An ASP.NET CAPTCHA Server Control

Hi, thanks for the article; in fact I used your render idea to integrate it into a fully featured control http://www.sharppieces.com/free-aspnet-controls/CaptchaImage.aspx. The control is open source on codeplex, check it out if you have time.

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For windows vista, you have to add:

add name=CaptchaImage path=CaptchaImage.aspx verb=GET type=WebControlCaptcha.CaptchaImageHandler resourceType=Unspecified preCondition=integratedMode /

in handlers section.

Regards,
Asang Dani

Implementation of Custom web control to display CAPTCHA image can be found here:

http://etechplanet.com/post/2009/05/11/Create-CAPTCHA-Image-using-C-and-ASPNet.aspx

Cool stuff, thanks. I’m actually thinking of wrapping this up in a DotNetNuke module, if it’s ok with you.

If you want a simple Captcha in asp.net, check this article: http://www.massimilianobianchi.info/max/20art_A-simple-CAPTCHA-with-ASP-NET.aspx