BlockThread.xaml : Thread « Windows Presentation Foundation « VB.Net Tutorial






<Window x:Class="WPFThreading.BlockThread"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="UI Thread Blocker" Height="275" Width="225"
  >
  <Window.Resources>
    <Style TargetType="{x:Type Button}">
      <Setter Property="Height" Value="20" />
      <Setter Property="Background" Value="Beige"/>
      <Setter Property="Margin" Value="2" />
    </Style>
    <Style TargetType="{x:Type Label}">
      <Setter Property="FontWeight" Value="Bold" />
      <Setter Property="Margin" Value="2" />
    </Style>
    <Style TargetType="{x:Type TextBox}">
      <Setter Property="Margin" Value="2" />
    </Style>
  </Window.Resources>
  <Border Width="200" Height="225" BorderBrush="Black" 
    BorderThickness="1" Margin="4">
    <StackPanel>

      <Label>Simulate Long-Running Process</Label>
      <Button Name="button1" Click="button1_click">Go to sleep</Button>

      <Label>Will I respond?</Label>
      <Button Name="button2" Click="button2_click">Try Me</Button>

      <Label>Output Messages</Label>
      <TextBox Name="textbox1"/>

      <Label/>

      <StackPanel Orientation="Horizontal">
        <Label>UI thread:</Label>
        <Label Name="UIThreadLabel"></Label>
      </StackPanel>

      <StackPanel Orientation="Horizontal">
        <Label>BG thread:</Label>
        <Label Name="BackgroundThreadLabel"></Label>
      </StackPanel>

    </StackPanel>
  </Border>
</Window>

//File:Window.xaml.vb

Imports System.Windows

Namespace WPFThreading

  Public Partial Class BlockThread
    Inherits System.Windows.Window

    Public Sub New()
      InitializeComponent()

      Me.UIThreadLabel.Content = Me.Dispatcher.Thread.ManagedThreadId
      Me.BackgroundThreadLabel.Content = "N/A"
    End Sub
    Private Sub button1_click(sender As Object, e As RoutedEventArgs)
      System.Threading.Thread.Sleep(5000)
      Me.textbox1.Text = "Done Sleeping..."
    End Sub

    Private Sub button2_click(sender As Object, e As RoutedEventArgs)
      Me.textbox1.Text = "Hello WPF"
    End Sub

  End Class
End Namespace
WPF Block Threadxaml








16.115.Thread
16.115.1.Create a multi threaded web browsing application.Create a multi threaded web browsing application.
16.115.2.Show a Continuous Animation During an Asynchronous ProcessShow a Continuous Animation During an Asynchronous Process
16.115.3.Load the Data for a Window Asynchronously After It Has RenderedLoad the Data for a Window Asynchronously After It Has Rendered
16.115.4.Check Whether You Are Running on the UI ThreadCheck Whether You Are Running on the UI Thread
16.115.5.Ensure That You Are Running on the UI ThreadEnsure That You Are Running on the UI Thread
16.115.6.A Cancellable ProgressBar While Processing on a Background ThreadA Cancellable ProgressBar While Processing on a Background Thread
16.115.7.Show a Continuous Progress Bar While Processing on a Background ThreadShow a Continuous Progress Bar While Processing on a Background Thread
16.115.8.Execute a Method Asynchronously Using the Dispatcher QueueExecute a Method Asynchronously Using the Dispatcher Queue
16.115.9.Thread Sleep in Button Click handlerThread Sleep in Button Click handler
16.115.10.Execute a Method Asynchronously Using a Background Worker ThreadExecute a Method Asynchronously Using a Background Worker Thread
16.115.11.Track the Progress of a Background Worker ThreadTrack the Progress of a Background Worker Thread
16.115.12.Support the Cancellation of a Background Worker ThreadSupport the Cancellation of a Background Worker Thread
16.115.13.Create a Background Worker Thread in XAMLCreate a Background Worker Thread in XAML
16.115.14.WPF ThreadingWPF Threading
16.115.15.BlockThread.xamlBlockThread.xaml
16.115.16.Keep the UI from becoming non-responsive in single threaded application which performs a long operation.Keep the UI from becoming non-responsive in single threaded application which performs a long operation.