Captcha in ASP.NET

The idea of \u200b\u200ba CAPTCHA is to protect the site from spammers who use web bots when registering new accounts, send comments via web forms, etc. The user is shown a picture with distorted text (for protection of optical character recognition). Most users will easily be able to recognize distorted text and enter it to confirm, and the program - no.


Using the code


ZIP file contains the source code of a class of two web forms. Simply create a new project and insert these elements.


Files


• CaptchaImage.cs - describes the object CapchaImage, which creates the image.

• Default.aspx, Default.aspx.cs - examples of web forms.

• JpegImage.aspx, JpegImage.aspx.cs - web form designed to display JPEG images rather than HTML.