public ActionResult Alterar(int txtItemCarrinhoId, int txtQtde, string btnSubmit)
{
if (!CarrinhoAny)
{
ErroMessage = "Carrinho Vazio";
return(RedirectToAction("Index", "Home"));
}
if (btnSubmit == "alterar")
{
Carrinho.AlterarItemCarrinho(txtItemCarrinhoId, txtQtde);
}
if (btnSubmit == "remover")
{
Carrinho.RemoverItemCarrinho(txtItemCarrinhoId);
}
return(RedirectToAction("Index"));
}