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POUsing MVC HtmlHelper extensions from Razor declarative views
 

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    <p>I was trying to create a Razor declarative helper in my App_Code folder for an MVC 3 RTM project.</p> <p>The problem I ran into was that the MVC HtmlHelper extensions, like ActionLink, aren't available. This is because the compiled helpers derive from <code>System.Web.WebPages.HelperPage</code>, and though it exposes an <code>Html</code> property, its of type <code>System.Web.WebPages.HtmlHelper</code> rather than <code>System.Web.Mvc.HtmlHelper</code>.</p> <p>An example of the kind of error I was getting is:</p> <blockquote> <p>'System.Web.Mvc.HtmlHelper' does not contain a definition for 'ActionLink' and no extension method 'ActionLink' accepting a first argument of type 'System.Web.Mvc.HtmlHelper' could be found (are you missing a using directive or an assembly reference?)</p> </blockquote> <p>My only solution has been to create my own HelperPage and override the Html property:</p> <pre><code>using System.Web.WebPages; public class HelperPage : System.Web.WebPages.HelperPage { // Workaround - exposes the MVC HtmlHelper instead of the normal helper public static new HtmlHelper Html { get { return ((System.Web.Mvc.WebViewPage) WebPageContext.Current.Page).Html; } } } </code></pre> <p>I then have to write the following at the top of every helper:</p> <pre><code>@inherits FunnelWeb.Web.App_Code.HelperPage @using System.Web.Mvc @using System.Web.Mvc.Html @helper DoSomething() { @Html.ActionLink("Index", "Home") } </code></pre> <p>Is it meant to be this hard in MVC 3, or am I doing something wrong?</p>
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    1. USPaul Stovell
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      1. USDrew Noakes
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    1. COIf you need also the Url helper you culd add this line of code to HelperPage: public static UrlHelper Url { get { return new UrlHelper(Html.ViewContext.RequestContext); } }
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      1. USMarco Staffoli
 

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