Problem with HtmlHelper and MVC not seeing my new method

I tried to create this HtmlHelper method:

namespace Power.WebUx.Helpers
{
    public static class HtmlHe开发者_JS百科lperExtensions
    {

public static MvcHtmlString SelectedIfMatch(this HtmlHelper helper, string actual, string expected)
        {
            if (expected == actual)
            {
                return new MvcHtmlString("<option selected=\"selected\" value=\"" + actual + "\"" + actual + "</option>");
            }
            else
            {
                return new MvcHtmlString("<option value=\"" + actual + "\"" + actual + "</option>");
            }
        }

I added the Power.WebUx.Helpers line to my web.config:

<pages>
  <namespaces>
    <add namespace="System.Web.Helpers" />
    <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="Power.WebUx.Helpers" />
  </namespaces>
</pages>

However when I try to use the extension I get an error message saying that System.Web.Mvc.HtmlHelper does not contain a definition for SelectedIfMatch

Does the code I am trying to run look right or am I missing something?

Hope someone can see something obvious.

thanks

Jon Wylie

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Import the namespace into your view to use any extension methods in that namespace

<%@ Import Namespace = "Power.WebUx.Helpers" %>

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Make sure you're modifying the top level web.config file(instead of the one in the views folder), then close and open the files where you're trying to use the helper