Excel download restriction

Hi.

First write an ajax call and from that call a method in server side and in server side use these below links to get the size,

 

https://www.kunal-chowdhury.com/2015/12/retrieve-file-size.html

 

https://www.c-sharpcorner.com/blogs/get-file-size-before-downloading-using-webclient1

 

https://www.dotnetperls.com/fileinfo-length

 

after this return the size and in ajax call you will hit to success function and there you can check condition whether the size greater than 50mb then show alert otherwise allow user to download. thanks.