Pause and Resume WPF Slideshow

Posted on 2009-05-12
Last Modified: 2013-12-17
hi , I am attaching a code , to play a slideshow of pictures from your "MyPictures" folder of your PC

Create a new project of the type "WPF Application" and replace window1.xaml and window1.xaml.cs code with my code below

I would like to implement a funtionality to Pause and Resume WPF Slideshow
When the slide show is paused, a text on the top right corner should be displayed as "Paused"

Make Sure you have pictures in "MyPictures" folder of your PC
Please help me implement these events...
//In window.xaml

<Window x:Class="MySlideShow.Window1"




    Title="My SlideShow" Height="480" Width="640" WindowStartupLocation="CenterScreen" WindowState="Maximized" Background="#FF000000">

    <Grid x:Name="LayoutRoot">


            <ColumnDefinition Width="*"/>


        <Rectangle x:Name="rec1" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>

        <Rectangle x:Name="rec2" HorizontalAlignment="Stretch" VerticalAlignment="Stretch"/>



// window1.xaml.cs code

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Media.Animation;

using System.Windows.Navigation;

using System.Windows.Shapes;

using System.Windows.Threading;

namespace MySlideShow


    /// <summary>

    /// Interaction logic for Window1.xaml

    /// </summary>

    public partial class Window1 : Window


        string path;

        string[] files;

        List<string> showPictures = new List<string>();

        int count = 0;

        DispatcherTimer dt = new DispatcherTimer();

        int currentRect = 1;

        double fade = 0.5;

        public Window1()




            //Get The Picture files from the My Pictures Directory

            files = System.IO.Directory.GetFiles(Environment.GetFolderPath(Environment.SpecialFolder.MyPictures));

            for (int i = 0; i < files.Length; i++)


                if (files[i].ToUpper().EndsWith(".JPG") ||

                    files[i].ToUpper().EndsWith(".PNG") ||

                    files[i].ToUpper().EndsWith(".GIF") ||






            dt_Tick(this, new EventArgs());

            dt.Interval = TimeSpan.FromSeconds(2);

            dt.Tick += new EventHandler(dt_Tick);


        void dt_Tick(object sender, EventArgs e)


            if (showPictures.Count < 1)


                MessageBox.Show("No Images Available");






                Image img = new Image();

                img.Source = new BitmapImage(new Uri(showPictures[count]));

                if (currentRect == 1)


                    rec1.Opacity = 0;

                    VisualBrush vb = new VisualBrush(img);

                    vb.Stretch = Stretch.UniformToFill;

                    rec1.Fill = vb;

                    rec1.BeginAnimation(FrameworkElement.OpacityProperty, new DoubleAnimation(1, TimeSpan.FromSeconds(fade)));

                    rec2.BeginAnimation(FrameworkElement.OpacityProperty, new DoubleAnimation(0, TimeSpan.FromSeconds(fade)));





                    rec2.Opacity = 0;

                    VisualBrush vb = new VisualBrush(img);

                    vb.Stretch = Stretch.UniformToFill;

                    rec2.Fill = vb;

                    rec2.BeginAnimation(FrameworkElement.OpacityProperty, new DoubleAnimation(1, TimeSpan.FromSeconds(fade)));

                    rec1.BeginAnimation(FrameworkElement.OpacityProperty, new DoubleAnimation(0, TimeSpan.FromSeconds(fade)));



                if (currentRect == 1)


                    currentRect = 2;


                else { currentRect = 1; }


            if (count == showPictures.Count - 1)


                count = 0;









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Question by:ctrlctrl
  • 2

Accepted Solution

rendaduiyan earned 500 total points
Comment Utility
your implementation is based on a  timer. if you want to pause, you have to stop the timer.
So you have to write a event handler for KeyPressed or mouse button, in which you can stop the timer.
something like this.

public bool PreFilterMessage(ref Message m)


            if (m.Msg == WM_KEYDOWN)


                return HandleKeys((Keys)((int)m.WParam) & Keys.KeyCode);


            return false;


public bool HandleKeys(Keys keycode)


            bool ret = true;

            switch (keycode)


                case Keys.P:dt.stop; break;

                case Keys.S:dt.start;break;


            return ret;


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Author Comment

Comment Utility
Hi rendaduiyan,

Thank You for the solution,

But will the slideshow resume at the same picture where it paused? with this implementation

Author Comment

Comment Utility
excellent .. It worked

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