剃刀MVC，在那里把全局变量是整个母版页，partiview和视图访问？ [英] Razor MVC, where to put global variables that's accessible across master page, partiview and view?
问题描述
您好剃刀MVC大师：
新手问题。
背景。我有一个在一个HttpModule之前它获取控制器和功放设置自定义的IIdentity;意见。要使用它，我必须做的。
Background. I have a custom IIdentity that is set in an HttpModule before it gets to controller & views. To use it, i have to do
MyIdentity myIdentity = (MyIdentity)((GenericPrincipal)context.User).Identity;
MyComplexUser user = myIdentity.User;
//user.name //user.location //user.username //etc
问题是，我用在不同的地方的对象，例如
The problem is, I use the object in different places such as
- 总体布局
- 某些子级嵌套布局
- 某些partialviews
- 的几点看法
这真的要看是什么性质的MyComplexUser反对的意见，需要。
It really depends on what properties of "MyComplexUser" object the views need.
目前，在视图中，我不得不这样做非常复杂的铸造，获得一个属性。举例来说，如果我想在用户的名，我需要做的。
Currently, in the views, I have to do this really complicated casting to get to a property. For instance, if I want the "Name" of the user, I need to do
@（（（MyComplexUser）（（（MyIdentity）（（的GenericPrincipal）context.User）.Identity）。用户））。名称）
@(((MyComplexUser)(((MyIdentity)((GenericPrincipal)context.User).Identity).User)).Name)
我想我可以把它的控制器，然后填充ViewBag用ViewBag.MyUser属性，但是这样
I suppose I could put it in the controllers and then populate the ViewBag with a ViewBag.MyUser property, but then
- 我不喜欢用ViewBag。我preFER强类型对象
- 如果我用一个强类型的对象（MYUSER）的意见，那我也风靡了MYUSER属性的车型。感觉有点脏？正如我喜欢让我的模型清洁，具体到他们参与的意见。此外，它会是不必要的重复。
- 在像master_layout.cshtml或partialviews，地方你怎么进入MYUSER如果我把它们放在一个控制器？
- 使用和的RenderAction建立每个用户属性partialviews是矫枉过正？
感谢。同样，我在MVC 4的新手，任何建议是极大的AP preciate它。
Thanks. Again, I'm a newbie at MVC 4, any suggestion is greatly appreciate it.
推荐答案
我会解释，工程pretty很适合我类似的解决方案。有了小的变化，我的认为的，它会为你工作（和其他人，希望）为好。
I'll explain a similar solution that works pretty well for me. With small changes, I believe that it will work for you (and others, hopefully) as well.
基本上，我们将使用继承
让我们创建一个自定义的基本控制，如
Let's create a custom base controller, such as
public class BaseController : Controller
让我们改变我们的控制器来继承它，因为
and let's change our controllers to inherit from it, as
public class HomeController : BaseController
模型（的ViewModels，我说的）
您可能会有很多类的模型文件夹内，对不对？他们作为从控制器到DTO的意见，right²？
如果你的回答的是的两个，那么请继续阅读。
Models (ViewModels, I say)
You probably have lots of classes inside your Models folder, right? They act as DTOs from the controller to the views, right²? If you answered yes for both, then keep reading.
让我们创建一个基础模型类，如公共类BaseVM ，让我们改变我们的模型来继承它，就像公共类HomeIndex： BaseVM
Let's create a base model class, such as public class BaseVM, and let's change our models to inherit from it, like public class HomeIndex : BaseVM
重要：您的布局文件（ _layout 或任何）必须强类型为 BaseVM 或它的孩子。
Important: your layout file (_Layout or whatsoever) must be strongly typed to BaseVM or a child of it.
现在，一切的漂亮类型，让我们使用对我们有利的请求管道。
在 BaseController ，您会添加类似如下的方法：
Now that everything's beautifuly typed, let's use the request pipeline in our favor.
At BaseController, you'll add a method that looks like this:
protected override void OnActionExecuted(ActionExecutedContext filterContext)
{
if (filterContext.Result is ViewResultBase)//Gets ViewResult and PartialViewResult
{
object viewModel = ((ViewResultBase)filterContext.Result).Model;
if (viewModel != null && viewModel is BaseVM)
{
BaseVM baseVM = viewModel as BaseVM;
baseVM.MyIdentity = (MyIdentity)((GenericPrincipal)context.User).Identity;
//and so on...
}
}
base.OnActionExecuted(filterContext);//this is important!
}
OnActionExecuted 被称为在执行的动作，但之前视图渲染。这正是我们想要的。
OnActionExecuted is called after the execution of the action but before the view rendering. That's exactly what we want.
我希望你得到它了。 =）
I hope you got it already. =)
这篇关于剃刀MVC，在那里把全局变量是整个母版页，partiview和视图访问？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
