Creating instances of classes at runtime

Question

1. I have created a class (ConflictingBooking) that contains fields for various information in regards to a specific reservation.
2. I loop through a database and select certain reservations based on certain criteria.
3. I want to create an instance of the class with that selected certain criteria.
4. I then want to add each of those class instances to a List which I will use elsewhere.

Problem I have is at step 3. I want to name the new instance something like "found[i]" where i is incremented for each reservation found:

              ConflictingBooking found = new ConflictingBooking();
              found.BookingNumber = conflictingBookingNumber;
              found.BookingStarts = conflictingBookingDT;

              conflictingBookings.Add(found);

In the above code, I need to replace 'found' programatically.

Whilst I would appreciate a simple code snippet to follow, I would also like to read some reference so I know what I'm doing :-). I just don't know how to google my problem.

Seems I have not been entirely clear - here is the appropriate code:

      dbManager.Open();
      dbManager.ExecuteReader(CommandType.Text, string.Format("SELECT BookingDate, {0} FROM BTable WHERE Court IN {1} AND BookingDate IN ({2})", columns, facilityIDs, bookingDates));
      using (IDataReader rdr = dbManager.DataReader)
      {
        decimal conflictingBookingNumber = 0;
        DateTime conflictingBookingDT;
        object result = null;
        while (rdr.Read())
        {
          for (int i = 0; i < requestedColumnNames.Count; i++)
          {
            result = dbManager.DataReader[requestedColumnNames[i].ToString()];
            if (result != null)
              conflictingBookingNumber = Convert.ToDecimal(result);

            result = dbManager.DataReader["BookingDate"];
            if (result != null)
              conflictingBookingDT = Convert.ToDateTime(result);

            if (conflictingBookingNumber > 0)
            {
              int next = conflictingBookings.Count + 1;


              ConflictingBooking found = new ConflictingBooking();
              found.BookingNumber = conflictingBookingNumber;
              found.BookingStarts = conflictingBookingDT;

              // conflictingBookings is a List<conflictingBooking>
              conflictingBookings.Add(found);
            }
          }
        }
      }

Hope that clarifies my problem.

Answer 1

I think all you are looking for is to put your code in a for loop. I might be completely misunderstanding you but it seems as if you want to do something like this

int i = 0;
foreach(var result in resultSet)
{ 
    ConflictingBooking found = new ConflictingBooking();
    found.BookingNumber = conflictingBookingNumber;
    found.BookingStarts = conflictingBookingDT;
    found.Name = "found["+i++ +"]";

    conflictingBookings.Add(found);
}

If that's not what you want please clarify your question

Answer 2

Variable names only exist as a matter of convenience to the programmer, and don't really exist at runtime. You cannot produce actual variables at runtime.

Because you're populating a list, however, you should have all the data required to produce a "name" for display purposes based on the index. For example:

for(int i = 0; i < conflictingBookings.Length; i++)
{
    Console.WriteLine("found[" + i + "]: " + found.BookingNumber);
}

Answer 3

Simple solution: Add the loop counter to your constructor:

ConflictingBooking found = new ConflictingBooking(i); 

Then add a method (or override ToString() ) to return the string concatenated instance name.