asp.net 子应用程序/虚拟目录 session共享

 /// <summary>
    /// 这个模块需要放到整个管道的前端
    /// </summary>
    public class SessionShareModule : IHttpModule
    {

        void IHttpModule.Init(HttpApplication context)
        {
            Type storeProvider = typeof(HttpSessionState).Assembly.GetType("System.Web.SessionState.OutOfProcSessionStateStore");

            FieldInfo uriField = storeProvider.GetField("s_uribase", BindingFlags.Static | BindingFlags.NonPublic);

            if (uriField == null)
            {
                throw new ArgumentException("UriField was not found");
            }

            uriField.SetValue(null, "xxx.cn");

            context.EndRequest += new EventHandler(this.EndRequest);
        }



        /// <summary>
        /// 在请求结束之后，将所有的cookie的域都改写为 xxx.cn
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="args"></param>
        void EndRequest(object sender, EventArgs args)
        {
            HttpApplication application = sender as HttpApplication;

            for (int i = 0; i < application.Response.Cookies.Count; i++)
            {
                application.Response.Cookies[i].Domain = "xxx.cn";
            }
        }



        void IHttpModule.Dispose()
        {

        }
    }