How to create dynamic control in MVC Application?

You could make an ajax call from a jquery statement in javascript .  Pass it the URL statement you want to call for the method in your controller.  Your controller can pass back a view of raw html
 
and in the success:  section of the $.ajax call,    inject the raw html returned from the controller  into a div statement.
The controller can construct the html dynamically through a string using JQuery's html() extension. 
What you return in the controller could be a TextBox or DropDownList