如何在ASP.Net MVC中访问会话变量 [英] how to access session variable in ASP.Net MVC

问题描述

我有一个ASP.Net MVC 5 Web应用程序，我想在会话中设置一个变量，以便以后可以访问它.由于我是初学者，所以我不知道该如何实现.下面是我尝试过的

I have a ASP.Net MVC 5 web application and I want to set a variable in the session so that I can access it later. As I am a beginner I don't know how to achieve it. Below is what I have tried

clsUser user = mdlUser.GetUserForSession();
System.Web.HttpContext.Current.Session["MyValue"] = user.SessionID; // user.SessionID is an integer
int x =  System.Web.HttpContext.Current.Session["MyValue"] as int; // Access

但是我收到错误作为错误，

But I get error as Error as

as运算符必须与引用类型或可为null的类型("int"为不可为null的值类型)一起使用

The as operator must be used with a reference type or nullable type ('int' is a non-nullable value type)

SO LINK REFERRED

推荐答案

来自文档(我的重点):

您可以使用as运算符在兼容的引用类型或可为空的类型之间进行某些类型的转换

You can use the as operator to perform certain types of conversions between compatible reference types or nullable types

int是值类型，而不是引用类型，因此不能使用as运算符，因此您需要使用经典"方法来转换值.

int is a value type, not a reference type, therefore the as operator cannot be used, so you need the 'classic' method for casting the value.

int x = (int)System.Web.HttpContext.Current.Session["MyValue"];

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