MVC:如何获取控制器以呈现从视图启动的部分视图 [英] MVC: How to get controller to render partial view initiated from the view

问题描述

在我的MVC5项目中，我想在局部视图中创建菜单.该菜单是动态的，因为它是根据数据库中的内容构建的.因此，我有一个控制器负责创建菜单并将菜单模型返回到我的局部视图:

In my MVC5 project I want to create a menu in a partial view. This menu is dynamic in the sense that it is built from content in my database. Thus I have a controller taking care of creating my menu and returning the menu model to my partial view:

public PartialViewResult GetMenu()
{
   MenuStructuredModel menuStructuredModel = menuBusiness.GetStructuredMenu();

   return PartialView("~/Views/Shared/MenuPartial", menuStructuredModel);
}

在名为 MenuPartial 的局部视图中，我想使用剃刀迭代菜单项，例如:

In my partial view called MenuPartial I want to use razor to iterate over my menu items, like:

@model MyApp.Models.Menu.MenuStructuredModel

<div class="list-group panel">
    @foreach (var category in Model.ViewTypes[0].Categories)
    {
        <a href="#" class="list-group-item lg-green" data-parent="#MainMenu">@category.ShownName</a>
    }
</div>

现在问题是在其中插入部分视图的视图.如果在视图中我只是这样做:

Now the problem is the view in which I insert the partial view. If in the view I simply do:

@Html.Partial("MenuPartial")

它不会调用控制器先用数据填充模型.我想要的是让控制器返回部分内容.但是我不知道该怎么做.在伪代码中，我想做类似的事情:

It won't call the controller to populate the model with data first. What I want is to let the controller return the partial. But I don't know how to do this from the view. In pseudo code I would like to do something like:

@Html.RenderPartialFromController("/MyController/GetMenu")

推荐答案

多亏了Stephen Muecke和Erick Cortorreal，我才开始工作.

Thanks to Stephen Muecke and Erick Cortorreal I got it to work.

这是控制器的外观:

[ChildActionOnly]
public PartialViewResult GetMenu()
{
   MenuStructuredModel menuStructuredModel = menuBusiness.GetStructuredMenu();

   return PartialView("~/Views/Shared/MenuPartial", menuStructuredModel);
}

它可能像这样:

@Html.Action("GetMenu", "Home")

(因此在我的示例中的HomeController中声明了GetMenu()).

(Hence GetMenu() is declared in the HomeController in my example).

现在在渲染局部视图之前调用控制器(并填充模型).

The controller is now called (and the model is populated) prior to the partial view is rendered.

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