How to add captcha like 1+3=4?

Refer Below

http://www.dotnetlearners.com/blogs/view/6/create-your-own-captcha-image-generator-in-aspnet-using-c-net.aspx

https://www.aspsnippets.com/Articles/Create-Captcha-Image-with-Refresh-Button-in-ASPNet.aspx

http://www.aspdotnet-suresh.com/2013/09/create-captcha-with-refresh-button-in-aspnet.html

http://demos.telerik.com/aspnet-ajax/captcha/examples/refreshimage/defaultcs.aspx

+1

You can use CaptchaMVC dll

Follow this step by step..

http://www.c-sharpcorner.com/UploadFile/bd8b0b/how-to-implement-captcha-in-Asp-Net-mvc/.

+2

Hi Sunil,

the logic is very simple,

create 10 captcha images and store it to db with ID and value for this captcha,

If ex : img 1 has like 3+1 ,make its value as 4

show the img in page and get the id of img and get the value for that particular id,

check whether the user entered value and the img value same or not.....

img table like

img id img value

1 image 4

+1