[RESOLVED] Return listview item collection in multithread?

[Disyne]

I am doing this within a thread:

 For Each item As ListViewItem In lvUsers.Items

and I am getting: Cross-thread operation not valid: Control 'lvUsers' accessed from a thread other than the thread it was created on.

I have been able to adjust a control in a way using something like:

 Public Delegate Sub ListAddNameInvoker(ByVal text As String)
    Public Sub ListAddName(ByVal text As String)
        If lvUsers.InvokeRequired Then
            lvUsers.Invoke(New ListAddNameInvoker(AddressOf ListAddName), text)
        Else
            lvUsers.Items.Add(text)
        End If
    End Sub

But how do I get data from a control and pass it to another thread?

[tassa]

Check out this thread, might help you out .

[jmcilhinney]

You can't get data from a control in other than the UI thread. As such, you will need to get all the data you require out of the ListView first, into an array or collection, and then pass that data to the method that you execute on the secondary thread. For one way of doing that check out this. You might also use a BackgroundWorker and pass an argument to the RunWorkerCompleted method, or you might also use the ThreadPool and pass a second argument to the QueueUserWorkItem method.