asp.net mvc - How to input data to custom column in userprofile table when creating a new user -

i have added custom column user profile table called coid (int). when want create new user want send value 1 coid, experiencing trouble , cant work properly.

i using standard account tables mvc4.

here of code

accountmodel.cs

public class registermodel {     [required]     [display(name = "user name")]     public string username { get; set; }      [required]     [stringlength(100, errormessage = "the {0} must @ least {2} characters long.", minimumlength = 6)]     [datatype(datatype.password)]     [display(name = "password")]     public string password { get; set; }      [datatype(datatype.password)]     [display(name = "confirm password")]     [compare("password", errormessage = "the password , confirmation password not match.")]     public string confirmpassword { get; set; }      [datatype(datatype.custom)]     [display(name = "coid")]     [compare("coid", errormessage = "plese insert coid")]     public int coid { get; set; } }   [table("userprofile")] public class userprofile {     [key]     [databasegeneratedattribute(databasegeneratedoption.identity)]     public int userid { get; set; }     public string username { get; set; }     public int coid { get; set; } } 

accountcontroller.cs

    [httppost]     [allowanonymous]     [validateantiforgerytoken]     public actionresult register(registermodel model)     {         model.coid = 1;          if (modelstate.isvalid)         {             // attempt register user             try             {                 websecurity.createuserandaccount(model.username, model.password, model.coid);                 websecurity.login(model.username, model.password);                 return redirecttoaction("index", "home");             }             catch (membershipcreateuserexception e)             {                 modelstate.addmodelerror("", errorcodetostring(e.statuscode));             }         }          // if got far, failed, redisplay form         return view(model);     } 

when executing code getting error:

the custom data-type string cannot null or empty.

i think call websecurity.createuserandaccount might need looking at.

perhaps following might work better:

websecurity.createuserandaccount(model.username, model.password,      new { coid = model.coid }); 

as anonymous object can work out values you're trying assign field names. otherwise you're passing through value , doesn't know put it.