How do I maintain a Viewbag for all Controllers?

Question

I am developing in ASPNET MVC 4 with Razor.

I made the login page and everything is ok.

After login, the famous phrase "Welcome FLAVIO" is being successfully returned, via Viewbag.

As I’m doing a redirect, so I’m doing it this way, in Action Logon:

User user = _repository.AutenticarUsuario(f["username"], f["password"]);
TempData["usuario"] = user.fname;
return Redirect("/Home/Index");

At VIEW /Home/Index, I have this code:

ViewBag.user = ViewBag.usuario;

And then the user name is being successfully displayed.

The problem is that if I enter some other link in the system, the user name goes to space!

How do I make the user name persist for all actions?

Answer 1

Make a ActionFilter:

public class MeuActionFilter : ActionFilterAttribute, IActionFilter
{
    void IActionFilter.OnActionExecuting(ActionExecutingContext filterContext)
    {
        ViewBag.User = // coloque aqui a informação do usuário

        this.OnActionExecuting(filterContext);
    }
}

Then just mark the Controller:

[MeuActionFilter]
public class MeuController : Controller
{
    ...
}

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