imagefilelist.cs

POCKET PC,照片管理系统！提供了真正意义上的目录打开功能

using System;
using System.Collections;

namespace Pex
{
	/// <summary>
	/// Contains the list of the files of type image found in the current selected folder.
	/// Implemented as a singleton
	/// </summary>
	public class ImageFileList
	{
		private ArrayList theList;
		private string current;
		public static readonly ImageFileList Singleton = new ImageFileList();

		protected ImageFileList()
		{
			// 
			// TODO: Add constructor logic here
			//
			theList = new ArrayList();
		}

		public string Next
		{
			get
			{
				int index = theList.IndexOf(current) + 1;
				if( index == theList.Count )
				{
					index = 0;
				}
				
				current = (string)theList[index];
				return current;
			}
		}

		public string Previous
		{
			get
			{
				int index = theList.IndexOf(current) - 1;
				if( index == -1 )
				{
					index = theList.Count - 1;
				}
				
				current = (string)theList[index];
				return current;
			}
		}

		public string Current
		{
			get
			{
				return current;
			}
			set
			{
				current = value;
			}
		}

		public void Add(string file)
		{
			theList.Add(file);
		}

		public void Clear()
		{
			theList.Clear();
		}

		public void RemoveCurrent()
		{
			theList.Remove(current);
			current = "";
		}
	}
}