using regular RadAjaxManager on the page, please note that the dynamic settings should be always added in a Page event handler, which is executed each time during the page lifecycle (Page_Load, Page_PreRender) so that the control could be ajaxified when the page is initially loaded.
    Also please confirm that you are using the latest version of RadControls for ASP .NET Ajax.

    Maria Ilieva
    the Telerik team

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