copy data from one list to another

Question

i have two lists srsEmps and destEmps from classes

List<srsEmployee> srsEmps = db.srsEmployees.ToList();
List<destEmployee> destEmps = db2.destEmployees.ToList();

public class srsEmployee
  {
    public int Id { get; set; }
    public string Name { get; set; }
    public string EmpCode { get; set; }
    public Nullable<decimal> Salary { get; set; }
    public Nullable<system.datetime> StartDate { get; set; }
    public Nullable<system.datetime> BOD { get; set; }
    public int DepartmentId { get; set; }
    public bool Active { get; set; }
    public virtual srsDepartment srsDepartment { get; set; }
}

public class destEmployee
{
    public int Id { get; set; }
    public string Name { get; set; }
    public string EmpCode { get; set; }
    public Nullable<decimal> Salary { get; set; }
    public Nullable<system.datetime> StartDate { get; set; }
    public Nullable<system.datetime> BOD { get; set; }
    public int DepartmentId { get; set; }
    public bool Active { get; set; }
    public virtual destDepartment destDepartment { get; set; }
 }

And this is my action and i want change .First method because .First is used to find equivalent element (based on Id) in the orher list and i want to copy all data

       public ActionResult Deploy()
    {
        List<srsEmployee> srsEmps = db.srsEmployees.ToList();
        List<destEmployee> destEmps = db2.destEmployees.ToList();
        db2.Database.ExecuteSqlCommand("TRUNCATE TABLE [destEmployees]");
        foreach (var element in destEmps)
        {
            var oldValue = srsEmps.First(t => t.Id == element.Id);
            element.Name = oldValue.Name;
            element.EmpCode = oldValue.EmpCode;
            element.Salary = oldValue.Salary;
            element.StartDate = oldValue.StartDate;
            element.BOD = oldValue.BOD;
            element.DepartmentId = oldValue.DepartmentId;
            element.Active = oldValue.Active;
        }
        foreach (var item in destEmps)
        {
            db2.destEmployees.Add(item);
        }
        db2.SaveChanges();

        return View();
    }

i want to copy data from srsEmps to destEmps using linq so if i have in srsEmps = {emp1,emp2,emp3} i want to copy all those objects to destEmps

Answer 1

You can convert a class to another when your properties' names are same, just like your classes.

1) Download the nuget package "Automapper".

2) Create a your converter AutoMapperProfile class by using Profile class of Automapper package.

public class AutoMapperProfile : Profile
    {
        public AutoMapperProfile()
        {
            CreateMap<srsEmployee, destEmployee>();
        }
    }

3) Define the dependency in Application_Start in Global.asax.

Mapper.Initialize(x =>
{
    x.AddProfile<AutoMapperProfile>();
});

4) Finally, you can convert list to another list.

List<srsEmployee> srsEmps = db.srsEmployees.ToList();

destEmps  = srsEmps.Select(x => Mapper.Map<destEmployee>(x))
                   .ToList();