RadAjaxLoadingPanel - in UI for ASP.NET AJAX

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RadAjaxLoadingPanel -

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Ajax

This is a migrated thread and some comments may be shown as answers.

JH asked on 13 Jul 2010, 01:12 PM

Hi,

I have started to use RadAjaxManager instead of ASP UpdatePanels to control what section of the page that should be updated.
I also know how to use the RadAjaxLoadingPanel in combination with AjaxSettings to show a loading symbol over different controls (see below).

<telerik:RadAjaxManager>
   <telerik:AjaxSetting AjaxControlID="btnDummy">
      <UpdatedControls>
         <telerik:AjaxUpdatedControl ControlID="pnlToUpdate" LoadingPanelID="RadAjaxLoadingPanel1" />
      </UpdatedControls>
   </telerik:AjaxSetting>
</telerik:RadAjaxManager>
<telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server">
</telerik:RadAjaxLoadingPanel>

What I want to achieve now is to show the RadAjaxLoadingPanel loading symbol, but not over a specific control.
For example, I would like to be able to display a loading animation next to a button when pressing that button. How can this be achieved with the RadAjaxManager?

Thanks!

3 Answers, 1 is accepted

answered on 13 Jul 2010, 01:35 PM

Hi JH,

When you set IsSticky="true" to the RadAjaxLoadingPanel, then the control is displayed at the place it exists in the page markup.

In addition, you can show and hide a RadAjaxLoadingPanel explicitly by using the RadAjaxManager's OnRequestStart and OnResponseEnd events.

Please refer to the control's documentation:

http://www.telerik.com/help/aspnet-ajax/ajxshowhideloadingpanel.html

http://www.telerik.com/help/aspnet-ajax/ajxshowloadingpanelnexttoajaxinitiator.html

The following demo shows how to position the loading panel at a certain place on the page - you can use it to position the loading panel next to any element on the page.

http://www.telerik.com/help/aspnet-ajax/ajxcenterloadingpanel.html

Best wishes,
Dimo
the Telerik team

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answered on 13 Jul 2010, 04:55 PM

Hi,

I've read those guides, and can still not get it to work properly.
Should I treat the sticky loading panel as an updated control (as below?)
I do not want to set the DefaultLoadingPanelID for the entire RadAjaxManager.
I have also tried to set the sticky loading panel as LoadingPanelID for any random updated control, but this only leads to a white page while loading. What am I doing wrong?

<telerik:RadAjaxManager>
   <telerik:AjaxSetting AjaxControlID="btnDummy">
      <UpdatedControls>
         <telerik:AjaxUpdatedControl ControlID="RadAjaxLoadingPanel1" LoadingPanelID="RadAjaxLoadingPanel1" />
      </UpdatedControls>
   </telerik:AjaxSetting>
</telerik:RadAjaxManager>
<telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server">
</telerik:RadAjaxLoadingPanel>

<asp:Button id="btnDummy" runat="server"/>
<telerik:RadAjaxLoadingPanel ID="RadAjaxLoadingPanel1" runat="server" IsSticky="true">

Thanks
</telerik:RadAjaxLoadingPanel>
<asp:Panel id="pnlDummy" runat="server" />

answered on 14 Jul 2010, 02:19 PM

Hello JH,

As I said, when you set IsSticky="true", the RadAjaxLoadingPanel is displayed where you have placed it in the page markup. In addition, you should take care of the control's width, height and positioning yourself.

>> Should I treat the sticky loading panel as an updated control (as below?)

No.

>> I do not want to set the DefaultLoadingPanelID for the entire RadAjaxManager.

You don't have to.

>> I have also tried to set the sticky loading panel as LoadingPanelID for any random updated control, but this only leads to a white page while loading. What am I doing wrong?

Probably you have tried to implement a loading panel which spans over the whole page? However, you should either set the control's Skin property, or use a loading template (e.g. add an animated image, etc).

Please inspect the provided help articles once again, especially this one:

http://www.telerik.com/help/aspnet-ajax/ajxshowloadingpanelnexttoajaxinitiator.html

If you need further assistance, please send a runnable web page and explain what exactly are you trying to do.

All the best,
Dimo
the Telerik team