如何在静态方法中获取会话变量的值?

I am using ASP.NET page methods with jQuery.... How do I get the value of a session variable inside a static method in C#?

我用ASP。与jQuery ....网络页面的方法如何在c#中的静态方法中获取会话变量的值?

protected void Page_Load(object sender, EventArgs e)
{
    Session["UserName"] = "Pandiya";
}

[WebMethod]
public static string GetName()
{
    string s = Session["UserName"].ToString();
    return s;
}

When I compile this I get the error:

当我编译这个时，我得到了错误:

An object reference is required for the non-static field, method, or property 'System.Web.UI.Page.Session.get'`

非静态字段、方法或属性'System.Web.UI.Page.Session.get'需要对象引用。

4 个解决方案

#1

HttpContext.Current.Session["..."]

HttpContext.Current.Session(“…”)

HttpContext.Current gets you the current ... well, Http Context; from which you can access: Session, Request, Response etc

HttpContext。电流使你得到电流…Http上下文;您可以从其中访问:会话、请求、响应等

#2

If you haven't changed thread, you can use HttpContext.Current.Session, as indicated by jwwishart.

如果没有改变线程，可以使用HttpContext.Current。会话，如jwwishart所示。

HttpContext.Current returns the context associated with the thread. Obviously this means you can't use it if you've started a new thread, for example. You may also need to consider thread agility - ASP.NET requests don't always execute on the same thread for the whole of the request. I believe that the context is propagated appropriately, but it's something to bear in mind.

HttpContext。当前返回与线程关联的上下文。显然，这意味着如果启动了一个新线程，就不能使用它。您可能还需要考虑线程敏捷性- ASP。NET请求并不总是在同一线程上执行整个请求。我相信上下文是适当传播的，但这是需要记住的。

#3

Try this:

试试这个:

HttpContext.Current.Session["UserName"].ToString();

#4

You can access the current Session via HttpContext.Current - a static property through which you can retrieve the HttpContext instance that applies to the current web request. This is a common pattern in static App Code and static page methods.

您可以通过HttpContext访问当前会话。Current—一个静态属性，您可以通过它检索适用于当前web请求的HttpContext实例。这是静态应用程序代码和静态页面方法中的常见模式。

string s = (string)HttpContext.Current.Session["UserName"];

The same technique is used to access the Session from within ASMX web methods decorated with [WebMethod(EnableSession = true)] because whilst such methods are not static they do not inherit from Page and thus do not have direct access to a Session property.

同样的技术用于从装饰有[WebMethod(EnableSession = true)]的ASMX web方法中访问会话，因为这些方法不是静态的，它们不是从页面继承的，因此不能直接访问会话属性。

Static code can access the Application Cache in the same way:

静态代码可以以相同的方式访问应用程序缓存:

string var1 = (string)HttpContext.Current.Cache["Var1"];

If the static code is inside another project we need to reference System.Web.dll. However, in this case it is generally best to avoid such a dependency because if the code is called from outside of an ASP.NET context HttpContext.Current will be null, for obvious reasons. Instead, we can require a HttpSessionState as an argument (we'll still need the reference to System.Web of course):

如果静态代码在另一个项目中，我们需要引用System.Web.dll。但是，在这种情况下，最好避免这种依赖关系，因为如果代码是从ASP外部调用的。HttpContext净上下文。当前将是空的，原因很明显。相反，我们可以要求HttpSessionState作为参数(我们仍然需要对系统的引用)。当然网络):

public static class SomeLibraryClass
{
    public static string SomeLibraryFunction(HttpSessionState session)
    {
       ...
    }
}

Call:

电话:

[WebMethod]
public static string GetName()
{
    return SomeLibraryClass.SomeLibraryFunction(HttpContext.Current.Session);
}

#1