Solved

I want to use a Trigger event for an Update Panel that is being bound by a repeater, error: The ControlID property must be set on the trigger in UpdatePanel

Posted on 2008-11-03
10
1,145 Views
Last Modified: 2012-05-05
I have a Repeater that I am creating on Page_Load() that is creating a bunch of ImageButtons that have a OnClick function.  When they click the Image I want it to update a panel to perform the OnClick function of the ImageButton.    What is happening though is I am getting a: The ControlID property must be set on the trigger in UpdatePanel.   Any help would be appreciated.  Thanks
0
Comment
Question by:higginsonline
  • 6
  • 4
10 Comments
 
LVL 18

Expert Comment

by:David Robitaille
ID: 22867069
i got dificulty to understant what you mean, but here my advice.
dont put any trigger on the update panel, keep it conditional = true (a chlidrenastrigger false)
on the OnClick function, use the updatepanel.update() function to "trigger" the update
0
 

Author Comment

by:higginsonline
ID: 22867219
Okay so far my updatePanel I now have:

 <asp:UpdatePanel ID="UpdatePanel1" UpdateMode="Conditional" runat="server" ChildrenAsTriggers="false">
        <ContentTemplate>
       
        </ContentTemplate>
    </asp:UpdatePanel>

And for my code behind I have:
    Public Sub setClick()
        test.Text = "yup"
        UpdatePanel1.Update()
    End Sub

Is this what you mean?
0
 
LVL 18

Expert Comment

by:David Robitaille
ID: 22867239
yes
but "test" label or textbox should be inside your ContentTemplate...
0
 

Author Comment

by:higginsonline
ID: 22867287
Oops, yes indeed it should.   I am getting this error when I run it and click on the Link...

Invalid postback or callback argument.  Event validation is enabled using <pages enableEventValidation="true"/> in configuration or <%@ Page EnableEventValidation="true" %> in a page.  For security purposes, this feature verifies that arguments to postback or callback events originate from the server control that originally rendered them.  If the data is valid and expected, use the ClientScriptManager.RegisterForEventValidation method in order to register the postback or callback data for validation.

I do not want to turn Off my Event Validation though for this to work.... any suggestions?
0
 
LVL 18

Expert Comment

by:David Robitaille
ID: 22867345
well, it<s because you "created" the images buttons in the Page_Load.
  1. test, if you remove the avlidation, just to make sure it works without it, then pput it back
  2. check if you could "build" your repeater an other way. if your reapeter is declared on the aspx page and is only "binded" on page load, it should work.
0
Top 6 Sources for Identifying Threat Actor TTPs

Understanding your enemy is essential. These six sources will help you identify the most popular threat actor tactics, techniques, and procedures (TTPs).

 
LVL 18

Expert Comment

by:David Robitaille
ID: 22867356
avlidation = EventValidation
0
 

Author Comment

by:higginsonline
ID: 22867364
You were correct again I just put a If Not IsPostBack around the repeater.... and it works to some extent.

The OnClick function is refreshing the the whole page and not just my UpdatePanel section..
0
 
LVL 18

Accepted Solution

by:
David Robitaille earned 500 total points
ID: 22867553
well, i suse the update in a different contex, the image button trigger a postback...
I just made test and  you could trigger a AsyncPostBackTrigger for the whole repeater with this Trigger : (i think you dont need to use update function with that, but i<m not that sure)
<Triggers>
<asp:AsyncPostBackTrigger ControlID="repeaterName" />
</Triggers>
0
 

Author Comment

by:higginsonline
ID: 22867572
That worked perfectly.. Thank you for allllll your help :)
0
 
LVL 18

Expert Comment

by:David Robitaille
ID: 22867603
it was a pleasure, thanks for the grade, and next time add Ajax in your Zones.
0

Featured Post

How your wiki can always stay up-to-date

Quip doubles as a “living” wiki and a project management tool that evolves with your organization. As you finish projects in Quip, the work remains, easily accessible to all team members, new and old.
- Increase transparency
- Onboard new hires faster
- Access from mobile/offline

Join & Write a Comment

Suggested Solutions

IntroductionWhile developing web applications, a single page might contain many regions and each region might contain many number of controls with the capability to perform  postback. Many times you might need to perform some action on an ASP.NET po…
The ECB site provides FX rates for major currencies since its inception in 1999 in the form of an XML feed. The files have the following format (reducted for brevity) (CODE) There are three files available HERE (http://www.ecb.europa.eu/stats/exch…
Access reports are powerful and flexible. Learn how to create a query and then a grouped report using the wizard. Modify the report design after the wizard is done to make it look better. There will be another video to explain how to put the final p…
This video gives you a great overview about bandwidth monitoring with SNMP and WMI with our network monitoring solution PRTG Network Monitor (https://www.paessler.com/prtg). If you're looking for how to monitor bandwidth using netflow or packet s…

708 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

16 Experts available now in Live!

Get 1:1 Help Now