Populating a structure w/in an array

[kmann]

Hello, this is my first post to this forum. Please forgive me if I am repeating a question or am posting in the wrong area.
Here's my dilemma.

I have declared a structure and an array on my module as such:

    Friend Structure stcOrder
        Friend strArtist As String
        Friend strTitle As String
        Friend intTracks As Integer
        Friend decPrice As Decimal
    End Structure
    Friend aryOrder() As stcOrder

On a child form, I have data from a database that populates related lables upon a selected index change from a combobox.
What I'd like to do is allow the user to add the data that is populated to the array/structure, change the selected index/data and add the newly populated date to the next index of the array/structure. This is what I have for that code:

    Private Sub btnAdd_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnAdd.Click
        aryOrder(intI).strArtist = cboArtists.Text
        aryOrder(intI).strTitle = lblTitle.Text
        aryOrder(intI).intTracks = lblTracks.Text
        aryOrder(intI).decPrice = decPrice
        intI += 1
    End Sub

In the execution, when I click on the Add button, I get the following error:
An unhandled exception of type 'System.NullReferenceException' occurred in Kens Music.exe

Additional information: Object reference not set to an instance of an object.


Do I need to declare an instance of the structure/array before i I can use it?

If anyone can help me, that would be super.
Thanks.

 

[a_jam_sandwich]

Why not use the Arraylist instead much easyier I've attached an example

Andy

 

[Volte]

Try adding the line Redim Preserve aryOrder(intI) before you set
the stuff in the array.

 

[kmann]

Got it thanks! The redim was the way to go.