How to call an action of a controller from the Layout? [closed]

Question

How to call an action of a controller from the Layout? [closed]

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#1 by (0 votes)

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I have a navbar in my layout, and my idea is to show a number that is the number of shipments (Model) that were made. The issue is that I do not know how I can call that action from my Layout.

Thank you very much !!

SharedFold

        public class SharedController : Controller
        {
            public ApplicaAccContextDB db = new ApplicaAccContextDB();

            public ActionResult _EnviosPendientes()
            {
               return PartialView("_EnviosPendientes", db.Envios.ToList());
            }
        }

(Partial view) _EnviosPendientes:

  @model IEnumerable<ApplicaAccWeb.Models.EnviosFold.Envios>

  @{ 
      int i = 0;
  }

  @foreach (var item in Model) {
      if (item.Estado == false)
      {
          i++;
      }
  }

  @i

_Layout:

    <div class="navbar-collapse collapse collapser pull-right">

                <!--Tabla con botones mas inicios-->
                <ul class="nav navbar-nav navbar-left" style="padding-right:15px">
                    <li style="padding:8px">
                        <button onclick="location='../Envios/EnviosPendientesLista/'" target="_blank" class="btn btn-danger">
                            Envios <span class="badge">@Html.Partial("_EnviosPendientes")</span>
                        </button>
                    </li>
                    <li style="padding:8px">
                        @*Obtener ID de usuario y pasarlo por parametros*@
                        <button onclick="location='SharedFold/MensajesLista/'+3"  class="btn btn-warning" type="button" data-toggle="modal" data-target="#myModal">
                            Mensajes <span class="badge"></span>
                        </button>    
                    </li>
                    <li>
                        @Html.Partial("_LoginPartial")
                    </li>
                </ul>

            </div>

asp.net-mvc-5

asked by Joaquin Ferrari 26.04.2017 в 18:35

source

1 answer

How to make a connection to MySql? Problem when referencing WCF web service from MVC app

score 0 · Accepted Answer

I can not prove it for now, but the first solution I can think of is to use the collection Items of current context :

public class SharedController : Controller
{
    public ApplicaAccContextDB db;

    public SharedController()
    {
        db = new ApplicaAccContextDB();
        System.Web.HttpContext.Current.Items["EnviosPendientes"] = db.Envios.ToList();
    }

    ...
}

and use it in the Layout as follows:

@Html.Partial("_EnviosPendientes", (List<ApplicaAccWeb.Models.EnviosFold.Envios>)Context.Items["EnviosPendientes"])

EDIT

According to your comment, then better try with sections :

In _Layout.cshtml

<div class="navbar-collapse collapse collapser pull-right">

    <!--Tabla con botones mas inicios-->
    <ul class="nav navbar-nav navbar-left" style="padding-right:15px">
        <!-- Ojo: aquí es donde ocurre la magia -->
        @RenderSection("ViewData", required: false)
        <li style="padding:8px">
            @*Obtener ID de usuario y pasarlo por parametros*@
            <button onclick="location='SharedFold/MensajesLista/'+3" class="btn btn-warning" type="button" data-toggle="modal" data-target="#myModal">
                Mensajes <span class="badge"></span>
            </button>
        </li>
        <li>
            @Html.Partial("_LoginPartial")
        </li>
    </ul>
</div>

On your controller / action:

public ActionResult Envios()
{
    ...
    ViewBag.EnviosPendientes = db.Envios.ToList();
    return View();
    // O
    ViewData["EnviosPendientes"] = db.Envios.ToList();
    return View();
    // O
    return View(db.Envios.ToList());
}

In the view:

@* Depende de cómo lo mandes, si usas un *@
@model IEnumerable<ApplicaAccWeb.Models.EnviosFold.Envios>
@* Tu contenido *@
@section ViewData{
    @{
        int i = 0;
        // O lo obtienes con
        var _lista = (List<ApplicaAccWeb.Models.EnviosFold.Envios>)ViewBag.EnviosPendientes;
        // O
        var _lista = (List<ApplicaAccWeb.Models.EnviosFold.Envios>)ViewData["EnviosPendientes"];

        foreach (var item in _lista)
        {
            if (!item.Estado)
            {
                i++;
            }
        }
    }
        <li style="padding:8px">
            <a href="../Envios/EnviosPendientesLista/" target="_blank" class="btn btn-danger">
                Envios <span class="badge">@i</span>
            </a>
        </li>
}

And so, in each view you adapt the ViewData section according to the needs of each view, which you can include or not in the Layout.