How to receive information in a View?

Question

I programmed my controller as follows:

[HttpPost]
public ActionResult Login(string pUsuario, string pSenha)
{
     usuario oUsuario = modelOff.usuarios.Where(p => p.usuario1 == pUsuario && p.senha == pSenha).SingleOrDefault();
     if (oUsuario == null)
         return View("nao");
     else
         return View(oUsuario.usuario1);
}

I check if the user exists, if it exists send his name to view, if it does not exist, send nao.

I want to know how to show this information on view.

My view:

@{
    ViewBag.Title = "Login";
}

<h2>Olá Fulano</h2>

Answer 1

Hello, There are several ways to pass data to View one of them is this:

ViewBag is a variable that loads information to the view, and Message is a key where you will put a value, IE, can create other names as in this example here:

There is also a variable called ViewData which has the same purpose, this is typed as a dictionary containing objects, in the example below we can see in more detail:

There are other ways of passing data, but I think the ones I mentioned solve your problem.

Answer 2

For your case probably a simple viewBag should fit:

[HttpPost]
public ActionResult Login(string pUsuario, string pSenha) {
     usuario oUsuario = modelOff.usuarios.Where(p => p.usuario1 == pUsuario && p.senha == pSenha).SingleOrDefault();
     ViewBag.usuario = oUsuario == null ? "nao" : oUsuario.usuario1;
     return View();
}

View:

//precisa colocar onde está o modelo aqui, mas na pergunta não tem a localização
@{
    ViewBag.Title = "Login";
}

<h2>Olá Fulano @ViewBag.usuario</h2>

You can do it another way too:

[HttpPost]
public ActionResult Login(string pUsuario, string pSenha) {
     usuario oUsuario = modelOff.usuarios.Where(p => p.usuario1 == pUsuario && p.senha == pSenha).SingleOrDefault();
     ViewBag.usuario = oUsuario == null ? "nao" : oUsuario.usuario1;
     return View((object)(oUsuario == null ? "nao" : oUsuario.usuario1));
}

View:

@model string
@{
    ViewBag.Title = "Login";
}

<h2>Olá Fulano @Model</h2>

I put in the Github for future reference.

There are other ways.