为导航创建 ViewModel

问题描述

我有一个带有多个视图的 MVC 4 应用程序.IE.产品、食谱、分销商和商店.

I have an MVC 4 application with several views. I.e. Products, Recipes, Distrubutors & Stores.

每个视图都基于一个模型.

Each view is based around a model.

让我们保持简单，说我所有的控制器都传递了一个类似的视图模型，看起来像我的 Product 操作:

Let's keep it simple and say that all my controllers pass a similar view-model that looks something like my Product action:

public ActionResult Index()
{
    return View(db.Ingredients.ToList());
}

好的，这很好，没有问题.但是现在我的所有页面都正常工作了，我想更改导航(每个视图都有下拉菜单)以加载该模型中的项目.

Ok so this is fine, no problems. But now that all of my pages work I want to change my navigation (which has dropdowns for each view) to load the items in that model.

所以我会有一个带有 4 个按钮(产品、食谱、分销商和商店)的导航.

So I would have a navigation with 4 Buttons (Products, Recipes, Distrubutors & Stores).

当您滚动每个按钮(假设我们滚动产品按钮)时，下拉菜单会列出产品.

When you roll over each button (let's say we roll over the products button) then a dropdown would have the Products listed.

为此，我需要创建某种类型的 ViewModel，将所有 4 个模型组合在一起.显然我不能只为每个导航元素剪下一个 PartialView 并使用

To do this I need to create some type of ViewModel that has all 4 of those models combined. Obviously I can't just cut out a PartialView for each navigation element and use

@model IEnumerable<GranSabanaUS.Models.Products>

然后重复该下拉菜单的产品，因为那样导航将只在产品视图中起作用，而在其他任何地方都不起作用.

And repeat out the Products for that dropdown, because then that navigation would only work in the Product View and nowhere else.

(解后)是的 ROWAN 您在我创建的导航类型中是正确的，请参见此处:

(After the solution)AND YES ROWAN You are correct in the type of nav I am creating, see here:

推荐答案

public class MenuContents
{
    public IEnumerable<Products> AllProducts { get; set; }
    public IEnumerable<Recepies> AllRecepies { get; set; }
    public IEnumerable<Distributors> AllDistributors { get; set; }
    public IEnumerable<Stores> AllStores { get; set; }

    private XXXDb db = new XXXUSDb();

    public void PopulateModel()
    {
        AllProducts = db.Products.ToList();
        AllRecepies = db.Recepies.ToList();
        AllDistributors = db.Distributors.ToList();
        AllStores = db.Stores.ToList();
    }
}

然后在你的控制器中

public ActionResult PartialWhatever()
{
    MenuContents model = new MenuContents();
    model.PopulateModel();

    return PartialView("PartialViewName", model);
}

然后在你的局部视图中

@Model MenuContents

... do whatever here

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