1) how to check captcha in controller.(write this code to your controller function)
using Capcha.HtmlHelpers;
// Code for validating the CAPTCHA
if (this.CheckCapcha()){
*// do case of capcha is valid*
}
2) how to display captcha in view(write this code to your view)
using Capcha.HtmlHelpers;
@using Capcha.HtmlHelpers; //import this library on top
@Html.Captcha(4) // if you want to display capcha with 4 char. replace 4 to your appropriate number to display n length capcha.
@Html.MathCaptcha() // if you want to display capcha as maths formula like (7+1=?),(2+95=?),etc.
