目录文件根据各条件排序代码,CSharp代码库,德仔网

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【CSharp】目录文件根据各条件排序

作者:天楚 / 发布于2015/10/8/ 682


	class FileSort : IComparer
	 {
	 private FileOrder _fileorder;
	 private FileAsc _fileasc;

	 /// <summary>
	 /// 构造函数
	 /// </summary>
	 public FileSort()
	 : this(FileOrder.Name, FileAsc.Asc)
	 { }

	 /// <summary>
	 /// 构造函数
	 /// </summary>
	 /// <param name="fileorder"></param>
	 public FileSort(FileOrder fileorder)
	 : this(fileorder, FileAsc.Asc)
	 { }

	 /// <summary>
	 /// 构造函数
	 /// </summary>
	 /// <param name="fileorder"></param>
	 /// <param name="fileasc"></param>
	 public FileSort(FileOrder fileorder, FileAsc fileasc)
	 {
	 _fileorder = fileorder;
	 _fileasc = fileasc;
	 }

	 /// <summary>
	 /// 比较函数
	 /// </summary>
	 /// <param name="x"></param>
	 /// <param name="y"></param>
	 /// <returns></returns>
	 public int Compare(object x, object y)
	 {
	 FileInfo file1 = x as FileInfo;
	 FileInfo file2 = y as FileInfo;
	 FileInfo file3;

	 if (file1 == null || file2 == null)
	 throw new ArgumentException("参数不是FileInfo类实例.");

	 if (_fileasc == FileAsc.Desc)
	 {
	 file3 = file1;
	 file1 = file2;
	 file2 = file3;
	 }

	 switch (_fileorder)
	 {
	 case FileOrder.Name:
	 return file1.Name.CompareTo(file2.Name);
	 case FileOrder.Length:
	 return file1.Length.CompareTo(file2.Length);
	 case FileOrder.Extension:
	 return file1.Extension.CompareTo(file2.Extension);
	 case FileOrder.CreationTime:
	 return file1.CreationTime.CompareTo(file2.CreationTime);
	 case FileOrder.LastAccessTime:
	 return file1.LastAccessTime.CompareTo(file2.LastAccessTime);
	 case FileOrder.LastWriteTime:
	 return file1.LastWriteTime.CompareTo(file2.LastWriteTime);
	 default:
	 return 0;
	 }

	 }
	 }
	 /// <summary>
	 /// 排序依据
	 /// </summary>
	 public enum FileOrder
	 {
	 /// <summary>
	 /// 文件名
	 /// </summary>
	 Name,
	 /// <summary>
	 /// 大小
	 /// </summary>
	 Length,
	 /// <summary>
	 /// 类型
	 /// </summary>
	 Extension,
	 /// <summary>
	 /// 创建时间
	 /// </summary>
	 CreationTime,
	 /// <summary>
	 /// 访问时间
	 /// </summary>
	 LastAccessTime,
	 /// <summary>
	 /// 修改时间
	 /// </summary>
	 LastWriteTime
	 }

	 /// <summary>
	 /// 升序降序
	 /// </summary>
	 public enum FileAsc
	 {
	 /// <summary>
	 /// 升序
	 /// </summary>
	 Asc,
	 /// <summary>
	 /// 降序
	 /// </summary>
	 Desc
	 }

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