ARTICLE

Play Video in WPF

Posted by Mahesh Chand Articles | WPF April 09, 2007
If you have built any video enabled application prior to WPF, you must be familiar with the Windows Media Player ActiveX control. The WPF library provides the MediaElement control that encapsulates Windows Media Player functionality.
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If you have built any video-enabled application prior to WPF, you must be familiar with the Windows Media Player ActiveX control. The WPF library provides the MediaElement control that encapsulates the Windows Media Player functionality.

 

The MediaElement tag in XAML allows you to play videos in XAML and WPF. The Source attribute of the tag takes the full path of the video. The following code snippet uses the MediaElement to display a video.

 

 

<MediaElementName="VideoControl"Width="200"Height ="400"

                  Source="C:\Windows\System32\oobe\images\intro.wmv" >    

</MediaElement>


The file can also be an MPEG. The following code snippet plays a MPEG video.  

 

<MediaElementName="VideoControl"Width="200"Height ="400"

                  Source="C:\TestV.MPG" >    

</MediaElement


The Width and Height attributes sets the width and height of the control respectively.

 

Setting MediaElement Properties Dynamically

 

You can also access the control programmatically and set its properties in your code. The following code snippet sets the MediaControls properties at run-time.

 

 VideoControl.Volume = 100;

 VideoControl.Width = 440;

 VideoControl.Height = 280;

 

The Application

 

Now let's build our video application. I want to create an application that looks like Figure 1. As you can see from this figure, the Browse button allows me to browse a video file and Play, Pause, and Stop buttons plays, pauses, and stops the video.

 

MediaElementImg1.gif

 

Figure 1. Video enabled WPF application

 

The code listed in Listing 1 creates the user interface screen.

 

 

<TextBoxHeight="20"Margin="10,7,134,0"Name="MediaPathTextBox"VerticalAlignment="Top"  ></TextBox>

    <ButtonHeight="20"HorizontalAlignment="Right"Margin="0,6,14,0"Name="BrowseButton"

            VerticalAlignment="Top"Width="94"Click="BrowseClick">

        Browse Media

    </Button>

    <MediaElementCanvas.Left="20"Canvas.Top ="40"

            Name="VideoControl"LoadedBehavior="Manual"UnloadedBehavior="Stop" >

      </MediaElement>

   

    <ButtonHeight="23"HorizontalAlignment="Left"Margin="15,0,0,13"

            Name="PlayButton"VerticalAlignment="Bottom"Width="75"

            Click="PlayClick">

      Play</Button>

    <ButtonHeight="23"HorizontalAlignment="Left"Margin="103,0,0,13"

            Name="PauseButton"VerticalAlignment="Bottom"Width="75"

            Click="PauseClick">

      Pause</Button>

    <ButtonHeight="23"Margin="191,0,186,13"Name="StopButton"

            VerticalAlignment="Bottom" Click="StopClick">

      Stop</Button>

  </Grid> 


Listing 1.

 

The code behind looks like Listing 2. As you can see from this code, on the Windows1 constructor I set the Volume, Width, and Height of the control.

 

The Browse button click event handler calls OpenFileDialog, that lets us browse the files and sets the "MediaPathTextBox.Text" as the media file name.

 

The Play, Pause, and Stop button click handlers simply calls Play, Pause, and Stop methods of the MediaElement control.

 

<TextBoxHeight="20"Margin="10,7,134,0"Name="MediaPathTextBox"VerticalAlignment="Top"  ></TextBox>

    <ButtonHeight="20"HorizontalAlignment="Right"Margin="0,6,14,0"Name="BrowseButton"

            VerticalAlignment="Top"Width="94"Click="BrowseClick">

        Browse Media

    </Button>

    <MediaElementCanvas.Left="20"Canvas.Top ="40"

            Name="VideoControl"LoadedBehavior="Manual"UnloadedBehavior="Stop" >

      </MediaElement>

   

    <ButtonHeight="23"HorizontalAlignment="Left"Margin="15,0,0,13"

            Name="PlayButton"VerticalAlignment="Bottom"Width="75"

            Click="PlayClick">

      Play</Button>

    <ButtonHeight="23"HorizontalAlignment="Left"Margin="103,0,0,13"

            Name="PauseButton"VerticalAlignment="Bottom"Width="75"

            Click="PauseClick">

      Pause</Button>

    <ButtonHeight="23"Margin="191,0,186,13"Name="StopButton"

            VerticalAlignment="Bottom" Click="StopClick">

      Stop</Button>

  </Grid>

 

public Window1()

        {

            InitializeComponent();

            VideoControl.Volume = 100;

            VideoControl.Width = 440;

            VideoControl.Height = 280;

         }

 

       void BrowseClick(Object sender, EventArgs e)

        {

           OpenFileDialog openDlg =new OpenFileDialog();

            openDlg.InitialDirectory = @"c:\";

            openDlg.ShowDialog();

            MediaPathTextBox.Text = openDlg.FileName;

        }

 

       void PlayClick(object sender, EventArgs e)

        {

           if (MediaPathTextBox.Text.Length <= 0)

            {

                System.Windows.Forms.MessageBox.Show("Enter a valid media file");

               return;

            }

            VideoControl.Source = newUri(MediaPathTextBox.Text);

            VideoControl.Play();

        }

       void PauseClick(object sender, EventArgs e)

        {

            VideoControl.Pause();

        }

       void StopClick(object sender, EventArgs e)

        {

            VideoControl.Stop();

        }


Listing 2.

 

Download the attached source code for more details.

Article Extensions
Contents added by Parham Zare on Jul 21, 2012
Thanks
Contents added by kiran vls on Jun 26, 2011
Contents added by Mahesh Chand on Jul 05, 2009
Complex Sample Application

Here is a complete sample project come with .NET Framework samples. I have updated the project so it runs in Visual Studio 2008 including the complete solution.

The UI of the application looks like this.

VideoUI.gif

To run your videos, you need to change the Media folder and videos in this folder.

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