Using a created extension method

Here's the method I created:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using System.Web.Mvc.Html;
usin开发者_高级运维g MvcApplication1.Models;
using System.Text;

namespace MvcApplication1.HelperMethods
{
    public static class NavigationalMenu
    {
        public static string MyMenu(this HtmlHelper helper)
        {
            ProyectoFinalEntities x = new ProyectoFinalEntities();
            var categories = x.Categories;
            StringBuilder stringBuilder = new StringBuilder();
            foreach (Category c in categories)
            {
                stringBuilder.Append(helper.RouteLink(c.Name, "AuctionCategoryDetails", new { categoryName = c.Name }).ToString());
            }

            return stringBuilder.ToString();
        }
    }
}

I was told that I could then use this extension method in my Views (right now, I'm using _layout.cshtml) by using the @Html keyword, like so:

@Html.MyMenu //doesn't appears to be in the available method selection.

What's the reason why I can't call this method like that? Thanks for the help.

---

Update you web.config:

  <system.web>
    <pages>
      <namespaces>
        <add namespace="System.Web.Mvc" />
        <add namespace="System.Web.Mvc.Ajax" />
        <add namespace="System.Web.Mvc.Html" />
        <add namespace="System.Web.Routing" />
        <add namespace="System.Web.WebPages"/>
        <add namespace="System.Web.Helpers" />
        ...
        <add namespace="MvcApplication1.HelperMethods" /><!-- Add this line -->
      </namespaces>
    </pages>
  </system.web>

This way you won't need to use the using directive for MvcApplicatin1.HelperMethods in each View. And you can put multiple helper classes in that namespace.

---

Add a using clause for MvcApplication1.HelperMethods

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Wihtout seeing your view code it is hard to say exactly but you are probably missing a reference to MvcApplication1.HelperMethods in the view code.

---

You shouldn't need the @, Html should do just fine (though @Html should work as well). You'd need to actually invoke the method, though:

Html.MyMenu()

And if you haven't got a program like ReSharper that'll suggest this for you, you need to include a reference to that namespace

<%@ Import Namespace="MvcApplication1.HelperMethods" %>