C# HttpContext.Current.Session 在 Ashx 文件中为 null
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HttpContext.Current.Session is null in Ashx file
提问by Mosh Feu
I saw some questions (Hereand Here) but they do not answer my question. I am trying to call Ajax using "ajax.ashx" file, and in function to access Session. For some reason, the value of the Session object itself is null.
我看到了一些问题（这里和这里），但他们没有回答我的问题。我正在尝试使用“ajax.ashx”文件调用 Ajax，并在函数中访问会话。出于某种原因，Session 对象本身的值是 null。
Use example:
使用示例：
Session = HttpContext.Current.Session // This is null
Or:
或者：
public virtual void ProcessRequest(HttpContext context)
{
System.Web.SessionState.HttpSessionState Session = context.Session;
// This is null
}
In the Web.config:
在 Web.config 中：
<sessionState timeout="1800"></sessionState>
采纳答案by Aristos
You must add on your handler the IRequiresSessionStateon the declaration of it as:
您必须在您的处理程序IRequiresSessionState上添加它的声明为：
public class YourHandleName : IHttpHandler, IRequiresSessionState
{
...
by default the handlers are not connected with the session to keep them minimum, by adding the IRequiresSessionStateyou attach them with the session.
默认情况下，处理程序不与会话连接以保持它们最小，通过添加IRequiresSessionState您将它们附加到会话中。
