Problem on mapping custom collection class

[Kevin]

Hi,

I 'm encountered a problem while i'm mapping a property that is a custom collection class Similar post i found in the forum is 
Strongly typed collection classes and OpenAccess forward mapping

The solution gave above is changed the data type of property from custom collection class to IList(of Object). But how if i want to maintain the structure of my classes and map it with OA? I want all the collection property refer to a custom collection class, so that i can add some generic function in it.

These are my classes.

BusinessBase Class:

Public MustInherit Class BusinessBase
    Private _IsValid As Boolean = False
    Public Property IsValid() As Boolean
        Get
            Return _IsValid
        End Get
        Set(ByVal value As Boolean)
            _IsValid = value
        End Set
    End Property
    Public Overridable Sub Validate()
    End Sub
End Class

BusinessCollection Class:

Imports System.Collections.ObjectModel
Public Class BusinessCollectionBase(Of T As BusinessBase)
    Inherits Collection(Of T)

End Class

Guest Class: Here is the Addresses property refered to custom collection class

<Telerik.OpenAccess.Persistent(IdentityField:="_Guest_Id")> _

Public Class Guest

Inherits BusinessBase

Private _Guest_Id As String = String.Empty

Private _FirstName As String = String.Empty

Private _LastName As String = String.Empty

Private _GuestTypeId As String = String.Empty

<Telerik.OpenAccess.Transient()> _ 'Turn off as i don't know how to map it

Private _Addresses As AddressCollection

<Telerik.OpenAccess.FieldAlias("_Guest_Id")> _

Public Property Guest_Id() As String

Get

Return _Guest_Id

End Get

Set(ByVal value As String)

_Guest_Id = value

End Set

End Property

<Telerik.OpenAccess.FieldAlias("_FirstName")> _

Public Property FirstName() As String

Get

Return _FirstName

End Get

Set(ByVal value As String)

_FirstName = value

End Set

End Property

<Telerik.OpenAccess.FieldAlias("_LastName")> _

Public Property LastName() As String

Get

Return _LastName

End Get

Set(ByVal value As String)

_LastName = value

End Set

End Property

Public Property Addresses() As AddressCollection

Get

Return _Addresses

End Get

Set(ByVal value As AddressCollection)

_Addresses = value

End Set

End Property

End Class

Address Class:

<Telerik.OpenAccess.Persistent(IdentityField:="_Id")> _
Public Class Address
    Inherits BusinessBase

    Private _Id As String
    <Telerik.OpenAccess.FieldAlias("_Id")> _
    Public Property Id() As String
        Get
            Return _Id
        End Get
        Set(ByVal value As String)
            _Id = value
        End Set
    End Property

    ...

    Private _Guest_Id As String
    <Telerik.OpenAccess.FieldAlias("_Guest_Id")> _
    Public Property Guest_Id() As String
        Get
            Return _Guest_Id
        End Get
        Set(ByVal value As String)
            _Guest_Id = value
        End Set
    End Property

End Class

AddressCollection Class:

Public Class AddressCollection
    Inherits BusinessCollectionBase(Of Address)

End Class

[Jan Blessenohl]

Hello Kevin,
OpenAccess cannot persist all types of collections because we need some functionality for our lazy loading and change tracking implementation.

You have to derive your own collection implementation from our TrackedList<T> or TrackedBindingList<T>.

Sincerely yours,
Jan Blessenohl
the Telerik team

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