AJAX :: What Is The Uses Of Triggers In UpdatePanel Control

Jan 24, 2010

what is the uses f Triggers in UpdatePanel control

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AJAX :: How To Add WebUserControl As Triggers In Updatepanel

May 25, 2010

i was made 'webusercontrol'

and i use this:

event 'msgok' :when btnOk clicked
event ''msgcancel' : when btnCnl clicked
sub 'show' : show this dailog

problem : when i add my 'webusercontrol' to a page,

i can add events(msgok,msgcancel) to page codebehind,

but i cant add this to updatepanel tiggers.

make update panel able to add my 'webusercontrol' events ??

webusercontrol code:


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AJAX :: UpdatePanel Triggers Not Working With LoginPanel?

Aug 11, 2010

I ahve an update panel that is in my MasterPage, I have put a login panel which includes my login/anonymous views in my update panel. I have added the triggers parameter and I am getting an error. here is the code:


Here is the error I am getting:

A control with ID 'LoginButtonHDR' could not be found for the trigger in UpdatePanel 'UpdatePanel1'.


An unhandled exception occurred during the execution of the current web request. review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.InvalidOperationException: A control with ID 'LoginButtonHDR' could not be found for the trigger in UpdatePanel 'UpdatePanel1'.

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AJAX :: ItemCommand Event Not Wrapped In UpdatePanel.Triggers.AsyncPostBackTrigger

Dec 10, 2010

I'm using context menu control


<asp:UpdatePanel ID="updateVisor" runat="server" UpdateMode="Conditional">
<cc2:UIControlMenuContextual ID="menuVisor" runat="server" Width="200px" ForeColor="Black"
AutoHide="False" OnItemCommand="menuVisor_ItemCommand">
<cc2:ContextMenuItem CommandName="poner" meta:resourcekey="mc_poner"/>
<cc2:ContextMenuItem CommandName="sacar" meta:resourcekey="mc_sacar"/>


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AJAX :: Radiobuttonlist Triggers Updatepanel Only A Few Times And Stops Working?

Sep 30, 2010

I have a radiobutton that triggers the updatepanel to display or not..

when the page loads, i can select yes adn it displays, i can select no and it disappears.. i hit yes it reappears.. but after like the 3rd time going back and fourth testing the functionality, it stops displaying all together.

Is there something i need to look at to find out what is going on?

Here is my code on the page and code behind


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How To Programmatically Add Triggers To UpdatePanel

Apr 26, 2010

I am trying to write a quote generator. For each product, there are a set of options. I want to dynamically add a drop down list for each option, and then have their SelectedIndexChanged events all wired up to update the quote cost.

I am not having any trouble adding the DropDownList controls to my UpdatePanel, but I can't seem to wire up the events.

After the page loads, the drop downs are there, with their data, but changing them does not call the SelectedIndexChanged event handler, nor does the QuoteUpdatePanel update. I have something like this:

Edit: Since programmatically adding AsyncPostBackTrigger controls is not supported, I've change my code to this, but I still don't get the event:

Edit 2: Tried adding a PlaceHolder to add the drop down lists to (instead directly into the ContentTemplateContainer, still no events firing.


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Web Forms :: Cannot Work With Multiple Triggers For An Updatepanel

Feb 18, 2011

The first dropdownlist is for the type: SELECT * FROM TypesThe second dropdownlist is for the brand: SELECT * FROM Brandsnd the third dropdownlist is for the model:SELECT a.id, a.descriptionFROM Models AS a INNER JOIN Items AS b on b.id_modelo = a.idWHERE b.id_type = @id_typeAND a.id_brand = @id_brandGROUP BY a.id,a.descriptionORDER BY a.descriptionI have an UPDATEPANEL only on the Models dropdownlist with the asynchronous trigger on the Brands dropdownlist.
THe problem is when i change the Type, i want the other 2 dropdownlists to reset or just the Models dropdownlist.

