Implement Application.DoEvents in WPF : Application « Windows Presentation Foundation « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Windows Presentation Foundation
3. Application

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="WPF" Height="200" Width="300">
    <StackPanel>
        <Button x:Name="btnWithout" Click="btnWithout_Click">Without DoEvents</Button>
        <Button x:Name="btnWith" Click="btnWith_Click">With DoEvents</Button>
        <ListBox x:Name="listBox"/>

    </StackPanel>
</Window>

//File:Window.xaml.cs

using System.Windows;
using System.Windows.Threading;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        private delegate void EmptyDelegate();
        public Window1()
        {
            InitializeComponent();
        }

        private void btnWithout_Click(object sender, RoutedEventArgs e)
        {
            LoadNumbers(false);
        }

        private void btnWith_Click(object sender, RoutedEventArgs e)
        {
            LoadNumbers(true);
        }

        private void LoadNumbers(bool callDoEvents)
        {
            listBox.Items.Clear();

            btnWithout.IsEnabled = false;
            btnWith.IsEnabled = false;

            for(int i = 1; i <= 10000; i++)
            {
                listBox.Items.Add("Number " + i.ToString());
                if(callDoEvents){
                    DoEvents();
                }
                
            }
            btnWithout.IsEnabled = true;
            btnWith.IsEnabled = true;
        }
        public static void DoEvents()
        {
            Dispatcher.CurrentDispatcher.Invoke(DispatcherPriority.Background,new EmptyDelegate(delegate{}));
        }


    }
}

24.127.Application
	24.127.1.	Use Application.Current.Dispatcher.Invoke to throw an exception
	24.127.2.	(ResourceDictionary)Application.LoadComponent
	24.127.3.	Application.GetResourceStream
	24.127.4.	Application Exit event
	24.127.5.	Handle Application DispatcherUnhandledException
	24.127.6.	Application Startup event
	24.127.7.	Store the variable in the application and get it back
	24.127.8.	Application.Current.Windows stores all windows you created
	24.127.9.	Application.Current.ShutdownMode
	24.127.10.	Implement Application.DoEvents in WPF
	24.127.11.	Throw Application event from button click event handler
	24.127.12.	Shut down the application in Window closing event
	24.127.13.	Menu with Application command: cut, copy, paste
	24.127.14.	Use Application Command to edit RichTextBox
	24.127.15.	Exit current action with Application.Current.Shutdown
	24.127.16.	Set and get data from Application.Current.Properties
	24.127.17.	Localizable Application by putting localized resource in Xaml
	24.127.18.	Application NavigationFailed event
	24.127.19.	Application Events Sample
	24.127.20.	Single Instance Sample
	24.127.21.	StartupUri attribute
	24.127.22.	Using GetContentStream
	24.127.23.	Create and retrieve cookies from a Windows Presentation Foundation (WPF) application using SetCookie and GetCookie.
	24.127.24.	Get a handle to the current app and shut it down
	24.127.25.	extends Application
	24.127.26.	Commandline to compile WPF application
	24.127.27.	Add application exit event handler
	24.127.28.	Code Only WPF Application Sample
	24.127.29.	A Simple WPF Application, written XMAL-Free.
	24.127.30.	Inherit Application class and override OnStartup
	24.127.31.	Inherit Application class and listen to session ending event
	24.127.32.	Set SessionEndingCancelEventArgs.Cancel to true to cancel session ending event