how to change host web url from sharepoint provider hosted app - sharepoint-2013

Question

I want to change url of host web from provider hosted app.
Basically, after completion of some business logic in my provider hosted app, I want to navigate to another page of SharePoint portal (for example the search-center page).
When I do "response.redirect" or "window.location.href" it is loading within the App iframe. I want to load the same page in main window.
Please suggest.
Updating with my logic
I have a generic method to get List home page url
public string ListHomePage(ClientContext clientContext, string listName)
{
Web spWeb = clientContext.Web;
clientContext.Load(spWeb, web => web.Url);
clientContext.ExecuteQuery();
return TokenHelper.GetAppContextTokenRequestUrl(spWeb.Url, HttpContext.Current.Server.UrlEncode(spWeb.Url + "/Lists/" + listName));
}
and I am calling following code in App page.
Response.Redirect(ListHomePage(clientContext1, "Test ListName"));

Answer 1

The same can be achieved using below code as the AppPart loads inside a iframe
string redirectUrl = ListHomePage(clientContext1, "Test ListName");
string script = "<script type='text/javascript'>window.parent.location.href = '" + redirectUrl + "'; </script>";
//Here I am using Telerik ScriptManager to execute script
RadScriptManager.RegisterStartupScript(this, this.GetType(), "Load", script, false);