How to solve "public action method 'methodActionName' was not found on controller 'controllerNameController'"

Question

I am getting this error

A public action method 'consultaCumplimientoOptometras' was not found on controller 'NovedadesCumplimientosController'.

Here is the whole View called CumplimientoOptometras.cshtml

@{
    ViewBag.Title = "Cumplimiento por Optometras";
    Layout = "~/Views/Shared/_Layout.cshtml";
}

<h2>Cumplimiento por Optometras</h2>

<!-- Resultado de la Consulta de Cumplimientos -->
@Html.Action("consultaCumplimientoOptometras") 

I have the following method in the NovedadesCumplimientosController

[HttpGet]
public PartialViewResult consultaCumplimientoOptometras(String x)
{
    List<CumplimientoOptometraDTO> lstCumplimientosOpts;

    lstCumplimientosOpts = new List<CumplimientoOptometraDTO>();

    return PartialView("_consultaCumplimientoOptometras", lstCumplimientosOpts);
}

Here is the partial view _consultaCumplimientoOptometras.cshtml

@model List<CumplimientoOptometraDTO>

<table border="1">
    <tr>
        <td>Id Opt&oacute;metra</td>
        <td>Nombre Opt&oacute;metra</td>
        <td>Horas Laboradas</td>
        <td>Meta Mensual</td>
        <td>Venta Mensual</td>
        <td>% Cumplimiento</td>
        <td>Valor Comisi&oacute;n</td>
    </tr>

    @foreach (var cumpl in Model)
    {
        <tr>
            <td>@cumpl.idOptometra</td>
            <td>@cumpl.nombreOptometra</td>
            <td>@cumpl.horasLaboradas</td>
            <td>@cumpl.metaMensual</td>
            <td>@cumpl.ventaMensual</td>
            <td>@cumpl.porcentajeCumplimiento</td>
            <td>@cumpl.valorComision</td>
        </tr>
    }
</table>

Here is the CumplimientoOptometraDTO class/model

using System;

public class CumplimientoOptometraDTO
{
    public Int32 idOptometra { get; set; }
    public String nombreOptometra { get; set; }
    public Int32 horasLaboradas { get; set; }
    public Decimal metaMensual { get; set; }
    public Decimal ventaMensual { get; set; }
    public Decimal porcentajeCumplimiento { get; set; }
    public Decimal valorComision { get; set; }
}

The error mention at the very beginning of the post is caused when trying to display the View CumplimientoOptometras.cshtml

Exactlty on this line

And here is the infamous RouteConfig

@Html.Action("consultaCumplimientoOptometras") 

public class RouteConfig
{
    public static void RegisterRoutes(RouteCollection routes)
    {
        routes.IgnoreRoute("{resource}.axd/{*pathInfo}");

        routes.MapRoute(
            name: "Default",
            url: "{controller}/{action}/{id}",
            defaults: new { controller = "Home", action = "Index", id = UrlParameter.Optional }
        );
    }
}

Answer 1

In the case the [HttpGet] was removed from the method and also removed the unused parameter (String x) and it now works

    //[HttpGet]
    public PartialViewResult consultaCumplimientoOptometras()
    {
        List<CumplimientoOptometraDTO> lstCumplimientosOpts;

        lstCumplimientosOpts = new List<CumplimientoOptometraDTO>();

        return PartialView("_consultaCumplimientoOptometras", lstCumplimientosOpts);
    }

I was replicating I pattern that I saw before were the same Controller method was also being called/reused from JQuery gith a GET request and that was the reason that [HttpGet] was initially added.

For this particular case since this code is currently not going to be called from JQuery I can safely remove the [HttpGet]. Still this feels more like a "solved with actually learning or finding root cause" and keep working scenario ;-)

If you reach this question looking for an answer and none of the ones here work for you feel free to comment on this answer with a link to your problem

While looking for an answer for this problem I found this very nice post about how to accept different HTTP VERBS on the same controller method

http://www.dotnetexpertguide.com/2012/11/aspnet-mvc-acceptverbs-action-filter.html

UPDATE if found the REAL REASON

This can also happen if you have many layers of calls that start with a POST (the main view CumplimientoOptometras.cshtml was resturn as a result of a POST action), then the call to @Html.Action or even RenderAction will still look for a POST method !! is this a limitation/bug or something that I am not understanding correctly)

So if you want to continue to accept the HTTP GET verb and fix the problem of cascading post request into a get request add this to your method

[AcceptVerbs(HttpVerbs.Get | HttpVerbs.Post)]

Keep in mind that [HttpGet] is the same as [AcceptVerbs(HttpVerbs.Get)]

Answer 2

This usually happens when you define your child action method inside one controller( Ex : HomeController) and try to call this method from a view belongs to another controller ( Ex : NovedadesCumplimientosController).

You can use another overload of Html.Action() method where you will specify the both the action name and controller name.

@Html.Action("consultaCumplimientoOptometras","Home") 

Assuming your consultaCumplimientoOptometras is defined inside HomeController