Use ArrayList to Store your own class
Imports System
Imports System.Collections
Public Class MainClass
Shared Sub Main(ByVal args As String())
Dim empArray As New ArrayList( )
Dim intArray As New ArrayList( )
' populate the arraylists
Dim i As Integer
For i = 0 To 4
empArray.Add(New EnumerableClass("A", "B"))
intArray.Add((i * 5))
Next i
' print each member of the array
For Each i In intArray
Console.Write("{0} ", i.ToString( ))
Next i
Console.WriteLine(ControlChars.Lf)
' print each employee
Dim e As EnumerableClass
For Each e In empArray
Console.Write("{0} ", e.ToString( ))
Next e
Console.WriteLine(ControlChars.Lf)
Console.WriteLine("empArray.Capacity: {0}", empArray.Capacity)
End Sub
End Class
Public Class EnumerableClass : Implements IEnumerable
Private strings( ) As String
Private ctr As Integer = 0
Private Class MyEnumerator
Implements IEnumerator
Private currentListBox As EnumerableClass
Private index As Integer
Public Sub New(ByVal currentListBox As EnumerableClass)
Me.currentListBox = currentListBox
index = -1
End Sub
Public Function MoveNext( ) As Boolean _
Implements IEnumerator.MoveNext
index += 1
If index >= currentListBox.strings.Length Then
Return False
Else
Return True
End If
End Function
Public Sub Reset( ) _
Implements IEnumerator.Reset
index = -1
End Sub
Public ReadOnly Property Current( ) As Object _
Implements IEnumerator.Current
Get
Return currentListBox(index)
End Get
End Property
End Class ' end nested class
Public Function GetEnumerator( ) As IEnumerator _
Implements IEnumerable.GetEnumerator
Return New MyEnumerator(Me)
End Function
Public Sub New( _
ByVal ParamArray initialStrings( ) As String)
ReDim strings(7)
Dim s As String
For Each s In initialStrings
strings(ctr) = s
ctr += 1
Next
End Sub
Public Sub Add(ByVal theString As String)
strings(ctr) = theString
ctr += 1
End Sub
Default Public Property Item( _
ByVal index As Integer) As String
Get
If index < 0 Or index >= strings.Length Then
' handle bad index
Exit Property
End If
Return strings(index)
End Get
Set(ByVal Value As String)
strings(index) = Value
End Set
End Property
Public Function GetNumEntries( ) As Integer
Return ctr
End Function
End Class
Related examples in the same category
