/// <summary>
/// Optional: This method uses the stored procedure to retrieve a single employee from the database
/// </summary>
/// <param name="id">Integer value ID of the employee</param>
/// <param name="useStoredProcedure">true = Yes</param>
/// <returns>Employee</returns>
public Employee GetEmployee(long id, bool useStoredProcedure)
{
try
{
using (var entity = new EmployeesEntities())
{
if (useStoredProcedure)
{
var current = entity.GetEmployee(id).First();
return(new Employee
{
Active = current.Active,
Department = current.Department,
DOB = current.DOB,
Firstname = current.Firstname,
Gender = current.Gender,
Id = current.Id,
Lastname = current.Lastname
});
}
else
{
return(GetEmployee(id));
}
}
}
catch { return(null); }
}
/// <summary>
/// This method retrieves a collection of employees from the database
/// </summary>
/// <returns>Employee Collection</returns>
public List <Employee> GetEmployees()
{
try
{
using (var entity = new EmployeesEntities())
{
var query = from item in entity.Employees
select item;
return(query.ToList());
}
}
catch { return(null); }
}
/// <summary>
/// This method retrievs a single employee entity from the database
/// </summary>
/// <param name="id">Integer value ID of the employee</param>
/// <returns>Employee</returns>
public Employee GetEmployee(long id)
{
try
{
using (var entity = new EmployeesEntities())
{
var query = from item in entity.Employees
where (item.Id.Equals(id))
select item;
return(query.First());
}
}
catch { return(null); }
}
/// <summary>
/// This method removes a single employee from the database
/// </summary>
/// <param name="id">Integer value ID of the employee</param>
/// <returns>0 = Failed</returns>
public long Delete(long id)
{
try
{
using (var entity = new EmployeesEntities())
{
var query = from item in entity.Employees
where (item.Id.Equals(id))
select item;
var employee = query.First();
entity.Employees.Remove(employee);
id = entity.SaveChanges();
return(id);
}
}
catch { return(0); }
}
/// <summary>
/// Save employee object to the database using EF
/// </summary>
/// <param name="employee">Employee</param>
/// <returns>0 = Failed</returns>
public long Save(Employee employee)
{
try
{
var res = Exist(employee.Id);
using (var entity = new EmployeesEntities())
{
if (!res)
{
var id = entity.CreateEmployee(DateTime.Now, employee.Firstname, employee.Lastname, employee.DOB, employee.Gender, employee.Department, employee.Active).First().Value;
return(id);
}
else
{
var query = from item in entity.Employees
where (item.Id.Equals(employee.Id))
select item;
var current = query.FirstOrDefault <Employee>();
if (current != null)
{
current.Active = employee.Active;
current.Department = employee.Department;
current.DOB = employee.DOB;
current.Firstname = employee.Firstname;
current.Gender = employee.Gender;
current.Lastname = employee.Lastname;
var id = entity.SaveChanges();
return(id);
}
return(0);
}
}
}
catch { return(0); }
}
