It's possible, but it's not easy.
An option, if you want to keep queries dynamic is to use an ORM such as Entity framework. Be aware that if it's not handled correctly it will lead to performance problems.
Luis C.
General Disclaimer:
Are you seriously taking the advice and code from someone from the internet without testing it? Do you at least understand it? Or can it easily kill your server?
How to post data/code on a forum to get the best help: Option 1 / Option 2