Asking tutorial for VB.NET Thread

I have a class named TestClass

Public Class TestClass

    Private _Count As Integer


    Public ReadOnly Property Count() As Integer
        Get
            For i As Integer = 0 To 999999999
                Threading.Thread.Sleep(100)
            Next

            Return 100
        End Get
    End Property

End Class

Form the main form, I call the class. Here is my code:

Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
    Dim tg As New TestClass
    MsgBox(tg.Count)

End Sub

When I call tg.Count from main form, the main form will become not responding. How to p开发者_运维百科revent my form from not responding. The user can access other menu rather than waiting for the result. Can anyone help me?

Use BackgroundWorker to run it in a worker thread. That will keep your GUI responding. http://www.dreamincode.net/forums/topic/88605-the-background-worker/

Drag the BackgroundWorker componenet from the toolbox onto the form. Now, put your counter loop within the BackgroundWorker_DoWork event handler, which is autogenerated for you. All you need to do now is to call RunWorkerAsync on it.

Hope it helps!

Your loop is looping from 0 to 999999999 and delaying 100ms every loop which is halting that current thread. A better solution would be to use a timer, check for your completed condition and restart the timer if necessary. This way, your main form thread will always be responsive.