ASP.NET MVC - 填充常用Dropdownlists [英] ASP.NET MVC - Populate Commonly Used Dropdownlists

问题描述

我在想，最好的做法是什么ASP.NET MVC填充常用dropdownlists时。举例来说，我有一个用于经常在我的应用程序一个国家和状态来选择。这似乎脏从我的控制器填充视图模型并绑定到视图模型，因为我想包含这样一个DropDownList每一个单一视图。

I was wondering what the best practice is when populating commonly used dropdownlists in ASP.NET MVC. For instance, I have a Country and State select which is used often in my application. It seems dirty to populate viewmodel and bind to that viewmodel from my controller for every single view I want to contain such a dropdownlist.

人们如何填充其dropdownlists在这种情况下？ - 与此自定义基类中出炉？辅助类等？

How do people populate their dropdownlists in such cases? - custom baseclass with this baked in? Helper classes, etc?

由于提前，

JP

推荐答案

您可以有一个 RequiresStateList 属性注入到需要它的行动的常见功能。

You can have a RequiresStateList attribute to inject that common functionality to the actions that need it.

public class RequiresStateList : ActionFilterAttribute {
    public override void OnResultExecuting(ResultExecutingContext filterContext) 
    {
        filterContext.Controller.ViewData["StateList"] = GetStates();
    }
}

和你的行动

[RequiresStateList]
public ActionResult Index() {
    return View();
}

现在你可以在你的视图从ViewData的该列表中。

Now you can get that list from the ViewData in your view.

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