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Forms Data Controls :: UpdatePanel Triggers For Buttons In A Formview?

Nov 9, 2010

I am using 3 updatepanels and each one of them having the formviews in each....

fromview 1 [code]...

the problem is the child triggers are not recognising these buttons because its inside a fromview..but on each button click everyting in two update panels are getting postback and doing sql calls...which makes updatepanels useless other than avoiding fullpostback.. how to set a childtriggger for buttons inside a formview of update panel...

all updatepanels are set to ChildrenAsTriggers="true" UpdateMode="Conditional"

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Forms Data Controls :: Using An UpdatePanel With Triggers On Imagebutton Inside A Datalist

Feb 22, 2010

I have a datalist that has an imagebutton, I want the updatepanel to trigger each click of the imagebutton of each result. How Can I do that?

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Dynamically Added Linkbutton Click Doesn't Fire (init Only) - Updatepanel And Triggers

Feb 21, 2011

When the user selects an "account" we dynamically create a linkbutton with the selected dates. However, the linkbutton onclick handler doesn't fire when the button is clicked.

Dim linkBtn As New LinkButton
linkBtn.Text = "blah"
AddHandler linkBtn.Click, AddressOf linkButtonHandler
linkBtn.ID = panelDatesRencontre.Controls.OfType(Of LinkButton).Count
Dim Trigger1 As New AsyncPostBackTrigger
Trigger1.ControlID = linkBtn.ID
Trigger1.EventName = "Click"

Answer: i make that in page_load, it seems to work

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AJAX :: Updatepanel Control / Drag Updatepanel On Asp Page It Is Not Resizable?

Mar 11, 2010

I am currently using a asp.net 2.0 with visual studio 2005.

I am trying to build a web application using ajax.

but when I drag the ajax updatepanel on asp.net page it is not resizable,so how should i put other controls on it?

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AJAX :: Triggers Run Twice

Mar 18, 2010

Triggers run twice


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AJAX :: UpdatePanels W/ Triggers And AutoPosteBack?

Jul 23, 2010

I am fairly new to ASP.NET and just started using UpdatePanels.Here's what I'm trying to accomplish. I have a button which is wrapped up in the UpdatePanel like so:


The following is the mark-up for the textbox which is supposed trigger an update when its text changes:

With the current set-up, the button's text doesn't change when the textbox content changes. At first I suspected that the reason it didn't modify button's text was because I didn't set AutoPostBack to true on the textbox (tried enabling and it didn't work though),
but then I why would I want to? I'm not getting any data from the server - I just want to update a button on the client side.

I'd really appreciate if you could point out what I'm doing wrong and maybe also clarify when AutoPostBack is absolutely necessary and what are some of the special cases in which it needs to be used.

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AJAX :: What Is Role Of Scriptmanager Control And Updatepanel Control

Jan 7, 2010

What scriptmanager control and

updatepanel control role if we add this control to web page

and when we use triggers with update panel control.

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AJAX :: ASyncFileUpload Not Triggers UploadError In Chrome?

Jan 11, 2011

The aSyncFileUpload control does not trigger the UploadError (javascript) in Chrome. It does, however, work in IE and Firefox.


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Using IE 7.0 And Updatepanel Control For AJAX ?

Jan 19, 2010

I get following error when I click on the button.I am Using IE 7.0 and Updatepanel control for AJAX in the aspx page (Not in master Page).This error goes After I clear cache.

"Sys.WebForms.PageRequestManagerParserErrorException: The message received from the server could not be parsed. Common causes for this error are when the response is modified by calls to Response.Write(), response filters, HttpModules, or server trace is enabled. Details: Error parsing near ' <!DOCTYPE html PUB'."

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Web Forms :: Setting Visible Attribute On PlaceHolder Control Triggers?

