Postback and RegisterForEventValidataion

[SECSteve]

I am working with a radio button group. Depending on the seleciton panels
and controls will show/hide. I keep getting an Invalid Postback or Callback
argument. I have tried registering the values that I am using in render()
with ClientScript.RegisterForEventValidation but it is not working.

The buttong group only has 2 choices. At load choice #1 is selected. I can
select #2 and the proper events happen. However, if I go back to choice #1
I get the error. I have not found a satisfactory solution on the web.

Any ideas?

 

[Guest]

Here's a little more info that might help. All of these controls are in an
update panel. 1 of the controls that appears during the SelectedIndexChaned
event of the radio button is a drop down that is populated from a database.
If I comment out the code that populates the drop down everything works ok,
I don;t get the error.

This makes me thingk that I have to use the render()
ClientScript.RegisterForEventValidation for every value in that drop down.

How do I do that for a dynamically populated control???

Is there a better way, somethging that I am missing? After all, I am pretty
new to this.


Thanks.

 

[Teemu Keiski]

Hello,

DropDownList should register it's values for event validation already. Is it
sure that you aren't databinding it on every request?

Could you provide a relevant snippet of your code (feel free to email me
directly), so I can take a look at it.

 

[Walter Wang [MSFT]]

Hi SECSteve,

Welcome to MSDN Managed Newsgroup!

Without complete code listing, my wild guess of your issue is the same as
described in this blog:

#Joe Stagner - Frustrated by Design ! : ASP.NET AJAX Postback Event
Validation
http://blogs.msdn.com/joestagner/archive/2007/08/14/asp-net-ajax-postback-ev
ent-validation.aspx

For AJAX Postback event validation, you're right that you need to call
RegisterForEventValidation for each value in the DropDownList, even they're
retrieved from the database.

Please feel free to let me know if I've misunderstood anything.


Sincerely,
Walter Wang ([email protected], remove 'online.')
Microsoft Online Community Support

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[Walter Wang [MSFT]]

Hi SECSteve,

I'm wondering if you have seen my last reply. Our policy is to follow-up
each post within 48 business hours and we need to confirm with customer
before closing a post. Since I don't have complete information for your
question, my last reply asked for more information. Would you please let me
know more about your question? Thanks.


Regards,
Walter Wang ([email protected], remove 'online.')
Microsoft Online Community Support

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