how to change page content type at runtime in MVC?

Question

hi,

I am working in asp.net MVC & on the view has to show both json & xml content depending on some condition.

I have to change the content type of the page at runtime ie,

if the condition for json is fulfilled then set page contenttype = "text/json"

&

if the condition for xml is fulfilled then set page contenttype = "text/xml".

I have tried setting default content type on view as <%

@ Page Language="C#" Inherits="System.Web.Mvc.ViewPage" ContentType="text/json"%>

& in controller class if xml condition is fulfilled then chnage it like :

this.Response.Clear;

this.Response.ContentType = "text/xml";

BUT it didn't work for me .

please let me know how can i do that.

thanks in advance