Web service session problem

[nastoski]

Dear all,
I’m trying to figure out how session variables work in web services, but obviously I found myself in trouble. I would appreciate your help.

I create a web service with following Global.asax and Service.asmx files

//Global.asax
…
protected void Session_Start(Object sender, EventArgs e)
{
Session[“TID”] = 1;
}

//Service.asmx
…
[WebMethod(EnableSession=true)]
public int CalculateSession()
{
Session[“TID”] = ((int)Session[“TID”]) + 1;
return (int) Session[“TID”];
}
…


Problem starts when I call a web service from Console Application (previously I add web service in a project via Add Web references)

namespace Client
{
/// <summary>
/// Summary description for Class1.
/// </summary>
class Class1
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main(string[] args)
{
localhost.WebService ws = new localhost.WebService()
for (int i=0; i<10;i++)
{
Console.WriteLine (“session {0}”,ws.CalculateSession);
}
}
}
}

When running client program I always get one same response
session 2
session 2
session 2
session 2
session 2
…

This is kind of strange to me, because I expected that with localhost.WebService ws = new localhost.WebService() I would open a session and Session[“TID”] that I would get will be incremented by 1, but obviously I’m wrong. Can someone explain what am I doing wrong.It seems that every time i call a method from webservice new session is opened and the new instance of class is created.

Thanks in advance,

Regards,

Igor Nastoski

 

[nastoski]

i found some solution which didn't work for me

namespace Client
{
/// <summary>
/// Summary description for Class1.
/// </summary>
class Class1
{
/// <summary>
/// The main entry point for the application.
/// </summary>
[STAThread]
static void Main(string[] args)
{
localhost.WebService ws = new localhost.WebService()

CookieContainer ck = new System.Net.CookieContainer();

ws.CookieContainer = ck;
for (int i=0; i<10;i++)
{
Console.WriteLine (“session {0}”,ws.CalculateSession);
}
}
}
}

Regards,
Igor

 

[jmeckley]

I believe this is always returning the same result because the session is specific to the request. each request creates a new session. instead you may want to try using Application or Cache variables instead of Session. These are accessible across all requests.

instead of calling Session["TID"] call Application["TID"] or Cache["TID"].

remember that webservices, just like web forms, are stateless. By design they shouldn't remember what just happened, only what's happening right now.

Jason Meckley
Programmer
Specialty Bakers, Inc.