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     Overview - Captcha
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 End-User Documentation
View this topic on docs.devexpress.com (Learn more)

Overview - Captcha

The Captcha is a CAPTCHA component used to verify that data is submitted by a human, and not a robot or script.

Expanded Implementation Details

Captcha is realized by the CaptchaExtension class. Its instance can be accessed via the ExtensionsFactory.Captcha helper method, which is used to add a Captcha extension to a view. This method's parameter provides access to Captcha settings implemented by the CaptchaSettings class, allowing you to fully customize the extension.

Captcha's client counterpart is represented by the ASPxClientCaptcha object.

Expanded Declaration

Captcha can be added to a project in the following manner.

View code ("Index.cshtml"):

Partial View code ("_CaptchaPartial.cshtml"):

Known Limitations

The Partial View should contain only the extension's code.

The CaptchaExtension.GetIsValid static method is used in the Controller code to check whether the entered code is valid.

Controller code ("HomeController"):

The code result is demonstrated in the image below.

Expanded See Also

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