Windows Media Player

The Windows Media Player control enables an application to play video and sound in many multimedia formats. These include MPEG (Motion Pictures Experts Group) audio and video, AVI (audio-video interleave) video, WAV (Windows wave-file format) audio and MIDI (Musical Instrument Digital Interface) audio. Users can find pre-existing audio and video on the Internet, or they can create their own files, using available sound and graphics packages.

The application in Fig. 17.27 demonstrates the Windows Media Player control. To use this control, you must add the control to the Toolbox. First select Tools > Choose Toolbox Items... to display the Choose Toolbox Items dialog. Click the COM components tab, then scroll down and select the option Windows Media Player. Click the OK button to dismiss the dialog. The Windows Media Player control now appears at the bottom of the Toolbox.

Figure 17.27. Windows Media Player demonstration.

 1 // Fig. 17.27: MediaPlayerTest.cs
 2 // Windows Media Player control used to play media files.
 3 using System;
 4 using System.Windows.Forms;
 6 public partial class MediaPlayer : Form
 7 {
 8 // default constructor
 9 public MediaPlayer()
10 {
11 InitializeComponent();
12 } // end constructor
14 // open new media file in Windows Media Player
15 private void openItem_Click( object sender, EventArgs e )
16 {
17 openMediaFileDialog.ShowDialog();
19 // load and play the media clip
20 player.URL = openMediaFileDialog.FileName;
21 } // end method openItem_Click
23 // exit program when exit menu item is clicked
24 private void exitItem_Click( object sender, EventArgs e )
25 {
26 Application.Exit();
27 } // end method exitItem_Click
28 } // end class MediaPlayer

The Windows Media Player control provides several buttons that allow the user to play the current file, pause, stop, play the previous file, rewind, forward and play the next file. The control also includes a volume control and trackbars to select a specific position in the media file.

Our application provides a File menu containing the Open and Exit menu items. When a user chooses Open from the File menu, event handler openItem_Click (lines 1521) executes. An OpenFileDialog box displays (line 17) to allow the user to select a file. The program then sets the URL property of the player (the Windows Media Player control object of type AxMediaPlayer) to the name of the file chosen by the user. The URL property specifies the file that Windows Media Player is currently using.

The exitItem_Click event handler (lines 2427) executes when the user selects Exit from the File menu. This event handler simply calls Application.Exit to terminate the application. We provide sample audio and video files in the directory that contains this example.



    Introduction to Computers, the Internet and Visual C#

    Introduction to the Visual C# 2005 Express Edition IDE

    Introduction to C# Applications

    Introduction to Classes and Objects

    Control Statements: Part 1

    Control Statements: Part 2

    Methods: A Deeper Look


    Classes and Objects: A Deeper Look

    Object-Oriented Programming: Inheritance

    Polymorphism, Interfaces & Operator Overloading

    Exception Handling

    Graphical User Interface Concepts: Part 1

    Graphical User Interface Concepts: Part 2


    Strings, Characters and Regular Expressions

    Graphics and Multimedia

    Files and Streams

    Extensible Markup Language (XML)

    Database, SQL and ADO.NET

    ASP.NET 2.0, Web Forms and Web Controls

    Web Services

    Networking: Streams-Based Sockets and Datagrams

    Searching and Sorting

    Data Structures



    Appendix A. Operator Precedence Chart

    Appendix B. Number Systems

    Appendix C. Using the Visual Studio 2005 Debugger

    Appendix D. ASCII Character Set

    Appendix E. Unicode®

    Appendix F. Introduction to XHTML: Part 1

    Appendix G. Introduction to XHTML: Part 2

    Appendix H. HTML/XHTML Special Characters

    Appendix I. HTML/XHTML Colors

    Appendix J. ATM Case Study Code

    Appendix K. UML 2: Additional Diagram Types

    Appendix L. Simple Types


    Visual C# How to Program
    Visual C# 2005 How to Program (2nd Edition)
    ISBN: 0131525239
    EAN: 2147483647
    Year: 2004
    Pages: 600 © 2008-2020.
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