RadComboBox Just Freezes

[Brady]

I have two examples now, my first two, where a place a RadComboBox on a web form, and populate it, but it won't drop down.  I first picked this up on a big web application project, and then on a simple little web site project, for investigating this.  In my sample project, it is the only control on the page  besides the ScriptManager, and there are rows in the data source, and it does display the first row, but it just doesn't drop down.  Any ideas on this?

BTW, this is theh first time I've restored this project onto a new XP machine, where I previously was working on a Vista machine that died.

[Kamen Bundev]

Hi Brady,

Can you send us this example project so that we can take a look at it and help you fix that? You can open a support ticket to attach it. Thank you in advance.

Kind regards,
Kamen Bundev
the Telerik team

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[Entegral]

For what its worth, maybe it will help someone else.

I had the same problem on RadControls 2009 Q3 with the radcomboboxes freezing (unable to click dropdown).

I isolated it to a RadAjaxLoadingPanel I had on the same page and the "IsSticky=true" property, Once I removed it my dropdowns suddenly worked again. 

[Ken Kumar]

I am using the 2009 Q3 SP1 controls and have the same problems with the radComboBox.
IsSticky property didnt work for me. I disabled the ajax temporarily to continue working on the page by setting the EnableAJAX property to false.
Ajax works fine for the first request and combobox freezes after that.
Here's my scenario in detail:
I have two comboboxes, second comboBox items changes based on the first combobox selection. So,I am populating the second comboBox items on the first comboBox's SelectedIndexChanged Event.
In the AjaxSettings of radAjaxManager I have set the first combox box as AjaxControlID and the second comboBox as the AjaxUpdatedControl.

<

 

telerik:RadAjaxManager ID="RadAjaxManager1" runat="server" DefaultLoadingPanelID="RadAjaxLoadingPanel1">

 

 

<AjaxSettings>

 

 

        <telerik:AjaxSetting AjaxControlID="cboCategory">

 

 

            <UpdatedControls>

 

 

                    <telerik:AjaxUpdatedControl ControlID="cboProducts"/>

 

 

            </UpdatedControls>

 

 

        </telerik:AjaxSetting>

 

 

</AjaxSettings>

 

 

 

 

 

</telerik:RadAjaxManager>

 

<

 

telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server">

 

 

<img src='<%= RadAjaxLoadingPanel.GetWebResourceUrl(Page, "Telerik.Web.UI.Skins.Default.Ajax.loading6.gif") %>'

 

 

alt="Loading.." />

 

 

</telerik:RadAjaxLoadingPanel>

 

[T. Tsonev]

Hi,

Your AJAX settings look fine and should work. Are you getting JavaScript or server-side errors? Such problem can also be caused by invalid markup on the page. In this case the RadAjaxManager might not be able to update the controls correctly. You can check the page markup by using the W3C validator service.

I hope this helps.

Best wishes,
Tsvetomir Tsonev
the Telerik team

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[Ken Kumar]

Hi,

I am not getting any errors. Let me add some more detail.
I am using the asp.net ajax controls in the sharepoint site(MOSS 2007 WSS 3.0).

When I enable the Ajax I notice the following problems:
1) Clicking on any control on the page for the first time sends a postback and from the next request onwards it shows ajax behavior
2) The filter menu on the radGrid does not pop open as soon as ajax start working on the page
3) ComboBox(es) freezes - cannot even open the drop down/select anything. Replacing comboboxes with the dropdownlist works fine.

Any thoughts?

 

 

[Veselin Vasilev]

Hello Ken Kumar,

Probably there is a problem with the javascript web resources. Please check the following articles on how to property deploy RadControls in MOSS and everything should work as expected.

• Extending your MOSS site in ASP.NET 2.0 or ASP.NET 3.5
• Deploying RadControls for ASP.NET Ajax
• Incorporating RadControls for ASP.NET Ajax in MOSS WebSites

Kind regards,
Veskoni
the Telerik team

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[Mujeeb]

Please try for conditional Postback

​​​

 

 

 

 

<

telerik

:

RadAjaxPanel

ID

="uxRadAjaxPanel"

runat

="server"

LoadingPanelID

="uxRadAjaxLoadingPanel"

 

 

 

 

Width="100%" Height="100%" ClientEvents-OnRequestStart="conditionalPostback">

 

 

function

conditionalPostback(ajaxManager, args) {

 

 

 

 

if

(args.get_eventTarget().indexOf(

"idofcontrol"

) > 0)

 

args.set_enableAjax(

 

 

false

);

 

}

 

​​​​​