public static void Run_Audit()
{
using (var ctx = new DA.WWWingsContext())
{
ctx.Log();
var flightSet = ctx.FlightSet.Where(x => x.Departure == "Berlin").ToList();
foreach (var f in flightSet)
{
f.FreeSeats--;
f.Memo = "Last change: " + DateTime.Now;
}
var audit = new Audit();
ctx.SaveChanges(audit);
// Changes stehen nun im audit-Objekt bereit
foreach (var a in audit.Entries)
{
Console.WriteLine("---------------" + a.Entity.ToString());
foreach (var p in a.Properties)
{
Console.WriteLine(p.PropertyName + ": " + p.OldValue + "->" + p.NewValue);
}
}
}
}
public static void EFPlus_FutureQuery()
{
CUI.MainHeadline(nameof(EFPlus_FutureQuery));
using (var ctx = new DA.WWWingsContext())
{
ctx.Log();
CUI.Headline("Define three future queries ... nothing happens in the database");
QueryFutureEnumerable <Pilot> qAllePilots = ctx.PilotSet.Future();
QueryFutureEnumerable <Flight> qflightSetRome = ctx.FlightSet.Where(x => x.Departure == "Rome").Future();
QueryFutureEnumerable <Flight> qFlightSetBerlin = ctx.FlightSet.Where(x => x.Departure == "Berlin").Future();
CUI.Headline("Access the pilots:");
var allePilots = qAllePilots.ToList();
Console.WriteLine(allePilots.Count + " Pilots are loaded!");
CUI.Headline("Access the flights from Rome:");
var flightSetRom = qflightSetRome.ToList();
Console.WriteLine(flightSetRom.Count + " flights from Berlin are loaded!");
CUI.Headline("Define another two future queries ... nothing happens in the database");
QueryFutureEnumerable <Flight> qFugSetLondon = ctx.FlightSet.Where(x => x.Departure == "London").Future();
QueryFutureEnumerable <Flight> qflightSetParis = ctx.FlightSet.Where(x => x.Departure == "Paris").Future();
CUI.Headline("Access the flights from Berlin:");
var flightSetBerlin = qFlightSetBerlin.ToList();
Console.WriteLine(flightSetBerlin.Count + " flights from Rome are loaded!");
CUI.Headline("Access the flights from London:");
var flightSetLondon = qFugSetLondon.ToList();
Console.WriteLine(flightSetLondon.Count + " flights from London are loaded!");
CUI.Headline("Access the flights from Paris:");
var flightSetParis = qflightSetParis.ToList();
Console.WriteLine(flightSetParis.Count + " flights from Paris are loaded!");
}
}
public static void EFPlus_FutureQuery_SingleObjectsAndValues()
{
CUI.MainHeadline(nameof(EFPlus_FutureQuery_SingleObjectsAndValues));
using (var ctx = new DA.WWWingsContext())
{
ctx.Log();
CUI.Headline("Define three future queries ... nothing happens in the database");
QueryFutureValue <int> qPilotCount = ctx.PilotSet.DeferredCount().FutureValue();
QueryFutureValue <DateTime?> qBirthdayOfOldestPilot = ctx.PilotSet.DeferredMin(x => x.Birthday).FutureValue();
QueryFutureValue <Pilot> qOldestPilot = ctx.PilotSet.OrderBy(x => x.Birthday).DeferredFirstOrDefault().FutureValue();
CUI.Headline("We need the values now!");
Console.WriteLine("Number of pilots: " + qPilotCount.Value);
Console.WriteLine("Birthday of oldest pilot: " + qBirthdayOfOldestPilot.Value.Value.ToShortDateString());
Console.WriteLine("Name of of oldest pilot: " + qOldestPilot.Value.FullName);
}
}
public static void Run_Caching()
{
var ctx = new DA.WWWingsContext();
ctx.Log();
for (int i = 0; i < 10; i++)
{
//QueryCacheManager.
// The query is cached using default QueryCacheManager options
var flightSet1 = ctx.FlightSet.Where(x => x.Departure == "Rome").FromCache();
Console.WriteLine(flightSet1.Count());
// (EF7) The query is cached for 2 hours without any activity
var options = new MemoryCacheEntryOptions()
{
SlidingExpiration = TimeSpan.FromHours(2)
};
var flightSet2 = ctx.FlightSet.Where(x => x.Departure == "Rome").FromCache();
Console.WriteLine(flightSet2.Count());
}
}
public static void Run_Filter()
{
// CREATE global filter
QueryFilterManager.Filter <Flight>(x => x.Where(c => c.Departure == "Rome"));
var ctx = new DA.WWWingsContext();
ctx.Log();
// TIP: Add this line in EntitiesContext constructor instead
QueryFilterManager.InitilizeGlobalFilter(ctx);
// SELECT * FROM Customer WHERE IsActive = true
var customer = ctx.FlightSet.ToList();
foreach (var f in customer)
{
Console.WriteLine(f);
}
}
