c# - How do I add the user ID To authenticate a cookie in mvc4 -

how add user id ti authenticated cookie

using system; using system.collections.generic; using system.linq; using system.web; using system.web.mvc; using system.web.security; using system.security.cryptography; using system.text;  namespace project.controllers {     public class logincontroller : controller     {         // get: /login/         private datacontext db = new datacontext();          public actionresult index()         {             return view();         }          [httppost]         public actionresult index(loginmodel model)         {             if (modelstate.isvalid)             {                 string username = model.username;                 user login = db.users.where(m => m.name == username).first();                 string pass = convert.tobase64string(new md5cryptoserviceprovider().computehash(new utf8encoding().getbytes(model.password)));                  if (login != null && pass == login.password)                 {                     formsauthentication.setauthcookie(model.username, false);                     return redirecttoaction("index", "project");                 }                  modelstate.addmodelerror("", "invalid username or password");             }             return view();         }                 } } 

this code project article explains in pretty detail different ways accomplish trying do. http://www.codeproject.com/articles/36836/forms-authentication-and-role-based-authorization

if (!formsauthentication.cookiessupported) {     //if authentication ticket specified not use cookie, set in uri     formsauthentication.setauthcookie(encrypetedticket, createpersistentcookie); } else {     //if authentication ticket specified use cookie, wrap within cookie.     //the default cookie name .aspxauth if not specified      //in <forms> element in web.config     httpcookie authcookie = new httpcookie(formsauthentication.formscookiename, encrypetedticket);      //set cookie's expiration time tickets expiration time     if(ticket.ispersistent)         authcookie.expires =ticket.expiration ;      ////set cookie in response     httpcontext.current.response.cookies.add(authcookie); }