本文實例講述了C#實現獲取mp3 Tag信息的方法。分享給大家供大家參考，具體如下：
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using System;using System.Collections.Generic;using System.Text;using System.IO;namespace Foxer_Player_1._1{ public struct Mp3Info { public string identify; //TAG，三個字節 public string Title; //歌曲名,30個字節 public string Artist; //歌手名,30個字節 public string Album; //所屬唱片,30個字節 public string Year; //年,4個字符 public string Comment; //注釋,28個字節 public char reserved1; //保留位，一個字節 public char reserved2; //保留位，一個字節 public char reserved3; //保留位，一個字節 } /// <summary> /// Mp3文件信息類 /// </summary> public class Mp3FileInfo { Mp3Info info; /// <summary> /// 構造函數,輸入文件名即得到信息 /// </summary> /// <param name="mp3FilePos"></param> public Mp3FileInfo(String mp3FilePos) { info = getMp3Info(getLast128(mp3FilePos)); } /// <summary> /// 獲取整理后的Mp3文件名,這里以標題和藝術家名定文件名 /// </summary> /// <returns></returns> public String GetOriginalName() { return formatString(info.Title.Trim()) + "-" + formatString(info.Artist.Trim()); } /// <summary> /// 去除\0字符 /// </summary> /// <param name="str"></param> /// <returns></returns> private static String formatString(String str) { return str.Replace("\0", ""); } /// <summary> /// 獲取MP3文件最后128個字節 /// </summary> /// <param name="FileName">文件名</param> /// <returns>返回字節數組</returns> public static byte[] getLast128(string FileName) { FileStream fs = new FileStream(FileName, FileMode.Open, Fileaccess.Read); Stream stream = fs; stream.Seek(-128, SeekOrigin.End); const int seekPos = 128; int rl = 0; byte[] Info = new byte[seekPos]; rl = stream.Read(Info, 0, seekPos); fs.Close(); stream.Close(); return Info; } /// <summary> /// 獲取MP3歌曲的相關信息 /// </summary> /// <param name = "Info">從MP3文件中截取的二進制信息</param> /// <returns>返回一個Mp3Info結構</returns> public static Mp3Info getMp3Info(byte[] Info) { Mp3Info mp3Info = new Mp3Info(); string str = null; int i; int position = 0;//循環的起始值 int currentIndex = 0;//Info的當前索引值 //獲取TAG標識 for (i = currentIndex; i < currentIndex + 3; i++) { str = str + (char)Info[i]; position++; } currentIndex = position; mp3Info.identify = str; //獲取歌名 str = null; byte[] bytTitle = new byte[30];//將歌名部分讀到一個單獨的數組中 int j = 0; for (i = currentIndex; i < currentIndex + 30; i++) { bytTitle[j] = Info[i]; position++; j++; } currentIndex = position; mp3Info.Title = Foxer_Player_1._1.Mp3FileInfo.byteToString(bytTitle); //獲取歌手名 str = null; j = 0; byte[] bytArtist = new byte[30];//將歌手名部分讀到一個單獨的數組中 for (i = currentIndex; i < currentIndex + 30; i++) { bytArtist[j] = Info[i]; position++; j++; } currentIndex = position; mp3Info.Artist = Foxer_Player_1._1.Mp3FileInfo.byteToString(bytArtist); //獲取唱片名 str = null; j = 0; byte[] bytAlbum = new byte[30];//將唱片名部分讀到一個單獨的數組中 for (i = currentIndex; i < currentIndex + 30; i++) { bytAlbum[j] = Info[i]; position++; j++; } currentIndex = position; mp3Info.Album = Foxer_Player_1._1.Mp3FileInfo.byteToString(bytAlbum); //獲取年 str = null; j = 0; byte[] bytYear = new byte[4];//將年部分讀到一個單獨的數組中 for (i = currentIndex; i < currentIndex + 4; i++) { bytYear[j] = Info[i]; position++; j++; } currentIndex = position; mp3Info.Year = Foxer_Player_1._1.Mp3FileInfo.byteToString(bytYear); //獲取注釋 str = null; j = 0; byte[] bytComment = new byte[28];//將注釋部分讀到一個單獨的數組中 for (i = currentIndex; i < currentIndex + 25; i++) { bytComment[j] = Info[i]; position++; j++; } currentIndex = position; mp3Info.Comment = Foxer_Player_1._1.Mp3FileInfo.byteToString(bytComment); //以下獲取保留位 mp3Info.reserved1 = (char)Info[++position]; mp3Info.reserved2 = (char)Info[++position]; mp3Info.reserved3 = (char)Info[++position]; return mp3Info; } /// <summary> /// 將字節數組轉換成字符串 /// </summary> /// <param name = "b">字節數組</param> /// <returns>返回轉換后的字符串</returns> public static string byteToString(byte[] b) { Encoding enc = Encoding.GetEncoding("GB2312"); string str = enc.GetString(b); str = str.Substring(0, str.IndexOf("#CONTENT#") >= 0 ? str.IndexOf("#CONTENT#") : str.Length);//去掉無用字符 return str; } }} |
希望本文所述對大家C#程序設計有所幫助。
