模式的共同传递数据MVC4.5到_layout.cshtml [英] Pattern for passing common data to _layout.cshtml in MVC4.5

问题描述

我想拿出最好的方式将数据传递到我的_layout.cshtml页面。

我与创建一个共同的基类，所有查看具体型号衍生玩弄。这个基类会被我的_layout.cshtml识别并用于填充关于用户详细信息并在标题等。例如加载正确的图像，这里是它的一个片段。

 公共抽象类ViewModelBase
{
    公共字符串用户名{获得;组; }
    公共字符串版本{搞定;组; }
}
 

在我_layout.cshtml顶部我有...

  @model MyProject.Web.Controllers.ViewModelBase
 

我需要一个公共区域来滋润模型所需的信息，我打算使用下面的模式...

1. 每个操作方法创建和水合物来源于一个模型
   ViewModelBase。


2. 的动作完成。


3. 我创建了一个ActionFilterAttribute和覆盖OnActionExecuted铸就
   目前的结果为ViewModelBase。


4. 如果转换成功，那么我填充ViewModelBase细节与相关数据。

下面是我的问题...

1. 是使用ActionFilterAttribute（OnActionExecuted）的良好格局为我所试图做的？


2. 我不能看到如何让从HttpActionExecutedContext动作产生的结果。如何做到这一点？

解决方案

我按照同样的方法，并使用一个基视图模型类，我的所有其他的ViewModels继承。

然后，我有一个基本的控制器，所有的控制器继承。在那里，我有一个方法，它初始化视图模型的护理：

 保护牛逼CreateViewModel＆LT; T＆GT;（）其中T：ViewModel.BaseViewModel，新的（）
{
    VAR viewModelT =新款T {
                        HeaderTitle =欢迎来到我的域名，
                        VisitorUsername = this.VisitorUsername，
                        IsCurrentVisitorAuthenticated = this.IsCurrentVisitorAuthenticated，                        // ...
                    };    返回viewModelT;
}
 

然后每个控制器上，当我想创建视图模型，我只是调用基控制器的方法：

  VAR VM = base.CreateViewModel＆LT; MyPageCustomViewModel＆GT;（）;
 

I am trying to come up with the best pattern for passing data to my _layout.cshtml page.

I am toying with creating a common base class from which all view specific models derive. This base class would be recognized by my _layout.cshtml and used to fill in details about the user and load proper images in the header, etc. For example, here is a snippet of it.

public abstract class ViewModelBase
{
    public string Username { get; set; }
    public string Version { get; set; }
}

At the top of my _layout.cshtml I have...

@model MyProject.Web.Controllers.ViewModelBase

I need a common area to hydrate the information required by the model, and am planning to use the following pattern...

1. Each action method creates and hydrates a model derived from ViewModelBase.
2. The action completes.
3. I create a ActionFilterAttribute and override OnActionExecuted to cast the current Result to ViewModelBase.
4. If the conversion is successful, then I populate the ViewModelBase details with the relevant data.

Here are my questions...

1. Is the use of a ActionFilterAttribute (OnActionExecuted) a good pattern for what I am trying to do?
2. I am not able to see how to get the Result created in the action from the HttpActionExecutedContext. How is this done?

解决方案

I follow the same approach and use a base ViewModel class which all my other viewModels inherit from.

Then, I have a base controller that all controller inherit from. In there, I have one method that takes care of initializing the view model:

protected T CreateViewModel<T>() where T : ViewModel.BaseViewModel, new()
{
    var viewModelT = new T {
                        HeaderTitle = "Welcome to my domain",
                        VisitorUsername = this.VisitorUsername,
                        IsCurrentVisitorAuthenticated = this.IsCurrentVisitorAuthenticated,

                        //...
                    };

    return viewModelT;
}

Then on each controller, when I want to create the view model, I simply call the base controller's method:

var vm = base.CreateViewModel<MyPageCustomViewModel>();

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