CODEWITHSUNDEEP
vb.netdelay
ImJP
ImJP

Reputation: 13

Is there any way to create a delay in vb.net?

I want to display an image for 1 second and then disappear it. The code i'm trying to use is:

    PictureBox4.Visible = True
    System.Threading.Thread.Sleep(1000) ' 1 second delay
    PictureBox4.Visible = False

But so far it's not working, is there a way to make this code works or any other methods to implement a delay in vb.net?

Upvotes: 0

Views: 1505

Answers (2)

Mouayed Bouameur
Mouayed Bouameur

Reputation: 26

Try this

    PictureBox4.Visible = True
    Application.DoEvents()
    System.Threading.Thread.Sleep(1000)
    PictureBox4.Visible = False

Upvotes: 0

David
David

Reputation: 6131

The reason why your code isn't working is because Sleep is tying up the UI thread and the control is never redrawn. So technically the Visible property is being changed, it is just that the user never sees the change.

You have a couple of options. One is to use a System.Timers.Timer (documentation) and set the AutoReset to false and the Interval to 1,000. Before you start the timer you would show the control and then in the Timer's Elapsed event you would hide the control. Here is a quick example:

Private ReadOnly _timer As Timers.Timer

Sub New()
    ' This call is required by the designer.
    InitializeComponent()

    ' Add any initialization after the InitializeComponent() call.
    _timer = New Timers.Timer() With {
        .AutoReset = False,
        .Interval = 1000,
        .SynchronizingObject = Me
    }
End Sub

Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
    ' create an event handler for the Elapsed event
    AddHandler _timer.Elapsed, Sub() PictureBox4.Hide()

    ' show the control then start the timer
    PictureBox4.Show()
    _timer.Start()
End Sub

Update

Per JMcIlhinney's suggestion, I'm setting the SynchronizingObject property so that you don't have to call the Invoke method when hiding the control.

Upvotes: 1

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