Doubt with Routes in Asp.net mvc

Question

When creating a Controller a :

public ActionResult Index()
    {
        return View();
    }

But in this Controller, if you have a new Action if a parameter is required, if the user tries to open this link it will generate an error. Is there any way to avoid this error when 'View' is sending a parameter this way:

foreach (var item in Model)
    {
        <a href="/Relatorios/ListaSelecionado/@item.IDJOGOCAIXA" class="list-group-item">
           Número :  @Html.DisplayFor(c => item.IDJOGOCAIXA) - 
        </a>

    }


public ActionResult ListaSelecionado(int id)
   {
        return View();
   }

Error:

Answer 1

But in this Controller, if you have a new Action and you need a parameter, if you try to open this link, you will get an error. Is there any way to avoid this mistake?

I don’t understand what you mean by that, but if you don’t send the parameter to Action, will make a mistake anyway.

If we’re talking about a method like this,:

public ActionResult ListaSelecionado(int id) { ... }

A course like this is expected:

http://teste:12345/MeuController/ListaSelecionado/1

This considering that your method is GET. If it is POST, id shall be completed only if the shipment is made from a form containing a <input> called id, or the request has in the data body a field called id.

---

EDIT

Note that the error you are having clearly states that the Action is asking for an integer parameter called id on the route. Therefore, access:

http://teste:12345/MeuController/ListaSelecionado/

It’ll be a mistake, because id is not filled in. Now, if you pass any number after ListaSelecionado/:

http://teste:12345/MeuController/ListaSelecionado/234

It will work, as much as Id does not exist.