WebServices中使用Session

 /// <summary>
    /// Summary description for WebMethodSession
    /// </summary>
    [WebService(Namespace = "http://tempuri.org/")]
    [WebServiceBinding(ConformsTo = WsiProfiles.BasicProfile1_1)]
    [System.ComponentModel.ToolboxItem(false)]
    // To allow this Web Service to be called from script, using ASP.NET AJAX, uncomment the following line. 
    // [System.Web.Script.Services.ScriptService]
    public class WebMethodSession : System.Web.Services.WebService
    {

        [WebMethod(EnableSession = true)]
        public void SaveInSession(string msg)
        {
            Session["Msg"] = msg;
        }

        [WebMethod(EnableSession = false)]
        public string GetFromSession()
        {
            return Session["Msg"].ToString();
        }
    }