how to exchange session or cookie variables between two webmethods in asp.net webservices

I have two webmethod i have used session variable to exchange the username variable between two webmethods but its displaying null in second webmethod ,can we use cookie as alte开发者_如何学编程rnate to session to store and retrieve username

[WebMethod(EnableSession = true)]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    public bool SubmitList1(string username )
    {
       Session["User_Name"] = username;
      .........
        .......

     }
[WebMethod(EnableSession = true)]
    [ScriptMethod(ResponseFormat = ResponseFormat.Json)]
    public bool addresslisting( string keyword)
    {

       string username = Context.Session["User_Name"].ToString();
        ........
          .........
    }

Disclaimer: I think that a web service that relies on Session state is just plain WRONG since a web service should be stateless. However:

At http://msdn.microsoft.com/en-us/library/aa480509.aspx you can read about how to use ASP.NET Session in a web service:

1. Make sure that /configuration/system.web/sessionState in web.config is configured properly to enable session state
2. Make sure that uses the web service has a cookie container where the ASP.NET session cookie can be stored. If the client is from a web browser (e.g. ajax call) this usually works out of the box, but if you are building a standalone client, you have to do some more work, see the link above.

All in all: a bad design decision gives you more work than necessary (sorry for rubbing it in).

I think you should redesign you web service so that you either always send username and password in all methods or add a login method that gives the client a token that is sent with each web service request.