MVC3 - 从[无为]控制器事件重定向 [英] MVC3 - Redirect from a [NonAction] Controller event

问题描述

比方说，我是一个[无为]控制器事件中，想出来重定向到首页？什么是这样做的最简单的方法是什么？

Let's say I'm inside a [NonAction] controller event and would like to redirect out to the Home Page? What's the easiest way to do so?

[NonAction]
private ShoppingCartModel PrepareShoppingCartModel(ShoppingCartModel model, 
    IList<ShoppingCartItem> cart)
{
    if (cart == null)
        throw new ArgumentNullException("cart");

    if (model == null)
        throw new ArgumentNullException("model");

    if (cart.Count == 0)
        return model;

    ...bla bla bla (lots of code)     
 }

现在3号线，如果Cart.Count如果= 0，而不是返回一个空的模式，即得到视图显示空的，我宁愿重定向到首页。

Now on the 3rd line, if the Cart.Count if = 0, instead of returning a empty model, that gets the View Display empty, I would rather redirect to the Home Page.

我不能使用return RedirectToAction（）使编译器给了我以下错误：

I cannot use return RedirectToAction() cause the compiler gives me the following error:

无法隐式转换类型'System.Web.Mvc.RedirectToRouteResult
  以Web.Models.ShoppingCart.ShoppingCartModel

Cannot implicitly convert type 'System.Web.Mvc.RedirectToRouteResult' to 'Web.Models.ShoppingCart.ShoppingCartModel'

问：结果
那么什么是退出[无为]控制器程序的正确方法？

QUESTION:
So what's the right way to exit a [NonAction] Controller procedure?

推荐答案

返回类型应该是的ActionResult 和您应该返回，而不是唯一模式视图（模型）。您code应该像下面。

Return type should be ActionResult and you should return View(model) instead of only model. Your code should be like below.

[NonAction]
private ActionResult PrepareShoppingCartModel(ShoppingCartModel model, 
    IList<ShoppingCartItem> cart)
{
    if (cart == null)
        throw new ArgumentNullException("cart");

    if (model == null)
        throw new ArgumentNullException("model");

    if (cart.Count == 0)
        return View(model);

    ...bla bla bla (lots of code)     
 }

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