asp.net mvc - Preventing OnActionExecuting and filtering -

i have filter class.

 public class sessional : actionfilterattribute     {             public override void onactionexecuting(actionexecutingcontext filtercontext)         {             httpsessionstatebase session = filtercontext.httpcontext.session;             loggeduserinfo user = (loggeduserinfo)session["user"];              if ((user == null && !session.isnewsession) || (session.isnewsession))             {                 urlhelper urlhelper = new urlhelper(filtercontext.requestcontext);                 string loginurl = urlhelper.content("~/account/logout");                 fauth.abandonsession();                 formsauthentication.signout();                 filtercontext.httpcontext.response.redirect(loginurl, true);             }         }     } 

when apply on controller, action logout user if session unavailable. want write attribute allow action work without loggin out, example unsessional.

 [authorize]      [sessional]     public class reportcontroller : controller     {         [httpget]          [unsessional]         public actionresult getreport() //unsessional action         {             return view();         }          [httppost]         public actionresult getreport(getreportmodel model) //sessional action         {             if (!modelstate.isvalid)             {                 return view();             }             return view();         }     } 

you can check "unsessionattribute" existance current action, here sample code:

 public override void onactionexecuting(actionexecutingcontext filtercontext)         {              if(filtercontext.actiondescriptor.getcustomattributes(typeof(unsessionattribute), true).length > 0)             {                   return;             }              httpsessionstatebase session = filtercontext.httpcontext.session;             loggeduserinfo user = (loggeduserinfo)session["user"];              if ((user == null && !session.isnewsession) || (session.isnewsession))             {                 urlhelper urlhelper = new urlhelper(filtercontext.requestcontext);                 string loginurl = urlhelper.content("~/account/logout");                 fauth.abandonsession();                 formsauthentication.signout();                 filtercontext.httpcontext.response.redirect(loginurl, true);             }         }