// Example
public List <Auto> GetAllAutos()
{
using (KundenReservationContext dbContext = new KundenReservationContext())
{
return(dbContext.Autos.ToList());
}
}
public List <Kunde> GetAllKunde()
{
using (KundenReservationContext dbContext = new KundenReservationContext())
{
return(dbContext.Kunden.ToList());
}
}
public List <Reservation> GetAllReservation()
{
using (KundenReservationContext dbContext = new KundenReservationContext())
{
return(dbContext.Reservationen.ToList());
}
}
public Reservation FindReservationByNr(int searchId)
{
using (KundenReservationContext dbContext = new KundenReservationContext())
{
return(dbContext.Reservationen
.SingleOrDefault(r => r.ReservationsNr == searchId));
}
}
public Kunde FindKundeById(int id)
{
using (KundenReservationContext dbContext = new KundenReservationContext())
{
return(dbContext.Kunden
.Where(k => k.Id == id)
.FirstOrDefault());
}
}
public Auto Delete(Auto auto)
{
using (KundenReservationContext dbContext = new KundenReservationContext())
{
dbContext.Entry(auto).State = EntityState.Deleted;
dbContext.SaveChanges();
return(auto);
}
}
public Kunde Delete(Kunde kunde)
{
using (KundenReservationContext dbContext = new KundenReservationContext())
{
dbContext.Entry(kunde).State = EntityState.Deleted;
dbContext.SaveChanges();
return(kunde);
}
}
public Reservation Delete(Reservation res)
{
using (KundenReservationContext dbContext = new KundenReservationContext())
{
dbContext.Entry(res).State = EntityState.Deleted;
dbContext.SaveChanges();
return(res);
}
}
public Auto FindAutoById(int id)
{
using (KundenReservationContext dbContext = new KundenReservationContext())
{
return(dbContext.Autos
.Where(a => a.Id == id)
.FirstOrDefault());
}
}
public Auto Insert(Auto auto)
{
using (KundenReservationContext dbContext = new KundenReservationContext())
{
Auto insertedAuto = dbContext.Autos.Add(auto);
dbContext.Entry(insertedAuto).State = EntityState.Added;
dbContext.SaveChanges();
return(insertedAuto);
}
}
public Reservation Insert(Reservation res)
{
using (KundenReservationContext dbContext = new KundenReservationContext())
{
Reservation insertedReservation = dbContext.Reservationen.Add(res);
dbContext.Entry(insertedReservation).State = EntityState.Added;
dbContext.SaveChanges();
return(insertedReservation);
}
}
public Kunde Insert(Kunde kunde)
{
using (KundenReservationContext dbContext = new KundenReservationContext())
{
Kunde insertedKunde = dbContext.Kunden.Add(kunde);
dbContext.Entry(insertedKunde).State = EntityState.Added;
dbContext.SaveChanges();
return(insertedKunde);
}
}
public Auto Update(Auto auto)
{
using (KundenReservationContext dbContext = new KundenReservationContext())
{
try
{
dbContext.Entry(auto).State = EntityState.Modified;
dbContext.SaveChanges();
return(auto);
}
catch (DbUpdateConcurrencyException ex)
{
throw CreateOptimisticConcurrencyException <Auto>(dbContext, auto);
}
}
}
public Reservation Update(Reservation res)
{
using (KundenReservationContext dbContext = new KundenReservationContext())
{
try
{
dbContext.Entry(res).State = EntityState.Modified;
dbContext.SaveChanges();
return(res);
}
catch (DbUpdateConcurrencyException)
{
throw CreateOptimisticConcurrencyException <Reservation>(dbContext, res);
}
}
}
public Kunde Update(Kunde kunde)
{
using (KundenReservationContext dbContext = new KundenReservationContext())
{
try
{
dbContext.Entry(kunde).State = EntityState.Modified;
dbContext.SaveChanges();
return(kunde);
}
catch (DbUpdateConcurrencyException ex)
{
throw ManagerBase.CreateOptimisticConcurrencyException <Kunde>(dbContext, kunde);
}
}
}
protected static OptimisticConcurrencyException <T> CreateOptimisticConcurrencyException <T>(KundenReservationContext context, T entity)
where T : class
{
var dbEntity = (T)context.Entry(entity)
.GetDatabaseValues()
.ToObject();
return(new OptimisticConcurrencyException <T>($"Update {typeof(T).Name}: Concurrency-Fehler", dbEntity));
}
public static void InitializeTestData()
{
using (KundenReservationContext context = new KundenReservationContext())
{
var luxusklasseAutoTableName = context.GetTableName <LuxusklasseAuto>();
var mittelklasseAutoTableName = context.GetTableName <MittelklasseAuto>();
var standardAutoTableName = context.GetTableName <StandardAuto>();
var autoTableName = context.GetTableName <Auto>();
var kundeTableName = context.GetTableName <Kunde>();
var reservationTableName = context.GetTableName <Reservation>();
try
{
// Delete all records from tables
// > Cleanup for specific subtypes necessary when not using table per hierarchy (TPH)
// since entities will be stored in different tables.
if (luxusklasseAutoTableName != autoTableName)
{
context.DeleteAllRecords(luxusklasseAutoTableName);
}
if (mittelklasseAutoTableName != autoTableName)
{
context.DeleteAllRecords(mittelklasseAutoTableName);
}
if (standardAutoTableName != autoTableName)
{
context.DeleteAllRecords(standardAutoTableName);
}
context.DeleteAllRecords(reservationTableName);
context.DeleteAllRecords(autoTableName);
context.DeleteAllRecords(kundeTableName);
// Reset the identity seed (Id's will start again from 1)
context.ResetEntitySeed(luxusklasseAutoTableName);
context.ResetEntitySeed(mittelklasseAutoTableName);
context.ResetEntitySeed(standardAutoTableName);
context.ResetEntitySeed(autoTableName);
context.ResetEntitySeed(kundeTableName);
context.ResetEntitySeed(reservationTableName);
// Temporarily allow insertion of identity columns (Id)
context.SetAutoIncrementOnTable(luxusklasseAutoTableName, true);
context.SetAutoIncrementOnTable(mittelklasseAutoTableName, true);
context.SetAutoIncrementOnTable(standardAutoTableName, true);
context.SetAutoIncrementOnTable(autoTableName, true);
context.SetAutoIncrementOnTable(kundeTableName, true);
context.SetAutoIncrementOnTable(reservationTableName, true);
// Insert test data
context.Autos.AddRange(Autos);
context.Kunden.AddRange(Kunden);
context.Reservationen.AddRange(Reservationen);
context.SaveChanges();
}
catch (Exception ex)
{
throw new ApplicationException("Error while re-initializing database entries.", ex);
}
finally
{
// Disable insertion of identity columns (Id)
context.SetAutoIncrementOnTable(luxusklasseAutoTableName, false);
context.SetAutoIncrementOnTable(mittelklasseAutoTableName, false);
context.SetAutoIncrementOnTable(standardAutoTableName, false);
context.SetAutoIncrementOnTable(autoTableName, false);
context.SetAutoIncrementOnTable(kundeTableName, false);
context.SetAutoIncrementOnTable(reservationTableName, false);
}
}
}
