QMS.UEditor/ListFileHandler.cs

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using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Web;

namespace QMS.UEditor
{
    /// <summary>
    /// FileManager 的摘要说明
    /// </summary>
    public class ListFileManager : Handler
    {
        enum ResultState
        {
            Success,
            InvalidParam,
            AuthorizError,
            IOError,
            PathNotFound
        }

        private int Start;
        private int Size;
        private int Total;
        private ResultState State;
        private String PathToList;
        private String[] FileList;
        private String[] SearchExtensions;

        public ListFileManager(HttpContext context, string pathToList, string[] searchExtensions)
            : base(context)
        {
            this.SearchExtensions = searchExtensions.Select(x => x.ToLower()).ToArray();
            this.PathToList = pathToList;
        }

        public override void Process()
        {
            try
            {
                Start = String.IsNullOrEmpty(Request["start"]) ? 0 : Convert.ToInt32(Request["start"]);
                Size = String.IsNullOrEmpty(Request["size"]) ? Config.GetInt("imageManagerListSize") : Convert.ToInt32(Request["size"]);
            }
            catch (FormatException)
            {
                State = ResultState.InvalidParam;
                WriteResult();
                return;
            }
            var buildingList = new List<String>();
            try
            {
                var localPath = Server.MapPath(PathToList);
                buildingList.AddRange(Directory.GetFiles(localPath, "*", SearchOption.AllDirectories)
                    .Where(x => SearchExtensions.Contains(Path.GetExtension(x).ToLower()))
                    .Select(x => PathToList + x.Substring(localPath.Length).Replace("\\", "/")));
                Total = buildingList.Count;
                FileList = buildingList.OrderBy(x => x).Skip(Start).Take(Size).ToArray();
            }