这几天闲着无聊，想做个简单的KTV管理系统！查阅资料才知道歌曲本身自带歌曲的详细信息。于是查阅了相关资料并且不断摸索，对网上的两种方法做了简单的验证。结果如下：
代码1：
1 ShellClass sh = new ShellClass(); 2 Folder dir = sh.NameSpace(Path.GetDirectoryName(file)); 3 FolderItem item = dir.ParseName(Path.GetFileName(file)); 4 string str = dir.GetDetailsOf(item, 27) ; // 获取歌曲时长。 5 MessageBox.Show(str); 6 7 // 如果执行过程中，出现是错误提示，通过Shell32 的 Embed Interop Types 属性设置为 False 即可；
这这种方法得到了验证，是可行的！主要是利用windows自带的com组件调用！
对于shell。dll库具体说明如下：
首先引用COM组件 Microsoft Shell Controls And Automation 这里需要注意 DLL的属性Embed Interop Type 设为False 否则会引起互操作类型异常 代码如下 ShellClass sh = new ShellClass(); Folder dir = sh.NameSpace(Path.GetDirectoryName(sFile)); FolderItem item = dir.ParseName(Path.GetFileName(sFile)); string det = dir.GetDetailsOf(item, iCol); iCol 对应文件详细属性汇总 ID => DETAIL-NAME 0 => Name 1 => Size // MP3 文件大小 2 => Type 3 => Date modified 4 => Date created 5 => Date accessed 6 => Attributes 7 => Offline status 8 => Offline availability 9 => Perceived type 10 => Owner 11 => Kinds 12 => Date taken 13 => Artists // MP3 歌手 14 => Album // MP3 专辑 15 => Year 16 => Genre 17 => Conductors 18 => Tags 19 => Rating 20 => Authors 21 => Title // MP3 歌曲名 22 => Subject 23 => Categories 24 => Comments 25 => Copyright 26 => # 27 => Length // MP3 时长 28 => Bit rate 29 => Protected 30 => Camera model 31 => Dimensions 32 => Camera maker 33 => Company 34 => File description 35 => Program name 36 => Duration 37 => Is online 38 => Is recurring 39 => Location 40 => Optional attendee addresses 41 => Optional attendees 42 => Organizer address 43 => Organizer name 44 => Reminder time 45 => Required attendee addresses 46 => Required attendees 47 => Resources 48 => Free/busy status 49 => Total size 50 => Account name 51 => Computer 52 => Anniversary 53 => Assistant's name 54 => Assistant's phone 55 => Birthday 56 => Business address 57 => Business city 58 => Business country/region 59 => Business P.O. box 60 => Business postal code 61 => Business state or province 62 => Business street 63 => Business fax 64 => Business home page 65 => Business phone 66 => Callback number 67 => Car phone 68 => Children 69 => Company main phone 70 => Department 71 => E-mail Address 72 => E-mail2 73 => E-mail3 74 => E-mail list 75 => E-mail display name 76 => File as 77 => First name 78 => Full name 79 => Gender 80 => Given name 81 => Hobbies 82 => Home address 83 => Home city 84 => Home country/region 85 => Home P.O. box 86 => Home postal code
第二种方法 是利用自己编写的函数！总所周知，歌曲信息往往存在二进制文件最后的128个字节中，我们可以通过字节操作来获取对应的信息。代码如下：
using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.IO; namespace GetVideoInfor { class Class1 { public struct Mp3Info { public string identify;//TAG，三个字节 public string Title;//歌曲名,30个字节 public string Artist;//歌手名,30个字节 public string Album;//所属唱片,30个字节 public string Year;//年,4个字符 public string Comment;//注释,28个字节 public char reserved1;//保留位，一个字节 public char reserved2;//保留位，一个字节 public char reserved3;//保留位，一个字节 } /// <summary> /// 获取MP3文件最后128个字节 /// </summary> /// <param name="FileName">文件名</param> /// <returns>返回字节数组</returns> public 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; } public string ReadAuthor(Stream binary_file) { System.Text.Encoding encoding = System.Text.Encoding.UTF8; // Read string from binary file with UTF8 encoding byte[] buffer = new byte[30]; binary_file.Read(buffer, 0, 30); return encoding.GetString(buffer); } /// <summary> /// 获取MP3歌曲的相关信息 /// </summary> /// <param name = "Info">从MP3文件中截取的二进制信息</param> /// <returns>返回一个Mp3Info结构</returns> public Mp3Info getMp3Info(byte[] Info) { Mp3Info mp3Info = new Mp3Info(); string str = null; int i; int position = 0;//循环的起始值 int currentIndex = 0;//Info的当前索引值 //获取TAG标识 for (i = currentIndex; i < currentIndex + 3; i++) { str = str + (char)Info[i]; position++; } currentIndex = position; mp3Info.identify = str; //获取歌名 str = null; byte[] bytTitle = new byte[30];//将歌名部分读到一个单独的数组中 int j = 0; for (i = currentIndex; i < currentIndex + 30; i++) { bytTitle[j] = Info[i]; position++; j++; } currentIndex = position; mp3Info.Title = this.byteToString(bytTitle); //获取歌手名 str = null; j = 0; byte[] bytArtist = new byte[30];//将歌手名部分读到一个单独的数组中 for (i = currentIndex; i < currentIndex + 30; i++) { bytArtist[j] = Info[i]; position++; j++; } currentIndex = position; mp3Info.Artist = this.byteToString(bytArtist); //获取唱片名 str = null; j = 0; byte[] bytAlbum = new byte[30];//将唱片名部分读到一个单独的数组中 for (i = currentIndex; i < currentIndex + 30; i++) { bytAlbum[j] = Info[i]; position++; j++; } currentIndex = position; mp3Info.Album = this.byteToString(bytAlbum); //获取年 str = null; j = 0; byte[] bytYear = new byte[4];//将年部分读到一个单独的数组中 for (i = currentIndex; i < currentIndex + 4; i++) { bytYear[j] = Info[i]; position++; j++; } currentIndex = position; mp3Info.Year = this.byteToString(bytYear); //获取注释 str = null; j = 0; byte[] bytComment = new byte[28];//将注释部分读到一个单独的数组中 for (i = currentIndex; i < currentIndex + 25; i++) { bytComment[j] = Info[i]; position++; j++; } currentIndex = position; mp3Info.Comment =this.byteToString(bytComment); //以下获取保留位 mp3Info.reserved1 = (char)Info[++position]; mp3Info.reserved2 = (char)Info[++position]; mp3Info.reserved3 = (char)Info[++position]; return mp3Info; } /// <summary> /// 将字节数组转换成字符串 /// </summary> /// <param name = "b">字节数组</param> /// <returns>返回转换后的字符串</returns> private 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);//去掉无用字符 return str; // byte[] bs = { 97, 98, 99, 100, 101, 102 }; // string str = System.Text.Encoding.ASCII.GetString(b); // return str; } /// <summary> /// 更改文件名 /// </summary> /// <param name="filePath">文件名</param> /// <returns></returns> private bool ReName(string filePath) { if (File.Exists(filePath)) { Mp3Info mp3Info = new Mp3Info(); mp3Info = this.getMp3Info(this.getLast128(filePath));//读出文件信息 mp3Info.Artist = this.DeleteNotvalue(mp3Info.Artist); mp3Info.Title = this.DeleteNotvalue(mp3Info.Title); if (mp3Info.Artist.Trim().Length == 0) { mp3Info.Artist = "未命名"; } if (mp3Info.Title.Trim().Length == 0) { mp3Info.Title = "未知名歌曲"; } try { //更名 File.Move(filePath, filePath.Substring(0, filePath.ToLower().LastIndexOf("\\")).Trim() + "\\" + "(" + mp3Info.Artist.Trim() + ")" + mp3Info.Title.Trim() + ".mp3"); return true; } catch (Exception) { return false; } } else { return false; } } private string DeleteNotvalue(string p) { throw new NotImplementedException(); }
值得说明的是这种方法我没有成功，不知道是不是因为转换的原因 还是其他什么，倒腾了很久都没有结果！
