I want to implement a smart search filter in my project, I already bulit a smart search box connected to a searchResults page, but now I want to add more options to filter these results. I am not using a web part structure so I have to implement this functionality in visual studio as a controller in aspx page. I could'nt find any example on how to do this. Can you please explain the process? or at least provide me with links where I can find examples?
also please note that I m not able to add it as a webpart directly from Kentico, I want to implement it in visual studio programatically