这样做的强类型ASP.NET MVC的会话更好的办法 [英] Better way of doing strongly-typed ASP.NET MVC sessions

问题描述

我开发一个ASP.NET MVC项目，并希望使用强类型会话对象。我已实现了以下控制器的派生类揭露这个对象：

I am developing an ASP.NET MVC project and want to use strongly-typed session objects. I have implemented the following Controller-derived class to expose this object:

public class StrongController<_T> : Controller
    where _T : new()
{
    public _T SessionObject
    {
        get
        {
            if (Session[typeof(_T).FullName] == null)
            {
                _T newsession = new _T();
                Session[typeof(_T).FullName] = newsession;
                return newsession;
            }
            else
                return (_T)Session[typeof(_T).FullName];
        }
    }

}

这使我来定义会话对象的每个控制器，它是在与控制器隔离的概念线。有没有更好/更正确的方式，或许是目前正式支持通过Microsoft？

This allows me to define a session object for each controller, which is in line with the concept of controller isolation. Is there a better/more "correct" way, perhaps something that is officially supported by Microsoft?

推荐答案

此方式与其它对象将不能访问这个对象（例如ActionFilter）。我这样做，是这样的：

This way other objects won't have access to this object (e.g. ActionFilter). I do it like this:

public interface IUserDataStorage<T>
{
   T Access { get; set; }
}

public class HttpUserDataStorage<T>: IUserDataStorage<T>
  where T : class
{
  public T Access
  {
     get { return HttpContext.Current.Session[typeof(T).FullName] as T; }
     set { HttpContext.Current.Session[typeof(T).FullName] = value; }
  }
}

然后，我可以注入到IUserDataStorage控制器的构造函数，或使用ServiceLocator.Current.GetInstance（typeof运算（IUserDataStorage＆LT; T＆GT;））。里面ActionFilter

Then, I can either inject IUserDataStorage into controller's constructor, or use ServiceLocator.Current.GetInstance(typeof(IUserDataStorage<T>)) inside ActionFilter.

public class MyController: Controller
{
   // automatically passed by IoC container
   public MyController(IUserDataStorage<MyObject> objectData)
   {
   }
}

课程的情况下，当全部控制器需要这个（例如ICurrentUser），你可能需要使用注射财产代替。

Of course for cases when all controllers need this (e.g. ICurrentUser) you may want to use property injection instead.

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