ASP.NET MVC

My biggest questions are why are you not using SoC with the MVC solution and why is the controller doing data access?

https://en.wikipedia.org/wiki/Separation_of_concerns

Why are you using datasets and datatables with a MVC solution, a Web based solution?

https://dzone.com/articles/reasons-move-datatables

MVC issues are addressed at the below forum.

http://forums.asp.net/1146.aspx/1?MVC