Tab
A newer version of this page is available. Switch to the current version.

ASPxCaptcha Class

A control used for the challenge-response authentication.

Namespace: DevExpress.Web

Assembly: DevExpress.Web.v18.2.dll

Declaration

public class ASPxCaptcha :
    ASPxWebControl,
    IRequiresLoadPostDataControl
Public Class ASPxCaptcha
    Inherits ASPxWebControl
    Implements IRequiresLoadPostDataControl

Remarks

The ASPxCaptcha class implements the functionality of a challenge-response authentication test, which enables verifying that submitted data came from a human, and not a robot or script.

ASPxCaptcha-Class

NOTE

The ASPxCaptcha control uses a session state to store a verification code. Therefore, the session state mode attribute should not be Off for the control to operate properly.

The control consists of the following elements:

NOTE

The ASPxCaptcha control provides you with comprehensive client-side functionality, implemented using JavaScript code (see DevExpress.Web.Scripts to learn more):

The control's client-side API is enabled if the ASPxCaptcha.ClientInstanceName property is defined, or any client event is handled.

See Also