Insert rows in my listview from a thread - vb.net

Question

I have to create a really simple application in vb. My app contains a button and a listview. In my application i have to run threads, and insert in a listview the name and time of the thread executed. My code starts when i click on the threading button
my code is the following
Private Sub btnThreading_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnThreading.Click
Try
For index = 0 To 3
Dim th As New Threading(index)
Me.Invoke(New DoStuffDelegate(AddressOf th.Run))
Next
lstText.View = View.Details
lstText.Columns.Add("Thread Name")
lstText.Columns.Add("Time")
Catch ex As Exception
MessageBox.Show(ex.Message)
End Try
End Sub
And the page threading is the following
Public Class Threading
Private threadName As String
Dim value As Date
Private Delegate Sub DoStuffDelegate()
Dim lockthis As New Object
Sub New(ByVal ThreadName As String)
Me.threadName = "Thread Number : " & ThreadName
End Sub
Public Sub Run()
For index = 0 To 3
Thread.Sleep(1000)
value = Date.Now
Console.WriteLine(threadName & " Time : " & value)
Dim item3 As New ListViewItem(Me.threadName)
item3.SubItems.Add(Me.value)
Form1.lstText.Items.AddRange(New ListViewItem() {item3})
Next
End Sub
End Class
if I use a thread without the delegate like the following
Dim th As New Threading(index)
Dim trd = New Thread(AddressOf th.Run)
trd.start()
, my output window shows the names and threads as it should for example
Thread Number : 1 Time : 9/15/2014 9:51:00
Thread Number : 0 Time : 9/15/2014 9:51:00
Thread Number : 2 Time : 9/15/2014 9:51:00
Thread Number : 3 Time : 9/15/2014 9:51:00
but doesn't show anything in the list view. but if i choose to use the delegate like the following,
Dim th As New Threading(index)
Me.Invoke(New DoStuffDelegate(AddressOf th.Run))
it shows the following in the output
Thread Number : 1 Time : 9/15/2014 9:50:59
Thread Number : 0 Time : 9/15/2014 9:51:00
Thread Number : 2 Time : 9/15/2014 9:51:01
Thread Number : 3 Time : 9/15/2014 9:51:02
and it shows it in the listview.So it works but doesn't execute the code as a thread does. But finally when I use the following code
Dim th As New Threading(index)
Dim trd = New Thread(AddressOf th.Run)
Me.Invoke(New DoStuffDelegate(AddressOf trd.Start))
, my output window shows the names and threads as it should for example
Thread Number : 1 Time : 9/15/2014 9:51:00
Thread Number : 0 Time : 9/15/2014 9:51:00
Thread Number : 2 Time : 9/15/2014 9:51:00
Thread Number : 3 Time : 9/15/2014 9:51:00
but doesn't show anything in the list view.
I want the list view to show this
Thread Number : 1 Time : 9/15/2014 9:51:00
Thread Number : 0 Time : 9/15/2014 9:51:00
Thread Number : 2 Time : 9/15/2014 9:51:00
Thread Number : 3 Time : 9/15/2014 9:51:00
All threads should have the same time, all threads should start at the same time,and they should appear in my list view.
Please help, I've been working on this for like two weeks and I'm not finding any solution!

Answer 1

What are you adding to the ListView? The name and the time, right? So, when you invoke a method on the UI thread, pas the name AND the time. Don't wait until you're on the UI thread to get the time because obviously that's going to be later.