asp.net-mvc - 将模型传递到已编译的 Razor View 中时出现问题

Question

我有一个问题，我编译了 Razor View 并尝试在此处传递模型。所以，这是一个错误:

The model item passed into the dictionary is of type 'MvcApplication2.PluginHelloWorld.HelloWorldPluginViewModel', but this dictionary requires a model item of type 'MvcApplication2.PluginHelloWorld.HelloWorldPluginViewModel'

我有插件.cs文件( Controller 方法):

public class PluginHelloWorldController : PluginController
{
    public PluginHelloWorldController(string pluginDirectory) : base(pluginDirectory) { }

    [HttpGet]
    public ActionResult Index()
    {
        return RelativeView("index.cshtml", new HelloWorldPluginViewModel());
    }

    [HttpPost]
    public ActionResult Index(HelloWorldPluginViewModel model)
    {
        return RelativeView("index.cshtml", model);
    }
}

以及插件 Controller 方法:

public abstract class PluginController : Controller
{
    protected string PluginDirectory;

    // pluginDirectory will have a value like '~/extensions/plugins/rating/'
    public PluginController(string pluginDirectory)
    {
        if (pluginDirectory.EndsWith("/"))
        {
            PluginDirectory = pluginDirectory;
        }
        else
        {
            PluginDirectory = pluginDirectory + "/";
        }
    }
    public ViewResult RelativeView(string viewName, object model)
    {
        viewName = PluginDirectory + viewName;

        return base.View(viewName, model);
    }
}

所以，我这里有一个错误:

return base.View(viewName, model);

我想将模型传递到此方法中(我的 View 的.cs文件)

    public class _Page_index_cshtml : System.Web.Mvc.WebViewPage<MvcApplication2.PluginHelloWorld.HelloWorldPluginViewModel>
    {
#line hidden

        public _Page_index_cshtml()
        {
        }
        protected System.Web.HttpApplication ApplicationInstance
        {
            get
            {
                return ((System.Web.HttpApplication)(Context.ApplicationInstance));
            }
        }
        public override void Execute()
        {
            WriteLiteral("\r\n<h2>Hello!</h2>\r\n<p>");
            Write(Html.TextBox("hello", Model.foo));
            WriteLiteral("</p>");
        }
    }

<小时/>

正如我在这里看到的，它有效:http://www.java2s.com/Open-Source/ASP.NET/Forum/openforum/OpenForum/Core/Views/Forum/Index.cs.htm (将模型传递到已编译的 View 中，但我有这个奇怪的错误=)

我改变了这样的代码:

    public class _Page_index_cshtml : System.Web.Mvc.WebViewPage<dynamic>
    {
#line hidden

        public _Page_index_cshtml()
        {
        }
        protected System.Web.HttpApplication ApplicationInstance
        {
            get
            {
                return ((System.Web.HttpApplication)(Context.ApplicationInstance));
            }
        }
        public override void Execute()
        {

    var ViewModel = Model as MvcApplication2.PluginHelloWorld.HelloWorldPluginViewModel;    

WriteLiteral("\r\n<h2>Hello!</h2>\r\n<p>");
Write(ViewModel.foo);
//Write(Html.TextBox("hello", ViewModel.foo));
WriteLiteral("</p>");
        }
    }

现在出现错误:对象引用未设置到对象的实例。

<小时/>

所以，我尝试检查 ViewModel 和 ViewModel.foo 是否为 null，结果是正确的。看起来，传递 null 时出现问题，但为什么 =\

所以，这是错误之前的最后一点:

[HttpGet]
public ActionResult Index()
{
    return RelativeView("index.cshtml", new HelloWorldPluginViewModel());
} 

其他的话:

public ViewResult RelativeView(string viewName, object model)
    {
        viewName = PluginDirectory + viewName;

        return base.View(viewName, model);
    }

这里模型不为空。

但是当我在执行方法中检查它时:

public class _Page_index_cshtml : System.Web.Mvc.WebViewPage<MvcApplication2.PluginHelloWorld.HelloWorldPluginViewModel>
    {
#line hidden

        public _Page_index_cshtml()
        {
        }
        protected System.Web.HttpApplication ApplicationInstance
        {
            get
            {
                return ((System.Web.HttpApplication)(Context.ApplicationInstance));
            }
        }
        public override void Execute()
        {
            WriteLiteral("\r\n<h2>Hello!</h2>\r\n<p>");
            Write(Html.TextBox("hello", Model.foo));
            WriteLiteral("</p>");
        }
    }

模型为空...

Ofc，它可能适用于接口(interface)，我还没有尝试过，但是简单的对象传递有什么问题=\

还是不知道哪里出错了。Mb我必须在这里注册我的传递 View 模型:

protected void Application_Start()
{
    container = new WindsorContainer();
    // register 'normal' controllers
    container.Register(AllTypes.FromThisAssembly().BasedOn<IController>().If(t => t.Name.EndsWith("Controller")).Configure((ConfigureDelegate)(c => c.LifeStyle.Transient)));

    // string is the route path
    // type is the plugin controller type
    // it maps routes like '/admin/plugins/rating/{action}' to Crash.PageRating.PageRatingController
    Dictionary<string, Type> pluginTypes = new Dictionary<string, Type>();

    // location of the plugins
    var allPluginsDir = new DirectoryInfo(Server.MapPath("~/extensions/plugins/"));
    foreach(var dir in allPluginsDir.GetDirectories())
    {
        string pluginDir = string.Format("~/extensions/plugins/{0}/", dir.Name);

        // loop through all dll files, though only one should exist per directory
        foreach(var dll in dir.GetFiles("*.dll"))
        {
            var assembly = Assembly.LoadFrom(dll.FullName);
            // register compiled razor views
            // e.g. 'settings.cshtml' is registered as '~/extensions/plugins/rating/settings.cshtml'
            BoC.Web.Mvc.PrecompiledViews.ApplicationPartRegistry.Register(assembly, pluginDir);

            // only one controller per plugin in this case
            var controllerType = assembly.GetTypes().Where(t => typeof(PluginController).IsAssignableFrom(t)).FirstOrDefault();
            if(controllerType != null)
            {
                // register controller
                // pass pluginDir to the constructor
                container.Register(Component.For(controllerType).DependsOn(new { pluginDirectory = pluginDir }).LifeStyle.Transient);
                // admin route url
                var pluginUrl = string.Format("plugins/{0}/{{action}}", dir.Name);
                // map admin route to controller
                pluginTypes.Add(pluginUrl, controllerType);
                RouteTable.Routes.MapRoute("plugin_" + dir.Name, pluginUrl, new {controller=controllerType.Name.Replace("Controller",""),action="Index" },new[]{controllerType.Namespace});

            }
        }
    }

    AreaRegistration.RegisterAllAreas();
    // Controller factory
    var controllerFactory = new CrashControllerFactory(container.Kernel,pluginTypes);
    ControllerBuilder.Current.SetControllerFactory(controllerFactory);

    RegisterRoutes(RouteTable.Routes);            
}

看起来我必须这样做，但不知道如何=\

任何人都可以帮助将模型传递到编译的 Razor View 中吗？

Answer 1

您可以使用@viewbag.xxxx

您想要传递给“ View ”的任何内容，只需输入 viewbag.xxx然后在 View 中，您可以使用@viewbag.xxx。

它会显示出来，无论是 View 数据还是数据库数据。