C# 播放 MP3 的資料

在網上找了一些相關的資料,不過暫時還沒時間研究,先存放起來以後有空再研究一下

using System;
using System.Text;
using System.Runtime.InteropServices;

namespace Music
{
    /**//// <summary>
    /// 
    /// </summary>
    public class Audio
    {
        [DllImport("winmm.dll")]
        private static extern int mciSendString 
            (
                string lpstrCommand,
                string lpstrReturnString,
                int uReturnLength,
                int hwndCallback
            );

        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern int GetShortPathName
            (
                [MarshalAs(UnmanagedType.LPTStr)]    string path,
　                [MarshalAs(UnmanagedType.LPTStr)]    StringBuilder shortPath,
　                int shortPathLength
            ); 

        public Audio()
        {    

        }

        public void Play(string FileName)
        {
            StringBuilder shortPathTemp = new StringBuilder(255);
            int result = GetShortPathName(FileName, shortPathTemp, shortPathTemp.Capacity);
            string ShortPath = shortPathTemp.ToString();

            mciSendString("open "+ShortPath+" alias song","",0,0);
            mciSendString("play song","",0,0);
        }

        public void Stop()
        {
            mciSendString("stop song","",0,0);
        }

        public void Pause()
        {
            mciSendString("pause song","",0,0);
        }

        public void Close()
        {
            mciSendString("close song","",0,0);
        }
    }
}

/*
 * // /////希冀媒體播放器類// //////
 * ///  版本: 1.0
 * ///  此版本為第一個版本，若
 * ///  使用中發現問題，請下載
 * ///  最新版本，地址：希冀博客
 * ///  http://ceeji.blog.hexun.com
 * ///  版權所有，希冀
 * ///  尊重版權，請保留版權信息
 */

using System;
using System.Runtime.InteropServices;
using System.Text;
using System.IO;

namespace CeeMediaPlayer
{
    /// <summary>
    /// 封裝了 WinMM 中的 MciSendString 相關操作。
    /// </summary>
    public class CeeMediaPlayer
    {
        //該類包括靜態和動態兩種模式。
        /// <summary>
        /// 創建 CeeMediaPlayer 的新實例。
        /// </summary>
        public CeeMediaPlayer()
        {
        }

        //定義API函數使用的字符串變量
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
        private string Name = "";

        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 128)]
        private string durLength = "";

        [MarshalAs(UnmanagedType.LPTStr, SizeConst = 128)]
        private string TemStr = "";

        int ilong;

        //定義播放狀態枚舉變量
        public enum PlayState
        {
            mPlaying = 1,
            mPuase = 2,
            mStop = 3
        };

 

        //結構變量
        public struct structMCI
        {
            public bool bMut;
            public int iDur;
            public int iPos;
            public int iVol;
            public int iBal;
            public string iName;
            public PlayState state;
        };

        public structMCI mc = new structMCI();

        //取得播放文件屬性
        public string FileName
        {
            get
			{
				return mc.iName;
			}
		
			set
            {
				//ASCIIEncoding asc = new ASCIIEncoding();
				try
				{
					TemStr = "";
					TemStr = TemStr.PadLeft(127, ' ');
					Name = Name.PadLeft(260, ' ');
					mc.iName = value;
					ilong = APIClass.GetShortPathName(mc.iName, Name, Name.Length);
					Name = GetCurrPath(Name);

                    //Name = "open " + Convert.ToChar(34) + Name + Convert.ToChar(34) + " alias media";

                    Name = "open " + Convert.ToChar(34) + Name + Convert.ToChar(34) + " alias media";
					ilong = APIClass.mciSendString("close media", TemStr, TemStr.Length, 0);
					ilong = APIClass.mciSendString(Name, TemStr, TemStr.Length, 0);
                    ilong = APIClass.mciSendString("set media time format milliseconds", TemStr, TemStr.Length, 0);
                    mc.state = PlayState.mStop;
                }
				catch
                {
                    throw new FileNotFoundException(value);
                }
            }
        }

 

        //播放
        /// <summary>
        /// 播放 this.FileName.
        /// </summary>
        public void Play()
        {
            TemStr = "";
			TemStr = TemStr.PadLeft(127, Convert.ToChar(" "));
			APIClass.mciSendString("play media", TemStr, TemStr.Length, 0);
			mc.state = PlayState.mPlaying;
        }

 

        //停止      
        /// <summary>
        /// 停止播放當前文件。
        /// </summary>
        public void Stop()
        {
            TemStr = "";
            TemStr = TemStr.PadLeft(128, Convert.ToChar(" "));
            ilong = APIClass.mciSendString("stop media", TemStr, 128, 0);
            //ilong = APIClass.mciSendString("close all", TemStr, 128, 0);
            mc.state = PlayState.mStop;
        }

        /// <summary>
        /// 暫停播放當前文件。
        /// </summary>
        public void Puase()
        {
            TemStr = "";
            TemStr = TemStr.PadLeft(128, ' ');
            ilong = APIClass.mciSendString("pause media", TemStr, TemStr.Length, 0);
            mc.state = PlayState.mPuase;
		}

        private string GetCurrPath(string name)
        {
			if (name.Length < 1) return "";
			name = name.Trim();
			name = name.Substring(0, name.Length - 1);
			return name;
        }

        //總時間
        /// <summary>
        /// 獲得當前文件總播放時間，單位為毫秒。
        /// </summary>
        public int Duration
        {
			get
            {
				if (mc.state == PlayState.mStop)
				{
				}
				durLength = "";
                durLength = durLength.PadLeft(128, Convert.ToChar(" "));
                APIClass.mciSendString("status media length", durLength, durLength.Length, 0);
                durLength = durLength.Trim();

                if (durLength == "") return 0;
                return (int)(Convert.ToDouble(durLength) / 1000f);
            }
        }

        /// <summary>
        /// 獲取當前所在的播放位置。
        /// </summary>

        public int CurrentPosition
        {
            get
            {
                durLength = "";
                durLength = durLength.PadLeft(128, Convert.ToChar(" "));
				APIClass.mciSendString("status media position", durLength, durLength.Length, 0);
                mc.iPos = (int)(Convert.ToDouble(durLength) / 1000f);
                return mc.iPos;
            }
        }

    }

    /// <summary>
    /// 提供用戶和 WinMM 對象的直接交互。
    /// </summary>

    public class APIClass
    {

        /// <summary>
        /// 獲取指定文件的短名稱。
        /// </summary>
        /// <param name="lpszLongPath">長名稱</param>
        /// <param name="shortFile">返回的短名稱</param>
        /// <param name="cchBuffer">緩衝區</param>
        /// <returns></returns>

        [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
        public static extern int GetShortPathName(
			string lpszLongPath,
			string shortFile,
			int cchBuffer
        );

        [DllImport("winmm.dll", EntryPoint = "mciSendString", CharSet = CharSet.Auto)]
        public static extern int mciSendString(
			string lpstrCommand,
			string lpstrReturnString,
			int uReturnLength,
			int hwndCallback
        );
    }
}

調整音量 :

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
 
namespace waveOutSetVolume
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
 
        [DllImport("winmm.dll")]   //引用winmm.dll    
 
        public static extern long waveOutSetVolume(uint deviceID, uint Volume);      //參數為uint               
        private void Form1_Load(object sender, EventArgs e)
        {
 
        }
 
        // trackBar 控件的最大值為0xffff,最小值為0x0000
        private void trackBar1_Scroll(object sender, EventArgs e)
        {
            waveOutSetVolume(0, Convert.ToUInt16(trackBar1.Value));        
        }
    }
}