session存储

session存储

添加接口： IRequestSessionState

添加引用：System.Web.SessionState

---------------------------------------------------------------------------------------------

缓存再次相同数据不能写入问题：

                context.Session["userId"] = userId;

                context.Session.Remove("userId");
                context.Session["userId"] = null;

                context.Response.Buffer = true;
                context.Response.ExpiresAbsolute = System.DateTime.Now.AddDays(-1);
                context.Response.Expires = 0;
                context.Response.CacheControl = "no-cache";
                context.Response.AddHeader("pragma", "no=cache");