是否可以在使用ASP.NET会话时强制请求并发？ [英] Is it possible to force request concurrency when using ASP.NET sessions?
问题描述
ASP.NET不允许同一会话的并发请求;
ASP.NET does not allow concurrent requests for the same session; meaning that a user can only make 1 request at a time.
例如，假设我们有 Test1.aspx ：
public partial class Test1 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Session["test"] = 1;
System.Threading.Thread.Sleep(int.Parse(Request.QueryString["timeout"]));
}
}
...和 Test2 .aspx ：
public partial class Test2 : System.Web.UI.Page
{
protected void Page_Load(object sender, EventArgs e)
{
Session["test"] = 1;
Label1.Text = DateTime.Now.ToString("dd/MM/yy HH:mm:ss");
}
}
< aspx？timeout = 10000 ，然后在访问 Page2.aspx 后立即，第二个请求将必须等待10秒，直到第一个请求完成。
When we visit Test1.aspx?timeout=10000, and then immediately after visit Page2.aspx, the 2nd request will have to wait for 10 seconds until the first request has finished.
我刚刚学习了这个，我已经使用ASP.NET 5年了！我真的不相信，直到我读它在MSDN页面的底部（ ASP.NET会话状态概述）。
I just learnt this today, and I've been using ASP.NET for 5 years! I didn't really believe it until I read it at the bottom of an MSDN page (ASP.NET Session State Overview).
那么，有没有办法强制并发？也就是说，除了使页面更快，或者将长时间运行的代码移动到后台线程。我知道你可以使会话只读，但我不完全确定这是一个实用的选择。
So, is there a way to force concurrency? That is, other than making pages faster, or moving long running code to a background thread. I'm aware that you can make the session read only, but I'm not entirely sure this is a practical option.
推荐答案
虽然我刚刚从这个问题学到这一点，我会确保检查实现会话状态存储提供程序，以获取有关其完成原因的更多信息。
Although I just learned this from the question, I'd make sure to check the Locking Session-Store Data section in Implementing a Session-State Store Provider, for more information on the why its done.
基于上述，似乎不是一个好主意，试图解决这个机制。
Based on the above, it really doesn't seem like a good idea to try to work around that mechanism.
像你提到的，保持请求短，将长时间运行的代码移出请求线程。此外：
Like you mentioned, keep the requests short and move long running code out of the request thread. Additionally:
- 如果您不需要，禁用会话。
- 避免不必要的会话使用。
所有这些都是你应该已经做的事情。
All of those are something you should already be doing anyway.
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