如何将HttpContext.Current传递给在.net中使用Parallel.Invoke()调用的方法 [英] How to pass HttpContext.Current to methods called using Parallel.Invoke() in .net

问题描述

我有两种使用HttpContext.Current来获取用户ID的方法.当我分别调用这些方法时，我获得了userID，但是当使用调用同一方法时 Parallel.Invoke()HttpContext.Current为null.

I have two methods which makes use of HttpContext.Current to get the userID. When I call these method individually, I get the userID but when the same method is called using Parallel.Invoke() HttpContext.Current is null.

我知道原因，我只是在寻找可以访问HttpContext.Current的方法.我知道这不是线程安全的，但我只想执行读取操作

public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {
            Display();
            Display2();
            Parallel.Invoke(Display, Display2);
        }

        public void Display()
        {
            if (HttpContext.Current != null)
            {
                Response.Write("Method 1" + HttpContext.Current.User.Identity.Name);
            }
            else
            {
                Response.Write("Method 1 Unknown" );
            }
        }

        public void Display2()
        {

            if (HttpContext.Current != null)
            {
                Response.Write("Method 2" + HttpContext.Current.User.Identity.Name);
            }
            else
            {
                Response.Write("Method 2 Unknown");
            }
        }
    }

谢谢

推荐答案

存储对上下文的引用，并将其作为参数传递给方法...

Store a reference to the context, and pass it to the methods as an argument...

赞:

    protected void Page_Load(object sender, EventArgs e)
    {
        var ctx = HttpContext.Current;
        System.Threading.Tasks.Parallel.Invoke(() => Display(ctx), () => Display2(ctx));
    }

    public void Display(HttpContext context)
    {
        if (context != null)
        {
            Response.Write("Method 1" + context.User.Identity.Name);
        }
        else
        {
            Response.Write("Method 1 Unknown");
        }
    }

    public void Display2(HttpContext context)
    {

        if (context != null)
        {
            Response.Write("Method 2" + context.User.Identity.Name);
        }
        else
        {
            Response.Write("Method 2 Unknown");
        }
    }

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