A brief introduction to using session in general handlers in ASP.NET

<%@ WebHandler Language="C#" Class="ChangePwd" %> 

using System; 
using System.Web; 
using System.Web.SessionState; 
public class ChangePwd : IHttpHandler, IReadOnlySessionState 
{ 

    public void ProcessRequest (HttpContext context) 

   { 
        context.Response.ContentType = "text/plain"; 
        OperUser ou = new OperUser(); 
        if (ou.ChangeWsPassword(context.Session["ws_user"].ToString(),context.Request.QueryString["pwd"].ToString())) 
        { 
            context.Response.Write("true"); 
        } 
        else
        { 
            context.Response.Write("flase"); 
        } 

    } 

    public bool IsReusable { 
        get { 
            return false; 
        } 
    } 

}

Plus using System.Web.SessionState; and IReadOnlySessionState

If your handler will access session state values, it must implement the IRequiresSessionState interface (a tagged interface that does not contain any methods).


Import using System.Web.SessionState;
Sure enough, just add an IRequiresSessionState mark interface to the custom class, and there is no need to implement any methods.
At the same time, there is another interface: the IReadOnlySessionState interface, which is used to instruct the Http handler to have read-only permissions on the Session. It is also an empty interface and does not need to implement any methods.

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