captcha fails on modal popup

[sa]

hi all,

i have a problem with captcha control when i use it on a modal popup. validation always fails. there is no problem with pages but when i use captcha control in a panel which opens by an ajaxmodalpopupextender, myCaptcha.IsValid always returns false. any idea would be appriciated

thanks.

[Pero]

Hello,

Is the Ajax modal popup extender making an ajax call before showing the RadCaptcha control? When an AJAX request is fired, the server-side page goes through its full page lifecycle. This means that a new RadCaptcha code will be generated, but because it's an AJAX update it would not be shown on the image (the old code is still shown because the RadCaptcha is not affected by the partial page update). So, the user sees the old code and enters it correctly but still gets an Error Message, because this old code is not valid anymore.

To overcome this, you should place the RadCaptcha control into an UpdatePanel with UpdateMode = Always. This way you can be sure the captcha has the latest code displayed.

All the best,
Pero
the Telerik team