public static Cur_booking_Singleton Instance(booking_class book)
{
if (instance == null)
{
instance = new Cur_booking_Singleton();
instance.book = book;
return(instance);
}
else
{
instance.book = book;
return(instance);
}
}
public booking_class Select_booking(int booking_ref, int cust_ref)
//Method to select the booking, since each booking has a customer associated with it the customer reference must also be used
{
Cur_customer_Singleton cur_cust = Cur_customer_Singleton.Instance();
sql = "SELECT * FROM booking WHERE booking_ref=" + booking_ref + " AND cust_ref=" + cust_ref + ";"; //Query to find the correct booking given the correct customer reference
cmd.CommandText = sql;
sdr = cmd.ExecuteReader();
bool bookExists = false;
booking_class book = new booking_class();
while (sdr.Read()) //while the data reader is reading through the database
{
if (sdr.GetString(0) == booking_ref.ToString())
/*
* This if statement will ensure that the booking reference in the database will be equal to the booking reference in the c#
* The booking class will have the data from the database saved to the corresponding variable in the booking_class
* Ref = first column of the database (i.e the booking reference) etc.
*/
{
bookExists = true;
book.Ref = Int32.Parse(sdr.GetString(0));
book.Arrivaldate = sdr.GetString(1);
book.DepDate = sdr.GetString(2);
book.Num_of_guests = sdr.GetString(3);
}
}
sdr.Close(); //data reader is no longer in use, therfore close it
if (bookExists == false)
//Error checking ensuring that the booking reference exists.
{
MessageBox.Show("Booking does not exist given the selected reference number.");
}
else
{
Cur_booking_Singleton cur_booking = Cur_booking_Singleton.Instance(book);
Booking bookingWin = new Booking(); //creating a new booking window
bookingWin.Show(); //open the booking window
bookingWin.txtBox_booking_ref.Text = book.Ref.ToString(); //set the text box value, booking ref, to the booking reference
bookingWin.datepicker_arrival.Text = book.Arrivaldate; //The arrival date is already a string and therefore does not need to be converted into a string
bookingWin.datepicker_dep.Text = book.DepDate;
bookingWin.txtBox_num_of_guests.Text = book.Num_of_guests;
}
return(book);
}