Feb 22, 2011

I have a web form with an Asp.net PlaceHolder control. By default the control is set to visible false and will be displayed through the code behind based on several criteria. In general this PlaceHolder control wraps several other Asp.net controls. Now a new requirement ask that the controls within the PlaceHolder control be visible at all times an no longer hidden. So in the Aspx code I changed the laceHolder attribute and set it to visible. Now all kinds of Java Script validation errors are occuring and it is a horrible spahgetti code nightmare. Is their a way to set the visible attribute on the control and not have it trigger the validation?

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Fileupload Control Does Not Work Under Update Panel Unless Use Postback Triggers

Apr 29, 2010

I am using .net 3.5 framework. I have a Tabcontainer inside that I have place asp.net fileupload control which is inside update panel. It's been known fact that fileupload control does not work under update panel unless we use Postback Triggers.



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AJAX :: Bug In UpdatePanel Containing A Control That Has Javascript?

Apr 23, 2010

I cannot determine why this is happening, but I have narrowed it down to the javascript in one of the controls in an updatepanel.

ASP.NET 2.0 aspx structure:

A formview contains a large updatepanel. The updatepanel contains all the controls on the page. Only three controls are autopostback=true: two dropdowns and a checkbox.

The last three controls in the updatepanel are textboxes. Their autopostback=false. Each textbox has an anchor whose javascript launches a pop-up calendar window. The pop-up calendar selection populates the corresponding textbox. No problems there.

The bug happens whenever I fill in all three dates at once (I launch the calendar three times and select a date each time), and then I click Save. The form's save action fails because the code can no longer get to the controls in the formview. The formview.controls.count is zero.

It works if I fill in any two of the three dates *or* I fill in all three dates by typing the values into the textboxes (bypassing the pop-up calendar). I can fill them in random order, and any one or two are fine, but all three at once triggers the error.

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AJAX :: Creating More Than 1 Control Using UpdatePanel?

Jan 30, 2010

I have an UpdatePanel with PlaceHolder inside.

I have a linkbutton "One more", which have to create a new FileUpload control when user clicks it.




how should I make an ability to upload non-defined number of photos?

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AJAX :: Exclude Control From UpdatePanel?

Mar 5, 2011

On my MasterPage I use UpdatePanel to update whole ContentPlaceHolder. Example of code you can find below. All content pages work fine with this MasterPage except one. This page is very complex. I noticed that when I disable UpdatePanel in my MasterPage this problematic page works fine. Question: is it possible to exclude something from UpdatePanel - in my example whole page but only this one?


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AJAX :: Updatepanel And Timer Control?

Mar 25, 2010

My popup panel is disappearing everytime the timer ticks in an updatepanel.How can i solve this problem please friends.

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AJAX :: Don't Update Control Within UpdatePanel?

Apr 14, 2010

This sounds weird, but I would like to NOT update a control that's within an update panel. Is this possible? basically the way facebook works, facebook controls are rendered on a "get" command. but I have controls within the same update panel that cause AJAX postbacks. When the postback's happen, I lose my facebook server-side controls. I am wondering if I can "unregister" a control from an update panel? Or do I just have to redesign that page.

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AJAX :: If Dd2 Triggers The Postback Both Dropdowns Get Disabled But Only Dd2 Gets Enabled Back

Mar 8, 2010

I've got a bit of a problem UpdatePanelAnimationExtenders. Here's an example of the code structure I have:


Now here's my problem. When dd1 triggers the postback both dd1 and dd2 get disabled (instead of just dd1) and after the request is complete only dd1 gets enabled back. The behaviour is also true the other way around (if dd2 triggers the postback both dropdowns get disabled but only dd2 gets enabled back). I'm not really sure what to make of this.

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AJAX :: User Control Inside Updatepanel?

Sep 14, 2010

I have a custom control created to autofill the box as typed in. Its working great. But if I put the control inside an Update Panel, it works for the full postback but if partial postback happens (because of the update panel), it does not work.

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