private static void CallStoredProc() {
using (AutoLotEntities context = new AutoLotEntities()) {
ObjectParameter outParam = new ObjectParameter("petName", typeof(string));
context.GetPetName(83, outParam);
Console.WriteLine(outParam.Value);
}
}
private static void AddNewCars(IEnumerable <Car> carsToAdd)
{
using (var context = new AutoLotEntities())
{
context.Cars.AddRange(carsToAdd);
context.SaveChanges();
}
}
private static void PrintCars(string make)
{
using (var context = new AutoLotEntities())
{
Console.WriteLine($"-------------- Cars With Make={make} ------------------");
foreach (var item in context.Cars.Where(c => c.Make == make))
{
Console.WriteLine(item);
}
}
}
private static void PrintCar(int key)
{
Console.WriteLine($"-------------- Cars With Key = {key} ------------------");
using (var context = new AutoLotEntities())
{
Console.WriteLine(context.Cars.Find(key));
}
Console.WriteLine($"------------------------------------------");
}
private static void PrintAllInventory()
{
Console.WriteLine($"-------------- All Cars ------------------");
using (var context = new AutoLotEntities())
{
foreach (var item in context.Cars)
{
Console.WriteLine(item);
}
}
Console.WriteLine($"------------------------------------------");
}
private static void PrintAllInventoryNonTrackableCode()
{
using (var context = new AutoLotEntities())
{
string sql = @"SELECT CarId,Make,Color,PetName as CarNickName FROM Inventory";
Console.WriteLine($"-------------- All Cars in Inventory ------------------");
foreach (var item in context.Cars.SqlQuery(sql))
{
Console.WriteLine(item);
}
}
}
private static void PrintCurtomerOrders(string custID) {
int id = int.Parse(custID);
using (AutoLotEntities context = new AutoLotEntities()) {
var carsOnOrder = from o in context.Orders
where o.CustID == id
select o.Inventory;
Console.WriteLine(string.Format("Customer has {0} orders pending", carsOnOrder.Count()));
foreach (var item in carsOnOrder) {
Console.WriteLine("-> {0} {1} named {2}.", item.Color, item.Make, item.PetName);
}
}
}
private static void PrintCars(params int[] keys)
{
Console.WriteLine($"-------------- Cars With Keys {string.Join(", ", keys)} ------------------");
using (var context = new AutoLotEntities())
{
foreach (var item in context.Cars.Where(c => keys.Contains(c.CarId)))
{
Console.WriteLine(item);
}
}
Console.WriteLine($"------------------------------------------");
}
// Chaining Linq Queries
private static void ChainingLinqQueries()
{
using (var context = new AutoLotEntities())
{
//Not executed
DbSet <Car> allData = context.Cars;
//Not Executed.
var colorsMakes = from item in allData select new { item.Color, item.Make };
//Now it's executed
foreach (var item in colorsMakes)
{
Console.WriteLine(item);
}
}
}
private static void PrintWithLINQ2()
{
using (var context = new AutoLotEntities())
{
Console.WriteLine($"-------------- Cars Using LINQ ------------------");
// Get a projection of new data.
var shortCars = from car in context.Cars select new { car.CarNickName, car.Color };
foreach (var item in shortCars)
{
Console.WriteLine($"Anonymous Type: Name={item.CarNickName},\t Color={item.Color}");
}
}
}
private static void PrintCarsWithMakeNonTrackableCode(string make)
{
using (var context = new AutoLotEntities())
{
string sql =
@"SELECT CarId, Make, Color, PetName AS CarNickName
FROM Inventory
WHERE Make= @P0
";
Console.WriteLine($"-------------- Cars With Make={make} ------------------");
foreach (var item in context.Cars.SqlQuery(sql, make))
{
Console.WriteLine(item);
}
}
}
private static void PrintWithLINQ()
{
using (var context = new AutoLotEntities())
{
Console.WriteLine($"-------------- Cars Using LINQ ------------------");
var query = from car in context.Cars
where car.CarId == 1 || car.CarId == 2
select car;
foreach (var item in query)
{
Console.WriteLine(item);
}
}
}
private static void CallStoredProc()
{
using (AutoLotEntities context = new AutoLotEntities())
{
ObjectParameter input = new ObjectParameter("carID", 83);
ObjectParameter output = new ObjectParameter("petName", typeof(string));
// Call ExecuteFunction off the context....
context.ExecuteFunction("GetPetName", input, output);
// ....or use the strongly typed method on the context.
context.GetPetName(83, output);
Console.WriteLine("Car #83 is named {0}", output.Value);
}
}
private static int AddNewCar(Car car)
{
using (AutoLotEntities context = new AutoLotEntities())
{
try
{
context.Cars.Add(car);
context.SaveChanges();
// On a successful save, EF populates the database generated identity field.
return(car.CarId);
}
catch (Exception ex)
{
Console.WriteLine(ex.InnerException?.Message);
return(0);
}
}
}
private void ConfigureGrid()
{
using (AutoLotEntities context = new AutoLotEntities())
{
// Build a LINQ query that gets back some data from the Inventory table.
var dataToShow = from c in context.Inventories select new { c.CarID, c.Make, c.Color, c.PetName };
this.gridInventory.ItemsSource = dataToShow;
}
}
