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AJAX :: Dynamically Remove And Then Add Content To An Updatepanel?


I have an update panel and insidethere area button i want when i press the button the content well be cleared and then a label will be added to theupdate panel dynamiclyand focus that the button is inside the update panel

View 4 Replies (Posted: Apr 26, 2010 05:17 PM)

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I have a dropdownlist, that causes a postback. On the SelectedIndexChanged event, is it possible to force a placeholder that is within a different UpdatePanel to change it's visibility?

For example, when the SelectedItem.Value of DropDownList1 is "1" then show Placeholder1, otherwise hide it.

What I am most interested in is how to configure the UpdatePanels to allow this.

Posted: Jun 23, 2010 02:49 PM

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I wrote this code and it works perfectly to add controls.

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Here is the code:


The panelGroup is within an UpdatePanel.

Posted: May 20, 2010 09:25 AM

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Posted: Mar 09, 2011 01:30 AM

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I am 100% sure this question has been asked before and I am really sorry if I have been blind in not being able to find it through searching, I have tried! :o)

First off, I have a text box which updates an UpdatePanel when clicked off, however I want the Panel to update as I type another character without changing my cursor focus.

Posted: Jan 08, 2008 01:44 PM

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AJAX :: Adding Trigger To UpdatePanel From Content Page?
I got an updatepanel which contains a normal panel on MasterPage. The updatepanel does not contain content place holder. On the content page, I have to add triggers to updatepanel for buttons that are dynamically created on "page_load" event. The problem is that, since the page_load event of content page is being called before master page's page_load event, UpdatePanel is not being created. So that, whenever i try to add triggers in page_load event of content page, i got an error like "A control with ID 'ctl00$editableContent$ctl42' could not be found for the trigger in UpdatePanel 'up1'."

The code below is for adding triggers to updatepanel for buttons.

MasterClass master = (MasterClass)Page.Master;
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I have the same problemas [URL] However, the solution doesn't work for me since I'm using .Net 4.0 and xhtmlConformance is not there from start.

Basically, using a master page, the RadioButtonList still do the whole page postback even it's in the UpdatePanel. When I put the exact same code in a standalone page without a master page, it works as expected.

Master Page:


Content page:


Standalone page:


Posted: Feb 04, 2010 03:07 PM

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Posted: Jan 14, 2010 11:56 PM

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AJAX :: Dynamically Adding Controls To A Page With An Updatepanel?
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link.Font.Underline =
link.Font.Bold =
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AJAX :: Dynamically Adding A Link Button To An Updatepanel
I have gone through several posts on this forum about adding a linkbutton to an updatepanel dynamically. A lot of them say just give it a unique ID and some say you have to register add an AsyncPostBackTrigger to the triggers collection. I have tried both and neither work. I have this simple test that I created - the code is below - there is nothing else in this project but the code you see so I know nothing else is interfering with it.

I have also seem people complaining that the linkbutton causes the entire page to postback - in my case nothing happens... I have seen people talk about having to add the triggers on the page init however I can't do that - I am dynamically creating menus based on a selection in a listbox... (not in this simple test but in a larger project) I am using Visual web developer express 2010 if that makes any difference.


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i loaded usercontrol dynamically in this case:


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I have some code that I am working on that uses an UpdatePanel and some dynamically created buttons to perform functions. The problem is that the dynamically created buttons aren't working the same as my test static button, which is behaving exactly as it should be.

So I was wondering if someone would be willing to simply post an example (in VB.NET or C# please) of the following:

An UpdatePanel has a Label and a Placeholder inside of it

The Placeholder has a dynamic button added to it

Clicking on this button will make the Label say "Hi" without performing a full page postback.

If I can just get that much to work, I am sure that the rest of the code will be fine. I just can't seem to get my dynamic buttons to act like my static ones do in an UpdatePanel.

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A little background on the code:

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If I do not re-generate the pages on post back then the problem goes away - as do the custom tabs.

The only thing I could find was from last year, and was supposedly fixed (

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MyMasterPage.aspx and content page MyDefault.aspx.
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Below is full code MyMasterPage.aspx.[Code]....

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Here is my code




Posted: Nov 11, 2010 08:23 AM

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