MVC business layer

public void Save(EmployeeViewModel employeeViewModel)
{
    var employee = (from emp in dataContext.Employees
                   where emp.EmployeeID == employeeViewModel.EmployeeID
                   select emp).SingleOrDefault();

 
    if (employee != null)
    {

        employee.Address = employeeViewModel.Address;
        employee.Salary = employeeViewModel.Salary;
        employee.Title = employeeViewModel.Title;
    }
    dataContext.SubmitChanges();
}

public void Save(EmployeeViewModel employeeViewModel)
{

    var employee = (from emp in dataContext.Employees
                    where emp.EmployeeID == employeeViewModel.EmployeeID
                    select emp).SingleOrDefault();

     if (employee != null)
    {
        ModelCopier.CopyModel(employeeViewModel, employee);
    }
    dataContext.SubmitChanges();

}

 

refer :http://weblogs.asp.net/rajbk/archive/2010/03/31/easy-way-to-update-models-in-your-asp-net-mvc-business-layer.aspx