Question

This is a followup question to another question I asked earlier. I thought I had everything I needed, but I’m running into another issue. I’m trying to use a custom listviewitem class that attaches additional information to a lisview item. Here is the class:

Public Class albumListViewItem
    Inherits ListViewItem
    Public hash As String
    Public id As Integer
    Public provider As String
    Public providerID As String
    Public providerURL As String
    Public providerArtistID As String
    Public albumName As String
    Public albumType As String
    Public numTracks As Integer
    Public imageURLs() As String
    Public genres() As String
    Public styles() As String
    Public label As String
    Public year As String
    Public country As String
    Public rating As String
    Public editorsPick As Boolean
    Public sampleStreamURL As String
    Public providerReview As String
End Class

When I try to cast a listviewitem to my custom class like this:

Dim albumItem As albumListViewItem = CType(lsvHidden.items.item(0), albumListViewItem)

I get the following error, “Unable to cast object of type ‘System.Windows.Forms.ListViewItem’ to type ‘AudioMatic.albumListViewItem’.”

What am I missing here?

Answer 1

From your previous question and this one, I think a better fit for your problem would be to use a regular ListViewItem and store the accessory information in ListViewItem.Tag

You can do

Dim listViewItem As New ListViewItem("SomeText")
Dim albumInfo As New albumListViewItem()

albumInfo.albumName = "SomeAlbum"
...
listViewItem.Tag = albumInfo

listView1.Items.Add(listViewItem)

and then retrieve it like this

Dim selectedItem As ListViewItem = listView1.SelectedItems(0).Item
Dim alubmInfo As albumListViewItem = TryCast(selectedItem.Tag, alubmListViewItem)

Dim albumName as String = albumInfo.albumName

see if this solution will work for you.