NTFS和CDFS下，是按照字母顺序，而FAT下，按照文件创建时间顺序
1 using System; 2 using System.Collections; 3 using System.IO; 4 5 namespace ConsoleApplication1 6 { 7 /// <summary> 8 /// 文件排序类 9 /// </summary> 10 public class FileSort : IComparer 11 { 12 private FileOrder _fileorder; 13 private FileAsc _fileasc; 14 15 /// <summary> 16 /// 构造函数 17 /// </summary> 18 public FileSort() 19 : this(FileOrder.Name, FileAsc.Asc) 20 { } 21 22 /// <summary> 23 /// 构造函数 24 /// </summary> 25 /// <param name="fileorder"></param> 26 public FileSort(FileOrder fileorder) 27 : this(fileorder, FileAsc.Asc) 28 { } 29 30 /// <summary> 31 /// 构造函数 32 /// </summary> 33 /// <param name="fileorder"></param> 34 /// <param name="fileasc"></param> 35 public FileSort(FileOrder fileorder, FileAsc fileasc) 36 { 37 _fileorder = fileorder; 38 _fileasc = fileasc; 39 } 40 41 /// <summary> 42 /// 比较函数 43 /// </summary> 44 /// <param name="x"></param> 45 /// <param name="y"></param> 46 /// <returns></returns> 47 public int Compare(object x, object y) 48 { 49 FileInfo file1 = x as FileInfo; 50 FileInfo file2 = y as FileInfo; 51 FileInfo file3; 52 53 if (file1 == null || file2 == null) 54 throw new ArgumentException("参数不是FileInfo类实例."); 55 56 if (_fileasc == FileAsc.Desc) 57 { 58 file3 = file1; 59 file1 = file2; 60 file2 = file3; 61 } 62 63 switch (_fileorder) 64 { 65 case FileOrder.Name: 66 return file1.Name.CompareTo(file2.Name); 67 case FileOrder.Length: 68 return file1.Length.CompareTo(file2.Length); 69 case FileOrder.Extension: 70 return file1.Extension.CompareTo(file2.Extension); 71 case FileOrder.CreationTime: 72 return file1.CreationTime.CompareTo(file2.CreationTime); 73 case FileOrder.LastAccessTime: 74 return file1.LastAccessTime.CompareTo(file2.LastAccessTime); 75 case FileOrder.LastWriteTime: 76 return file1.LastWriteTime.CompareTo(file2.LastWriteTime); 77 default: 78 return 0; 79 } 80 } 81 } 82 83 /// <summary> 84 /// 排序依据 85 /// </summary> 86 public enum FileOrder 87 { 88 /// <summary> 89 /// 文件名 90 /// </summary> 91 Name, 92 /// <summary> 93 /// 大小 94 /// </summary> 95 Length, 96 /// <summary> 97 /// 类型 98 /// </summary> 99 Extension, 100 /// <summary> 101 /// 创建时间 102 /// </summary> 103 CreationTime, 104 /// <summary> 105 /// 访问时间 106 /// </summary> 107 LastAccessTime, 108 /// <summary> 109 /// 修改时间 110 /// </summary> 111 LastWriteTime 112 } 113 114 /// <summary> 115 /// 升序降序 116 /// </summary> 117 public enum FileAsc 118 { 119 /// <summary> 120 /// 升序 121 /// </summary> 122 Asc, 123 /// <summary> 124 /// 降序 125 /// </summary> 126 Desc 127 } 128 }
1 using System; 2 using System.IO; 3 4 namespace ConsoleApplication1 5 { 6 class Program 7 { 8 static void Main(string[] args) 9 { 10 DirectoryInfo dirInfo = new DirectoryInfo(@"F:abc"); 11 FileInfo[] lstFile = dirInfo.GetFiles(); 12 Array.Sort(lstFile, new FileSort(FileOrder.LastWriteTime)); //按修改日期升序排列 13 foreach (FileInfo file in lstFile) 14 Console.WriteLine(file.Name); 15 16 Console.Read(); 17 18 } 19 } 20 }