using System;
using System.Collections;
using System.IO;
namespace ConsoleApplication1
{
/// <summary>
/// File sort class
/// </summary>
public class FileSort : IComparer
{
private FileOrder _fileorder;
private FileAsc _fileasc;
/// <summary>
/// The constructor
/// </summary>
public FileSort()
: this(FileOrder.Name, FileAsc.Asc)
{ }
/// <summary>
/// The constructor
/// </summary>
/// <param name="fileorder"></param>
public FileSort(FileOrder fileorder)
: this(fileorder, FileAsc.Asc)
{ }
/// <summary>
/// The constructor
/// </summary>
/// <param name="fileorder"></param>
/// <param name="fileasc"></param>
public FileSort(FileOrder fileorder, FileAsc fileasc)
{
_fileorder = fileorder;
_fileasc = fileasc;
}
/// <summary>
/// The comparison function
/// </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(" Parameter is not FileInfo The class instance .");
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>
/// Sorting based on
/// </summary>
public enum FileOrder
{
/// <summary>
/// The file name
/// </summary>
Name,
/// <summary>
/// The size of the
/// </summary>
Length,
/// <summary>
/// type
/// </summary>
Extension,
/// <summary>
/// Creation time
/// </summary>
CreationTime,
/// <summary>
/// Access time
/// </summary>
LastAccessTime,
/// <summary>
/// Modify the time
/// </summary>
LastWriteTime
}
/// <summary>
/// Ascending and descending order
/// </summary>
public enum FileAsc
{
/// <summary>
/// ascending
/// </summary>
Asc,
/// <summary>
/// Descending order
/// </summary>
Desc
}
}