MyBasciAudioPlayer

///
/// Written by Istace Emmanuel
///
/// More info : http://istacee.wordpress.com/
/// Topic : http://istacee.wordpress.com/2011/05/22/dotnet-mci-wrapper-basic-audio-player-c/
///

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;

namespace AudioPlayer
{
    public class MyBasicAudioPlayer
    {
        /// <summary>
        ///  Provide you a basic audio player based on MMI
        /// </summary>
        [DllImport("winmm.dll")]
        private static extern long mciSendString(string strCommand, StringBuilder strReturn, int iReturnLength, IntPtr hwndCallback);

        private string _command;

        /// <summary>
        /// Return true if a file is open, false if not
        /// </summary>
        public bool isOpen { get; internal set; }

        /// <summary>
        /// Return true if a file is paused, false if not
        /// </summary>
        public bool isPause { get; internal set; }

        /// <summary>
        /// Default constructor
        /// </summary>
        public MyBasicAudioPlayer()
        {
            isOpen = false;
            isPause = false;
        }

        /// <summary>
        /// Close the audio file
        /// </summary>
        public void Close()
        {
            if (isOpen)
            {
                _command = "close MediaFile";
                mciSendString(_command, null, 0, IntPtr.Zero);
                isOpen = false;
            }
        }

        /// <summary>
        /// Open the audio file passed on argument
        /// </summary>
        /// <param name="fileName">Path of the file from the root</param>
        public void Open(string fileName)
        {
            if (!isOpen)
            {
                _command = "open \"" + fileName + "\" type mpegvideo alias MediaFile";
                mciSendString(_command, null, 0, IntPtr.Zero);
                isOpen = true;
                isPause = false;
            }
        }

        /// <summary>
        /// Play the audio file who's loaded whith Open(string filename)
        /// </summary>
        /// <param name="loop">If true, the audio will be play again and again.</param>
        public void Play(bool loop)
        {
            if (isOpen && !isPause)
            {
                _command = "play MediaFile";
                if (loop)
                    _command += " REPEAT";
                mciSendString(_command, null, 0, IntPtr.Zero);
            }
        }

        /// <summary>
        /// Pause the current audio file
        /// </summary>
        public void Pause()
        {
            if (isOpen && !isPause)
            {
                _command = "pause MediaFile";
                mciSendString(_command, null, 0, IntPtr.Zero);
                isPause = true;
            }
        }

        /// <summary>
        /// Resume after a pause the current audio file
        /// </summary>
        public void Resume()
        {
            if (isOpen && isPause)
            {
                _command = "resume MediaFile";
                mciSendString(_command, null, 0, IntPtr.Zero);
                isPause = false;
            }
        }

        /// <summary>
        /// Stop the current audio file
        /// </summary>
        public void Stop()
        {
            if (isOpen)
            {
                _command = "stop MediaFile";
                mciSendString(_command, null, 0, IntPtr.Zero);
                isPause = false;
            }
        }

        /// <summary>
        /// Set the volume of the current audio file
        /// </summary>
        /// <param name="volume">Volume to set between 0 & 1000</param>
        public void SetVolume(int volume)
        {
            _command = "setaudio MediaFile volume to " + volume.ToString();
            mciSendString(_command, null, 0, IntPtr.Zero);
        }
    }
}