XsltListViewWebPart with search filter c#

Hi there am creating a .net usercontrol which will have XsltListViewWebPart to look at Views for a list item using c# code .This has been a sucess . Now I am going to put a textbox and a search button . The search button will render XsltListViewWebPart with the result of the textbox criteria of the view bound.

I am a bit unsure how to do this . The only way is to get all the caml for all the views and then using logic to construct a further view criteria. 

There must be a way to do this without using Sharepoint designer.

Cheers