// Method that delete Employee from database
public void DeleteEmployee(int employeeID)
{
try
{
using (EmployeeDBEntities context = new EmployeeDBEntities())
{
//creating a list of employees for which employee with forwarded id is the manager
var employeeOfThisManager = context.tblEmployees.Where(x => x.Manager == employeeID).ToList();
//if the list is not empty, setting manager id to null for every employee in that list
if (employeeOfThisManager.Count() > 0)
{
foreach (var employee in employeeOfThisManager)
{
employee.Manager = null;
LogAction("Employee with ID " + employee.EmployeeID + " updated so he has no manager.");
}
}
//finding employee with forwarded id
tblEmployee employeeToDelete = context.tblEmployees.Where(x => x.EmployeeID == employeeID).FirstOrDefault();
//if that employee was the only in the sector, deleting sector
var peopleInSector = context.tblEmployees.Where(x => x.Sector == employeeToDelete.Sector).ToList();
if (peopleInSector.Count() == 1)
{
var sector = context.tblSectors.Where(x => x.SectorID == employeeToDelete.Sector).FirstOrDefault();
context.tblSectors.Remove(sector);
context.SaveChanges();
LogAction("Sector " + sector.SectorName + " with ID: " + sector.SectorID + " deleted.");
}
//removing employee from DbSet and saving changes to database
context.tblEmployees.Remove(employeeToDelete);
context.SaveChanges();
LogAction("Employee with ID " + employeeToDelete.EmployeeID + " deleted.");
}
}
catch (Exception ex)
{
Debug.WriteLine("Exception" + ex.Message.ToString());
}
}
// This method checks if sector already exists in database
public bool IsSectorExists(string sectorName)
{
try
{
using (EmployeeDBEntities context = new EmployeeDBEntities())
{
tblSector sector = context.tblSectors.Where(x => x.SectorName == sectorName).FirstOrDefault();
if (sector != null)
{
return(true);
}
else
{
return(false);
}
}
}
catch (Exception ex)
{
Debug.WriteLine("Exception" + ex.Message.ToString());
return(false);
}
}
