#在布局视图中使用模型渲染局部模型 [英] #Render partial with a model in Layout View

问题描述

我有一个MVC项目，我想在其中使用Model渲染菜单.

I have a MVC project where I want to render my menu using Model.

我在Global.asax.cs的Session_Start事件中声明菜单内容，并使用断点知道该菜单正确填写了.

I declare the menu contents at the Session_Start event in Global.asax.cs and using break point i knew that it is filling out correctly.

我不能简单地在我的_Layout.cshtml

如果我执行@Html.Partial("_Menu", Model.Something)，我会得到

对象引用未设置为对象的实例

Object reference not set to an instance of an object

模型错误.

推荐答案

首先，我建议不要使用session对象，但是由于您正在使用它，因此请在从您那里继承的所有控制器将从会话中获取菜单数据，并将其推入视图包.然后，在_Layout中，您可以从视图包(

First off I would recommend against the session object, but since you're using it then in the Initialize method (override) of a common controller that ALL controllers inherit from you'll grab the menu data from the session, and push it into the viewbag. Then in the _Layout you can retrieve the object from the viewbag (

var navigationItems = ViewBag.NavigationItems as NavigationViewModel;

)作为字段，并将该对象或其属性传递到局部以进行渲染(

) as field and use that object anywhere by passing it or a property of it to a partial for rendering (

@Html.Partial("_Navigation", navigationItems) 

).

希望有帮助.

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