asp.net mvc 4 - I need to update the model view and reflect those changes in database -

here,i have typed view in i'm showing registered user his/her data in form allow updating edited data , make changes reflected database.

i have written code action methods in both , post method accordingly can't figure out what's causing issue.the issue changes made on view page binded model class not reflected database table though have written method db.submit changes().

below code: , post action methods detailsupdate view page:

    [httppost]          [validateantiforgerytoken]          public actionresult patientdetailspage2(patients p)          {              if (modelstate.isvalid)              {                  tblpatient updatedpatientdetail = new tblpatient()                  {                      patientname = p.patientname,                      patientage = (short) p.age,                      patientmail = p.patientemail,                      patientmobileno = p.patientmobileno,                      patientpassword = p.patientpassword                  };                  db.submitchanges();                  return view();              }              else              {                  viewbag.errormessage = "please ensure fields filled correctly";              }              return view();            }          public actionresult patientdetailspage2()          {              if(tempdata["doc"] != null)              {                  var data = (patients)tempdata["doc"];                  return view(data);              }              return view();          }

also mention when place debug , scan updated values shows updated value @ point model's object assigned table parameters submit changes line code scanned shows old value password field(the field value want updated here).please me programmers!

    [httppost]     [validateantiforgerytoken]     public actionresult patientdetailspage2(patients p)     {         if (modelstate.isvalid)         {             tblpatient updatedpatientdetail = new tblpatient()             {                 patientname = p.patientname,                 patientage = (short) p.age,                 patientmail = p.patientemail,                 patientmobileno = p.patientmobileno,                 patientpassword = p.patientpassword             };             db.patients.add(updatedpatientdetail);             db.submitchanges();             return view();         }         else         {             viewbag.errormessage = "please ensure fields filled correctly";         }         return view();      } 

you must add model object db model before save.