Progress Telerik UI for ASP.NET MVC
ASP.NET MVC Captcha
- The Telerik UI for ASP.NET MVC Captcha is an intuitive verification component used to prevent malicious software from bypassing authentication and accessing important data. It comes with audio, built-in validation, RTL support, keyboard navigation and more.
- This control is part of the Telerik ASP.NET MVC suite along with 110+ full-featured UI components, designed to build rich & responsive web apps for any device twice as fast.
- Achieve fast meaningful results with our detailed documentation, live demos, online technical trainings & outstanding support team.
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Overview
The Telerik UI for ASP.NET MVC Captcha is a smart verification component that serves as a security validator. It is used to protect your application from program or bot logins/submissions and ensure that a human is trying to access the information in your application. The control comes with built-in validation, Captcha Audio and can be easily integrated with the Form component.
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Validation
The ASP.NET MVC Captcha component features built-in validation. Always generate the Captcha and apply validation on the server-side of your application as this helps prevent malicious software from bypassing the verification. Once the user inputs the values and prompts verification, a validation message is displayed depending on the success or failure of the verification.
See the Captcha Validation Messages in this demo
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Integration with Form Component
The Captcha control can be easily integrated into the ASP.NET MVC Form component to prevent any non-human logins and submissions. If the validation is not successful, the form will not be submitted and the input will be ignored. -
Captcha Audio
The ASP.NET MVC Captcha component comes with an audio option to satisfy the needs of all users. When activated, it reads out loud the symbols in the image using the NATO phonetic alphabet. For this purpose, an audio button is rendered by default next to the Captcha. Once the user activates the audio, a slider will appear allowing them to adjust the volume.
Try out the Telerik UI for ASP.NET MVC Captcha Audio feature -
Events
The Telerik UI for ASP.NET MVC Captcha fires several events, including:
- Change Event: fired when the input is changed
- Request Start Event: fired when the component makes a request to a handle
- Request End Event: fired when the request to the handler is finished
The requests to the handler include Captcha refresh, Captcha audio and Captcha Validation.
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API
The Telerik UI for ASP.NET MVC suite comes with a complete server-side API. You can configure the Captcha component with simple API calls and since the server wrappers output JavaScript, you can also have full access to the client-side API for maximum control in the browser.
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RTL Support
Right-to-left support is available for language scripts like Hebrew and Arabic, in which users read from right to left. You can satisfy any cultural preference with the Captcha component by toggling between left-to-right and right-to-left alignment with only a few settings.
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Accessibility
The Captcha component is Section 508 and WCAG 2.1 compliant. It is adapted to satisfy the needs of all users as it also comes with a built-in audio feature.
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Keyboard Navigation
The Captcha component is one of the many components in the Telerik UI for ASP.NET MVC suite with out-of-the-box keyboard navigation support. It allows users to easily navigate it and use different keyboard buttons to refresh the image, focus on the textbox, prompt validation, etc.
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Captcha Theming
The ASP.NET MVC Captcha validation component has multiple built-in themes and swatches. Explore the Default (our own styling), Material (based on the Material Design guidelines), Bootstrap (which looks like the Bootstrap styling to integrate better) and Fluent (based on Microsoft Fluent UI) themes and choose the swatch that best meets your design requirements. You can easily customize any theme with a few lines of CSS or create a new one to match your colors and branding with the Progress SASS ThemeBuilder application.
Next Steps
See UI for ASP.NET MVC in action and check out how much it can do out-of-the-box.
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