如何从会话中检索通用列表? [英] How to retrieve a generic list from session?

问题描述

我有一个会话列表:

Session.Add("SessionList", mylist);

如何从会话中找回它?

推荐答案

var list = Session["SessionList"] as List<whatevertypeYouUsed>;

if (list != null){
   // blah...
}

我更喜欢使用 as 关键字，因为不能100％保证Session将包含该列表(由于应用程序池刷新，网站正在重启等).为您提供额外的防御，以避免 NullReferenceException .

I prefer to use the as keyword since there is no 100% guarantee that the Session will contain the list (due to application pool refresh, website being restarted, etc). Gives you that extra bit of defence to avoid a NullReferenceException.

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