HttpContext.Session 属性

定义

命名空间:

System.Web

程序集:

System.Web.dll

为当前 HTTP 请求获取 HttpSessionState 对象。

public:
 property System::Web::SessionState::HttpSessionState ^ Session { System::Web::SessionState::HttpSessionState ^ get(); };

public System.Web.SessionState.HttpSessionState Session { get; }

member this.Session : System.Web.SessionState.HttpSessionState

Public ReadOnly Property Session As HttpSessionState

属性值

HttpSessionState

当前 HTTP 请求的 HttpSessionState 对象。

示例

以下示例演示如何在会话状态中保存值，以及如何从会话状态读取值。

这些示例需要：

• 启用了会话状态的 ASP.NET 应用程序。

• 有权访问 Page.Session 属性的Web Forms页类，或任何有权访问 属性的HttpContext.Current类。

string firstName = "Jeff";
string lastName = "Smith";
string city = "Seattle";

// Save to session state in a Web Forms page class.
Session["FirstName"] = firstName;
Session["LastName"] = lastName;
Session["City"] = city;

// Read from session state in a Web Forms page class.
firstName = (string)(Session["FirstName"]);
lastName = (string)(Session["LastName"]);
city = (string)(Session["City"]);

// Outside of Web Forms page class, use HttpContext.Current.
HttpContext context = HttpContext.Current;
context.Session["FirstName"] = firstName;
firstName = (string)(context.Session["FirstName"]);

Dim firstName As String = "Jeff"
Dim lastName As String = "Smith"
Dim city As String = "Seattle"

' Save to session state in a Web Forms page class.
Session("FirstName") = firstName
Session("LastName") = lastName
Session("City") = city

' Read from session state in a Web Forms page class.
firstName = DirectCast(Session("FirstName"), String)
lastName = DirectCast(Session("LastName"), String)
city = DirectCast(Session("City"), String)

' Outside of Web Forms page class, use HttpContext.Current.
Dim context As HttpContext = HttpContext.Current
context.Session("FirstName") = firstName
firstName = DirectCast(context.Session("FirstName"), String)

注解

属性 Session 提供对 类的属性和方法的 HttpSessionState 编程访问。

若要使用会话状态，必须启用它。 有关如何启用会话状态的信息，请参阅在 ASP.NET 会话状态概述中配置会话状态。

有关如何在会话状态中保存值的信息，请参阅 如何：在会话状态中保存值。 有关如何从会话状态读取值的信息，请参阅 如何：从会话状态读取值。