ASP.NET MVC Beta 1 - where is Html.RenderPartial?

问题

I'm just in the process of upgrading my Preview 5 application to Beta 1, and I'm nearly there save for this one error when trying to render a control:

'System.Web.Mvc.HtmlHelper' does not contain a definition for 'RenderPartial' and no extension method 'RenderPartial' accepting a first argument of type 'System.Web.Mvc.HtmlHelper' could be found (are you missing a using directive or an assembly reference?)

My markup (in the .aspx View Content Page) is:

<% Html.RenderPartial("Controls/UserForm", ViewData); %>

I've tried using Microsoft.Web.Mvc but to no avail. Does anyone know where Html.RenderPartial has gone, or what alternative I could use?

回答1:

And also don't forget to add namespaces like below to the web config, I think preview 5 default web.config does not have System.Web.Mvc.Html in it:

<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.Linq"/>
 <add namespace="System.Collections.Generic"/>
</namespaces>

回答2:

Now fixed - the conflict was a difference in Web.config requirements between Preview 5 and Beta 1. The following needs to be added into the system.web compilation assemblies node:

<add assembly="System.Web.Mvc, Version=1.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35"/>

After this change, all of my old HtmlHelper methods magically came back!

回答3:

In addition to adding the assembly reference I also had to add the line

 <add namespace="System.Web.Mvc.Html"/>"  

to the pages/namespaces section in web.config file.

来源：https://stackoverflow.com/questions/211493/asp-net-mvc-beta-1-where-is-html-renderpartial