Setting Header in ASP.NET MVC 4 Controller

Question

I am trying to insert an header in my controller according with the parameter sub , but with no success. I have tried these two lines, here's the code:

public ActionResult Index(string sub)
{
    if (!string.IsNullOrEmpty(sub))
    {
        HttpContext.Response.Headers.Add("sub", sub);
        Response.AddHeader("sub", sub);
    }

    return View();
}

Answer 1

This may work for you..

public ActionResult Index(string sub)
{
    if (!string.IsNullOrEmpty(sub))
    {
        HttpContext.Response.AppendHeader("sub", sub);

    }
return View();
}