Creating a Collection using CollectionBase

In a purchase, you have to collect many different types of addresses: billing, shipping and credit. Rather than have a separate class for each address, create a single class to hold address information and include an address type. You then can create a collection of the Address objects and assign it to a customer. Here is an example:

Public Enum OrderAddressType
    Billing
    Credit
    Shipping
End Enum

Public Class OrderAddress
    Public orderAddressType As OrderAddressType
    Public strFirstName As String
    Public strMI As String
    Public strLastName As String
    Public strStreet1 As String
    Public strStreet2 As String
    Public strCity As String
    Public strStateProv As String
    Public strPostalCode As String
    Public strCountry As String
End Class

Public Class OrderAddressCollection
    Inherits System.Collections.CollectionBase

    Public Sub Add(ByVal oa As OrderAddress)
        List.Add(oa)
    End Sub

    Public Sub Remove(ByVal index As Integer)
        If index > Count - 1 Or index < 0 Then
            'ignore request
        Else
            List.RemoveAt(index)
        End If
    End Sub

    Default Public ReadOnly Property Item(ByVal index As Integer) As OrderAddress
        Get
            Return CType(list.Item(index), OrderAddress)
        End Get
    End Property

End Class

In the code above, CollectionBase was used as the base of the collection. In a simple Collection you only have the ability to identify the items in the collection by their location. If you need to identify the items in the collection by something other than the numeric index, then you have to use a DictionaryBase.

In my next post, I will give an examples of using DictionaryBase which I am working on now.

Comments

[jelling]

I'm looking forward to seeing your post on using the dictionarybase to do the same thing. I've been trying to figure it out all night but wasn't ablet to set the text and value fields on the dropdownlist. I switch to using an arraylist and it works fine. I know I must be missing something.

[Jason]

I'll be posting a DictionaryBase example soon. I was delayed in writing my post since things have been so busy lately. I am working on it now.

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[Kudick]

いや Raw String Literal全体に対して 逆変換がかかるようにするのです つまり d-char-sequenceに対しても 逆変換がかかります そもそも プリプロセッサは string ltareilを 認識できなければならないのです だから プリプロセスを始める前に raw string ltareilかどうかは 分かるのです そもそも 規格というのは 具体的な実装方法を定義しているのではなくて 意味を定義しているのです 規格と同じ結果になれば どんな実装方法でもいいのです

[Paloma]

this is simplest way to do it but there are betetr ways too :BufferedReader in= new BufferedReader (new InputStreamReader (System.in)); String s = in.readLine(); for (int i=0; i

[Mark]

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