[2005] loop through arraylist [resolved]

[texas]

this should be simple enough... what is the correct way to loop through an arraylist?

    Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
        Dim CorpGroups As ArrayList = Groups.GetGroupNums

        PrintValues(CorpGroups)

        With Me.DataGridView1
            .DataSource = CorpGroups
        End With

    End Sub

    Public Shared Sub PrintValues(ByVal myList As IEnumerable)
        Dim myEnumerator As System.Collections.IEnumerator = myList.GetEnumerator()

        While myEnumerator.MoveNext()
            Console.Write(ControlChars.Tab + "{0}", myEnumerator.Current)
        End While

        Console.WriteLine()

    End Sub

Console.Write outputs this:
GroupReportsFolderCreator.Groups

but the GridView has the correct info:

corp_num  group_num
123            1586
123            1587

[mendhak]

What is the problem, and do you need to use the Enumerator?

[texas]

i'm just trying to loop through the arraylist(both columns).

and do you need to use the Enumerator?
i'm open to anything at this point.

[jmcilhinney]

Don't use an enumerator explicitly. Enumerators exist mainly to facilitate the use of For Each loops. That means that you should use a For Each loop. Also, if each item in the ArrayList is an object with two properties then you must refer to those two properties to get their values.:

For Each item As Groups In myArrayList
    Console.WriteLine(item.CorpNum & ControlChars.Tab & item.GroupNum)
Next item

Also, you should generally avoid ArrayLists in VB 2005. If you want a collection of Groups objects then you should use a List(Of Groups). The Generic.List class is basically the same as an ArrayList but allows you to specify a type for the items when you declare it, making it strongly typed, unlike the ArrayList that will accept any objects.

[texas]

thank you and i'm looking into the Generic.List.