ASP.NET CAPTCHA: Lanap.BotDetect.Captcha Class (BotDetect v2.0; deprecated)

documentation > asp.net captcha> api reference

Please Note

The information on this page is out of date and applies to a deprecated version of BotDetect™ CAPTCHA (v2.0).

An up-to-date equivalent page for the latest BotDetect Captcha release (v3) is BotDetect v3 ASP.NET Captcha API reference.

General information about the major improvements in the current BotDetect release can be found at the What's New in BotDetect v3.0 page.

BotDetect ASP.NET CAPTCHA is implemented as the Captcha class, an ASP.NET Custom Web Control that creates and validates image and sound CAPTCHAs.

Public Instance Constructors
	Captcha	Initialize a new instance of the Lanap.BotDetect.Captcha class

Public Instance Properties
	CaptchaImageAltText	Custom alt text of the CAPTCHA image. The default alt text used is "CAPTCHA code image".
	CodeLength	Length (number of characters) of the random code used for CAPTCHA generation. The default length is 5 characters.
	CodeType	The type of random code used for CAPTCHA generation. Valid values are members of the CodeTypeEnum Enumeration. The default value is CodeTypeEnum.AlphaNumeric.
	ImageEnabled	A flag indicating should the CAPTCHA image be rendered. True by deafult.
	ImageFormat	The image format in which CAPTCHA images will be rendered. Valid values are members of the ImageFormatEnum Enumeration. The default value is ImageFormatEnum.Jpeg.
	ImageSize	Size of the CAPTCHA image rendered (in pixels). The default value is (250, 50).
	ReloadEnabled	A flag indicating should the image reload button be rendered with the control. True by deafult.
	ReloadIconAltText	Custom alt text of the CAPTCHA reload icon. The default alt text used is "Change the code".
	SoundEnabled	A flag indicating should the link to the audio CAPTCHA be rendered with the control. True by deafult.
	SoundIconAltText	Custom alt text of the CAPTCHA sound icon. The default alt text used is "Speak the code".
	TextStyle	The text style (distortion algorithm) used for CAPTCHA image generation. Valid values are members of the TextStyleEnum Enumeration. The default value is TextStyleEnum.Chalkboard.

Public Instance Methods
	Validate string code	Compares the code sent by argument with the code used to generate the CAPTCHA instance that is being validated.

Public Static Methods
	Validate string code string captchaID string instanceID	A static variant of the Validate method, allowing easier integration with various Ajax and MVC frameworks.