The Captcha Provider

This article explains how to setup the server-side provider for the Telerik UI Captcha for ASP.NET MVC. The provider generates and validates CAPTCHAs via helper classes and methods.

Setup

The server-side Telerik UI Captcha provider comes with the Telerik.Web.Captcha.dll. To include the dll in your project:

1. In your project, right-click References.
2. Select Add Reference...
3. Click Browse....
4. Navigate to the installation folder of the Telerik UI for ASP.NET MVC. The dll is located in the ~/installationFolder/captcha/net40 directory.
5. Select Telerik.Web.Captcha.dll and click Add.

In the C# backend file or controller, add references to the following namespaces:

    using System;
    using System.Drawing.Imaging;
    using System.IO;
    using System.Web.Mvc;
    using Telerik.Web.Captcha;

For more information about the usage and integration of the Captcha provider in an ASP.NET MVC application, see the Validation article.

See Also

• Basic Usage of the Captcha HtmlHelper for ASP.NET MVC (Demo)

• Using the API of the Captcha HtmlHelper for ASP.NET MVC (Demo)

• Server-Side API