首先这是我的错误：找不到类型或名称空间名称“ Web”（您是否缺少using指令或程序集引用？）
public class _Page_Plugins_Views_Web_Plugins_Controls_Controls_Menu_cshtml : System.Web.Mvc.WebViewPage<Web.Plugins.Controls.Models.MenuModel> {
我正在使用MEF和强类型视图构建可插入的MVC 3.0 Razor网站。在让我建立菜单之前，我让插件正常工作。菜单是其自身的插件。我用过http://www.thegecko.org/index.php/2010/06/pluggable-mvc-2-0-using-mef-and-strongly-typed-views/comment-page-1/#comment-7130。到目前为止，一切都和我提到的一样好，但是当我在布局中渲染菜单时，它会弹出一个错误（请参见上文）。
下面是实现此目的的代码。为什么要尝试渲染视图，而不仅仅是局部视图？
我的控制器：
[HandleError]
[ControllerMetaData("Controls")]
[Export(typeof(IController)), PartCreationPolicy(CreationPolicy.NonShared)]
public class ControlsController : MefController
{
public virtual ActionResult Menu()
{
var builder = new MenuModelBuilder(Context.MenuContainer);
ViewData.Model = builder.BuildModel();
return PartialView();
}
}
我的_Layout.cshtml
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>@ViewBag.Title</title>
<link href="@Url.Content("~/Content/Web.Plugins.Presentation/Site.css")" rel="stylesheet" type="text/css" />
<script src="@Url.Content("~/Scripts/Web.Plugins.Presentation/jquery-1.5.1.min.js")" type="text/javascript"></script>
<script src="@Url.Content("~/Scripts/Web.Plugins.Presentation/modernizr-1.7.min.js")" type="text/javascript"></script>
</head>
<body>
<div class="page">
<header>
<div id="title">
<h1>My MVC Application</h1>
</div>
<div id="logindisplay">
@Html.Partial("_LogOnPartial")
</div>
<nav>
<ul id="menu">
@*<li>@Html.ActionLink("Home", "Index", "Home")</li>
<li>@Html.ActionLink("About", "About", "Home")</li>*@
@{
Html.Action("Menu", "Controls");
}
</ul>
</nav>
</header>
<section id="main">
@RenderBody()
</section>
<footer>
</footer>
</div>
我的MefViewEngine.cs
public class MefViewEngine : RazorViewEngine
{
private readonly string _defaultMaster;
public MefViewEngine(string pluginPath, IEnumerable<IPluginRegistration> plugins, string defaultMaster)
{
_defaultMaster = defaultMaster;
CreateViewLocations(pluginPath, plugins);
}
public override ViewEngineResult FindView(ControllerContext controllerContext, string viewName, string masterName, bool useCache)
{
// Set default master page
if (string.IsNullOrWhiteSpace(masterName) && !controllerContext.IsChildAction)
{
masterName = _defaultMaster;
}
// Ensure name is correct
if (masterName.ToLowerInvariant().EndsWith(".cshtml"))
{
masterName = masterName.ToLowerInvariant().Replace(".cshtml", string.Empty);
}
if (string.IsNullOrWhiteSpace(masterName))
{
return base.FindPartialView(controllerContext, viewName, useCache);
//masterName = _defaultMaster;
}
return base.FindView(controllerContext, viewName, masterName, useCache);
}
protected override IView CreateView(ControllerContext controllerContext, string viewPath, string masterPath)
{
// If view isn't .aspx, remove master page
if (!viewPath.ToLowerInvariant().EndsWith(".cshtml"))
{
masterPath = string.Empty;
}
var nameSpace = controllerContext.Controller.GetType().Namespace;
//return base.CreateView(controllerContext, viewPath.Replace("%1", nameSpace), masterPath.Replace("%1", nameSpace));
return base.CreateView(controllerContext, viewPath, masterPath);
}
#region Helper Methods
private void CreateViewLocations(string pluginPath, IEnumerable<IPluginRegistration> plugins)
{
IList<string> viewLocations = new List<string>();
IList<string> masterLocations = new List<string>();
string pluginLocation;
foreach (IPluginRegistration plugin in plugins)
{
pluginLocation = string.Format("~/{0}/Views/{1}/", pluginPath, plugin.AssemblyName);
AddViewLocation(viewLocations, pluginLocation);
AddMasterLocation(masterLocations, pluginLocation);
}
pluginLocation = "~/Views/";
AddViewLocation(viewLocations, pluginLocation);
ViewLocationFormats = viewLocations.ToArray();
PartialViewLocationFormats = viewLocations.ToArray();
MasterLocationFormats = masterLocations.ToArray();
AreaViewLocationFormats = new[] {
"~/" + pluginPath + "/Views/{2}/{1}/{0}.cshtml",
"~/" + pluginPath + "/Views/{2}/{1}/{0}.cshtml",
"~/" + pluginPath + "/Views/{2}/Shared/{0}.cshtml",
"~/" + pluginPath + "/Views/{2}/Shared/{0}.cshtml",
};
AreaPartialViewLocationFormats = AreaViewLocationFormats;
AreaMasterLocationFormats = new[] {
"~/" + pluginPath + "/Views/{2}/{1}/{0}.cshtml",
"~/" + pluginPath + "/Views/{2}/Shared/{0}.cshtml",
};
}
private static void AddViewLocation(IList<string> viewLocations, string pluginLocation)
{
viewLocations.Add(pluginLocation + "{1}/{0}.cshtml");
viewLocations.Add(pluginLocation + "{1}/{0}.cshtml");
viewLocations.Add(pluginLocation + "Shared/{0}.cshtml");
viewLocations.Add(pluginLocation + "Controls/{0}.cshtml");
viewLocations.Add(pluginLocation + "Shared/{0}.cshtml");
}
private static void AddMasterLocation(IList<string> viewLocations, string pluginLocation)
{
viewLocations.Add(pluginLocation + "{0}.cshtml");
viewLocations.Add(pluginLocation + "{1}/{0}.cshtml");
viewLocations.Add(pluginLocation + "Shared/{0}.cshtml");
}
#endregion
}
我不了解MEF，但是从我对MVC的了解中，您不应该返回PartialViewResult而不是Action结果吗？
public virtual PartialViewResult Menu()
{
var builder = new MenuModelBuilder(Context.MenuContainer);
ViewData.Model = builder.BuildModel();
return PartialView();
}
您是否已将所有名称空间添加到Views文件夹中的web.config？您还应该在“区域”中为web.config文件添加相同的引用。
您在Razor视图中创建和引用的任何名称空间都必须添加到元素中包含的名称空间集合中。