asp.net mvc 3 - Save a value to Database - MVC -

i trying save value in "usercontroller" cannot seem tog et save database.

i can database value stored in usercontroller change when value submitted , view refreshed looks though stored. (ie. changing test tested) however, refresh page again returns previous value , database shows no change throughout this.

usercontroller:

var g = httppost.vanityurl;  db.ppuser_edituser(g); 

ppuser_edituser in ppuser:

public ppuser ppuser_edituser(string personvanity)     {         ppuser user = sessionuser.loggedinuser.person;         user.vanityurl = personvanity;         basedb.submitchanges();         return user;     } 

editprofile view:

<div>     @html.labelfor(m => m.vanityurl, "edit custom url:")     @html.textboxfor(m => m.vanityurl, new { maxlength = 15 }) </div>     

basedb:

public partial class studiokit_mvc3repository : idisposable {     private studiokit_mvc3modelsdatacontext _basedb;     public studiokit_mvc3modelsdatacontext basedb     {                 {             if (_basedb == null)             {                 if (studiokit_mvc3config.environmentdetail.name == "production")                 {                     _basedb = new studiokit_mvc3modelsdatacontext(studiokit_mvc3config.environmentdetail.connectionstring);                 }                 else                 {                     var sqlconnection = new sqlconnection(studiokit_mvc3config.environmentdetail.connectionstring);                     var conn = new profileddbconnection(sqlconnection, miniprofiler.current);                     _basedb = new studiokit_mvc3modelsdatacontext(conn);                 }             }              return _basedb;         }     } } 

edit: figured out problem. saving value session user instance , not actual database. got rid of method , in controller put:

ppuser check = db.ppuser_getuserbypersonid(model.cskpersonid); check.vanityurl = httppost.vanityurl; db.save();