public List<ReservationsByDate> GetReservationsByDate(string reservationDate)
{
using (var context = new eRestaurantContext())
{
//Linq is not very playfull or cooperative with
//Date Time
//extract the year, month and day ourselfs
//out of the passed parameter value
int theYear = (DateTime.Parse(reservationDate)).Year;
int theMonth = (DateTime.Parse(reservationDate)).Month;
int theDay = (DateTime.Parse(reservationDate)).Day;
var results = from eventItem in context.SpecialEvents
orderby eventItem.Description
select new ReservationsByDate() //a new instance for each specialEvent row on the table
{
Description = eventItem.Description,
Reservations = from row in eventItem.Reservations
where row.ReservationDate.Year == theYear
&& row.ReservationDate.Month == theMonth
&& row.ReservationDate.Day == theDay
select new ReservationDetail() // a new instance for each reservation of a particular specialEvent code.
{
CustomerName = row.CustomerName,
ReservationDate = row.ReservationDate,
NumberInParty = row.NumberInParty,
ContactPhone = row.ContactPhone,
ReservationStatus = row.ReservationStatus
}
};
return results.ToList();
}
}
public DateTime GetLastBillDateTime()
{
using (var context = new eRestaurantContext())
{
var result = context.Bills.Max(eachBillrow => eachBillrow.BillDate);
return result;
}
}
public List<Reservation> GetReservationsByEventCode(string eventcode)
{
// connect to our DbContext class in the DAL
// create and instance of the class.
// we will use a transaction to hold our query
using (var context = new eRestaurantContext())
{
//Query Syntax
var results = from item in context.Reservations
where item.EventCode.Equals(eventcode)
orderby item.CustomerName, item.ReservationDate
select item;
return results.ToList();
}
}
public Waiter GetWaiterByID(int waiterid)
{
// connect to our DbContext class in the DAL
// create and instance of the class.
// we will use a transaction to hold our query
using (var context = new eRestaurantContext())
{
// method syntax
//return context.SpecialEvents.OrderBy(x => x.Description).ToList();
//Query Syntax
var results = from item in context.Waiters
where item.WaiterID == waiterid
select item;
return results.FirstOrDefault(); // one row at most
}
}
public void Waiter_Update(Waiter item)
{
using (eRestaurantContext context = new eRestaurantContext())
{
// Indicate the updating item instance
// alter the Modified Status flag for this instance
context.Entry<Waiter>(context.Waiters.Attach(item)).State = System.Data.Entity.EntityState.Modified;
// command is not executed until it is actually saved.
context.SaveChanges();
}
}
public void Waiter_Delete(Waiter item)
{
using (eRestaurantContext context = new eRestaurantContext())
{
// Lookup the instance and record if found
Waiter existing = context.Waiters.Find(item.WaiterID);
// Setup the command to execute the delete
context.Waiters.Remove(existing);
//command is not executed until it is actually saved.
context.SaveChanges();
}
}
public List<Waiter> Waiters_List()
{
// connect to our DbContext class in the DAL
// create and instance of the class.
// we will use a transaction to hold our query
using (var context = new eRestaurantContext())
{
// method syntax
//return context.SpecialEvents.OrderBy(x => x.Description).ToList();
//Query Syntax
var results = from item in context.Waiters
orderby item.LastName, item.FirstName
select item;
return results.ToList(); //none, 1 or more rows
}
}
public int Waiters_Add(Waiter item)
{
using (eRestaurantContext context = new eRestaurantContext())
{
/* These methods are executed using an instance level item
* set up a instance pointer and initialize to null */
Waiter added = null;
// setup the command to execute the add
added = context.Waiters.Add(item);
// command is not executed until it is actually saved.
context.SaveChanges();
// The waiter instance added contains the newly inserted
// record to sql including the generated primary key value
return added.WaiterID;
}
}
public void SpecialEvents_Delete(SpecialEvent item)
{
using (eRestaurantContext context = new eRestaurantContext())
{
// Lookup the instance and record if found
SpecialEvent existing = context.SpecialEvents.Find(item.EventCode);
// Setup the command to execute the delete
context.SpecialEvents.Remove(existing);
//command is not executed until it is actually saved.
context.SaveChanges();
}
}
public void SpecialEvents_ADD(SpecialEvent item)
{
using (eRestaurantContext context = new eRestaurantContext())
{
/* These methods are executed using an instance level item
* set up a instance pointer and initialize to null */
SpecialEvent added = null;
// setup the command to execute the add
added = context.SpecialEvents.Add(item);
// command is not executed until it is actually saved.
context.SaveChanges();
}
}
