Log In
Home
Support
Demos
Documentation
Blogs
Training
Webinars
[Expand]General Information
[Expand]WinForms Controls
[Collapse]ASP.NET Controls and MVC Extensions
 [Expand]Prerequisites
 [Expand]What's Installed
 [Expand]Common Concepts
 [Expand]ASP.NET WebForms Controls
 [Collapse]ASP.NET MVC Extensions
  [Expand]Product Information
  [Expand]Getting Started
  [Expand]Common Concepts
  [Expand]Grid View
  [Expand]Card View
  [Expand]Vertical Grid
  [Expand]Spreadsheet
  [Expand]Rich Text Editor
  [Expand]HTML Editor
  [Expand]Image and Data Browsing
  [Expand]Docking and Popups
  [Expand]Navigation and Layout Extensions
  [Expand]File Management
  [Expand]Multi-Use Site Extensions
  [Expand]Charts
  [Expand]Pivot Grid
  [Expand]Scheduler
  [Expand]Tree List
  [Collapse]Data Editor Extensions
    Editor List
    Main Features
   [Expand]Common Concepts
   [Collapse]Editor Types
    [Expand]BinaryImage
    [Expand]Button
    [Expand]ButtonEdit
    [Expand]Calendar
    [Collapse]Captcha
      Overview - Captcha
      Captcha Main Features
     [Expand]Visual Elements
    [Expand]CheckBox
    [Expand]CheckBoxList
    [Expand]ColorEdit
    [Expand]ComboBox
    [Expand]DateEdit
    [Expand]DropDownEdit
    [Expand]GridLookup
    [Expand]HyperLink
    [Expand]Image
    [Expand]Label
    [Expand]ListBox
    [Expand]Memo
    [Expand]ProgressBar
    [Expand]RadioButton
    [Expand]RadioButtonList
    [Expand]SpinEdit
    [Expand]TextBox
    [Expand]TimeEdit
    [Expand]TokenBox
    [Expand]TrackBar
    [Expand]ValidationSummary
   [Expand]Strongly-Typed Editor Types
  [Expand]Report Extensions
  [Expand]SpellChecker
 [Expand]Localization
 [Expand]Redistribution and Deployment
  Get More Help
 [Expand]API Reference
[Expand]ASP.NET Bootstrap Controls
[Expand]WPF Controls
[Expand]Xamarin Controls
[Expand]Windows 10 App Controls
[Expand]Document Server
[Expand]Reporting
[Expand]Report Server
[Expand]Dashboard
[Expand]eXpressApp Framework
[Expand]CodeRush
[Expand]Cross-Platform Core Libraries
[Expand]Tools and Utilities
 End-User Documentation

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"):

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

How would you rate this topic?​​​​​​​