Question

I have an object called Reservations. Inside Reservations, there is a another object called Reservation that is an array.

When I do something like the following:

reservations.Reservation[i] = new Reservation(); //reservations if of type Reservations

I get the following error:

Cannot find the method on the object instance

A couple things I noticed is that when I get to this point, it throws an IndexOutOfRangeError and if I hover over the reservations variable, it shows a number.

VB Code

Public Class Reservations
{
    Private RerservationField() as Reservation

    Public Property Reservation() as Reservation()
        Get
            Return Me.ReservationField
        End Get
        Set
            Me.ReservationId = value
        End Set
    End Property
}

Dim reservations As New Reservations()
ReDim reservations.Reservation(0)

Dim i as Integer = 0

reservations.Reservation(i) = New Reservation()

C# Code

public class Reservations
{
    Reservation[] reservation {get;set;}
}

Reservations reservations = new Reservations();
reservations.Reservation = new Reservation[0];
int i = 0;

The VB Code and C# Code, it is instantiating the length of the array based on an xml request. So in the vb code, it was doing this:

 ReDim reservations.Reservation(rq.Reservations.Reservation.Length - 1)

and in the c# code, it was doing this:

reservations.Reservation(rq.Reservations.Reservation.Length - 1).

Is the above my problem. I need to do:

reservations.Reservation(rq.Reservations.Reservation.Length)

rq is the request.

Answer 1

Your line:

reservations.Reservation = new Reservation[0];

Will create an array of max length 0? Which will basically be non null, but empty..

You need to instantiate the reservations.Reservation array (SIZE would be how large you want it). You do not** need to -1 from your length. If you specify new Array[1] it will be able to hold 1 element, 2 2 elements, etc.

Reservations reservations = new Reservations();
size = rq.Reservations.Reservation.Length
reservations.Reservation = new Reservation[size ];
reservations.Reservation[0] = new Reservation();

You could do it in the constructor if you want:

public class Reservations
{
  Reservation[] reservation {get;set;}
  public Reservations(int size){
    reservation  = new Reservation[size];
  }
}

Then the middle step would no longer be needed i.e.:

Reservations reservations = new Reservations(rq.Reservations.Reservation);
reservations.Reservation[0] = new Reservation();

---

Note you should look into using a more advanced collection List

public class Reservations
{
  List<Reservation> reservation {get;set;}
  public Reservations(){
    reservation  = new List<Reservation>();
  }
}

And if you need it as an array you can just do

 reservation.Reservations.ToArray();

and to insert it would be

 reservation.Reservations.Add(theReservation);