getting error of "NullReferenceException was unhandled by user code" while i try to display first name after successful login in ASP.NET MVC -

i getting error of "nullreferenceexception unhandled user code" while try display first name after successful login in asp.net mvc.

model:

 using system;  using system.collections.generic;  using system.componentmodel.dataannotations;  using system.data;  using system.data.sqlclient;  using system.linq;  using system.web;  using system.data.linq.mapping;  namespace club.models { public class user {     int j;   public string type1  { get; set; }     [required]     [display(name = "user name")]     public string username { get; set; }      [required]     [datatype(datatype.password)]     [display(name = "password")]     public string password { get; set; }      [display(name = "remember on computer")]     public bool rememberme { get; set; }      /// <summary>     /// checks if user given password exists in database     /// </summary>     /// <param name="_username">user name</param>     /// <param name="_password">user password</param>     /// <returns>true if user exist , password correct</returns>     ///        public bool isvalid(string _username, string _password)     {         using (var cn = new sqlconnection(@"data source=.\sqlexpress;attachdbfilename=e:\softwares\asp.net\club_hardik\club\app_data\club.mdf;integrated security=true;user instance=true"))         {             string _sql = @"select [contactno],[type] tbllogin " +                    @"where [contactno] = @u , [password] = @p";             var cmd = new sqlcommand(_sql, cn);             console.writeline(cmd);             cmd.parameters                 .add(new sqlparameter("@u", sqldbtype.nvarchar))                 .value = _username;             cmd.parameters                 .add(new sqlparameter("@p", sqldbtype.nvarchar))                 .value = models.sha1.encode(_password);              cn.open();              sqldatareader reader = cmd.executereader();              if (reader.hasrows)             {                 reader.read();                 type1 = reader.getstring(1);                 reader.dispose();                 cmd.dispose();                 return true;             }             else             {                 reader.dispose();                 cmd.dispose();                 return false;             }         }     } } 

}

controller:

using system; using system.collections.generic; using system.linq; using system.web; using system.web.mvc; using system.web.security; using club.models; using system.text.regularexpressions; namespace club.controllers { public class usercontroller : controller {     //     // get: /user/      public actionresult index()     {         return view();     }     [httpget]     public actionresult member(user model)     {          var model1 = new m_reg();         using (var db = new clubdatacontext())         {             var content = p in db.m_registarions                           p.m_contactno == model.username                           select p;             foreach (m_registarion p in content)             {                 model1.fname = p.m_fname;              }         }         return view();     }     [httpget]     public actionresult memberdisplay(user u)     {          return view();     }     [httpget]     public actionresult login()     {         return view();     }      [httppost]     public actionresult login(models.user user)     {         if (modelstate.isvalid)         {             if (user.isvalid(user.username, user.password))             {                  formsauthentication.setauthcookie(user.username, user.rememberme);                 string = (user.type1).tostring();                 string fixedstringone = regex.replace(a, @"\s+", string.empty);                  if (string.equals(fixedstringone, "member"))                 {                     return redirecttoaction("member",user);                 }                 else if (fixedstringone.equals("admin"))                 {                     return redirecttoaction("admin", "admin");                 }                 else                 { }             }             else             {                 modelstate.addmodelerror("", "login data incorrect!");             }         }         return view(user);     }     public actionresult logout()     {         formsauthentication.signout();         return redirecttoaction("index", "home");     }  } 

} view:

@model club.models.m_reg    @{     viewbag.title = "member";     }   <h2>member</h2>    @using (html.beginform( ))     {      <div>     <fieldset>          <div class="editor-label">            <span>welcome   @model.fname </span> 

here getting error of** null reference unhandled usercode

        </div>         </fieldset>         </div> 

}

when debug line line 'firstname' database not display in view , getting error of "nullreference exception". don't know meaning of error. me solve error.

the model property in view null. should pass model created in member action view:

[httpget] public actionresult member(user model) {     var model1 = new m_reg();     // ...     return view(model1); } 

looking @ code, have same potential errors in memberdisplay , login actions.