Check three condition on login

Question

hi, am new to mvc actually am trying to login with three condition 

 

 

 

problem (1) 

   if ( 1. login if email exist in emp table (or)2. login if email exist in user table )

   {

      

      return "succeslogin"; 

   }

   else if( 3. login if email exist in emp table for first time )

      { 

       

       return "succeslogin_first_time";

       } 

 }

else

{

 return "fails"; 

} 

 

 In my C#

 

public class All

{

public string EmailId { get; set; }

public string Password { get; set; }

}

 

public partial class tblEmployee

{

public int Id { get; set; }

public long Emp_Id { get; set; }

public string Emp_Email { get; set; }

public string Emp_Name { get; set; }

public string Emp_Dept { get; set; }

public Nullable<long> Emp_Mobile { get; set; }

public Nullable<long> Emp_Payroll { get; set; }

public string Emp_Password { get; set; }

public Nullable<bool> Emp_FirstLog { get; set; }

}

public partial class tblUser

{

public int Id { get; set; }

public string Email { get; set; }

public string Password { get; set; }

}

 

 

public string LoginAttempt(All user)

{

var loginEmp = db.tblEmployees.FirstOrDefault(e => e.Emp_Email == user.EmailId);

var loginUser = db.tblUsers.FirstOrDefault(u => u.Email == user.EmailId);

if (loginEmp != null || loginUser != null)

{

return "loginsuccess";

}

else if (loginEmp.Emp_FirstLog == "true") // 

{

return "error";

}

else{

return "error";

}

}

 

 

 Error 1 Inconsistent accessibility: parameter type 'ServerControl.Controllers.All' is less accessible than method 'ServerControl.Controllers.LoginAcuteController.LoginAttempt(ServerControl.Controllers.All)'

 Error 2 Operator '==' cannot be applied to operands of type 'bool?' and 'string'

 

  

 Problem(2)

 

1.How can i check if email login  for first time 

2.How can i define in email login for first time in database

 

 

 

please help me to solve this issue