Winforms ProgressBar Takes time to Render

Question

I have noticied that when using the PorgressBar. If I set the value to x, the value displayed is not immediately updated, it takes a small amount of time to draw it as the b

Answer 1

This is my code based on Matt Wilko's suggestion:

Imports System.Net
Imports System.IO
Imports System.Text.RegularExpressions
Public Class Form1
Dim client As New WebClient
Public Sub New()

    ' This call is required by the Windows Form Designer.
    InitializeComponent()

    ' Add any initialization after the InitializeComponent() call.
    AddHandler client.DownloadStringCompleted, AddressOf client_DownloadStringCompleted
    AddHandler client.DownloadProgressChanged, AddressOf client_DownloadProgressChanged

End Sub
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
    ProgressBar1.Value = 0
    ProgressBar1.Visible = True
    client.DownloadStringAsync(New Uri("http://somewebsite.com"), Nothing)
End Sub
Private Sub client_DownloadProgressChanged(ByVal sender As Object, ByVal e As System.Net.DownloadProgressChangedEventArgs)
    If ProgressBar1.Value < e.ProgressPercentage Then
        ProgressBar1.Value = e.ProgressPercentage
    End If
End Sub
Private Sub client_DownloadStringCompleted(ByVal sender As Object, ByVal e As System.Net.DownloadStringCompletedEventArgs)
    ProgressBar1.Value = 100
    Timer1.Enabled = True
End Sub

Private Sub Timer1_Tick(sender As System.Object, e As System.EventArgs) Handles Timer1.Tick
    Static waitToCloseProgressBar As Integer
    If ProgressBar1.Value = 100 Then
        If waitToCloseProgressBar > 6 Then
            Timer1.Enabled = False
            waitToCloseProgressBar = 0
            ProgressBar1.Visible = False
        Else
            waitToCloseProgressBar = waitToCloseProgressBar + 1
        End If
    End If
End Sub
End Class