asp.net-mvc – 从基本控制器继承LINQ-to-SQL数据上下文

我的基本控制器类BaseController由面向公众的控制器继承,以访问具有LINQ-to-SQL的请求之间的共享数据上下文.

>我是否以高效安全的方式访问我的数据上下文,将其存储在每个http请求的httpContext.Current.Items中？

DataContextHelper类

internal static class DataContextHelper
{
    public static MyDataContext CurrentContext
    {
        get
        {
            if (httpContext.Current.Items["MyDataContext"] == null)
            {
                MyDataContext context = new MyDataContext();
                httpContext.Current.Items["MyDataContext"] = context;
            }
            return (MyDataContext)httpContext.Current.Items["MyDataContext"];
        }
    }
}

BaseController类：

public class BaseController : Controller
{
    protected MyDataContext db
    {
        get {
            return DataContextHelper.CurrentContext;
        }
    }
}

HomeController类：

[HandleError]
public class HomeController : BaseController // inherits db member
{
    public ActionResult SomeAction(String id)
    {
        User user = db.Users.First(u => u.UserId == id);
        // ... do stuff
        db.SubmitChanges();
    }
}

protected override void OnActionExecuted(ActionExecutedContext filterContext)
    {
        if (httpContext.Current.Items["MyDataContext"] == null)
            return;

        var context = (MyDataContext)httpContext.Current.Items["MyDataContext"];

        context.Dispose();
    }