Backup/Discuz.Forum/Help.cs

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using System;
using System.Text;
using System.Data.Common;
using System.Data;

using Discuz.Entity;
using Discuz.Data;
using Discuz.Common.Generic;

namespace Discuz.Forum
{
    public class Helps
    {
        /// <summary>
        /// 帮助信息树形列表
        /// </summary>
        private static List<HelpInfo> helpListTree = null;       

        /// <summary>
        /// 获取帮助列表
        /// </summary>
        /// <returns>帮助列表</returns>
        public static List<HelpInfo> GetHelpList()
        {
            Discuz.Cache.DNTCache cache = Discuz.Cache.DNTCache.GetCacheService();
            helpListTree = cache.RetrieveObject("/Forum/helplist") as List<HelpInfo>;

            if (helpListTree == null)
            {
                helpListTree = new List<HelpInfo>();
                List<HelpInfo> helpList = Discuz.Data.Help.GetHelpList();

                CreateHelpTree(helpList, 0);
                cache.AddObject("/Forum/helplist", helpListTree);
            }
            return helpListTree;
        }

        /// <summary>
        /// 递归加载帮助信息树形列表
        /// </summary>
        /// <param name="helpList">源帮助信息列表</param>
        /// <param name="id">当前要递归的父节点helpid信息()</param>
        private static void CreateHelpTree(List<HelpInfo> helpList, int id)
        {
            foreach (HelpInfo helpInfo in helpList)
            {
                if (helpInfo.Pid == id)
                {
                    helpListTree.Add(helpInfo);
                    CreateHelpTree(helpList, helpInfo.Id);
                }                
            }
        }

        /// <summary>
        /// 获取帮助内容
        /// </summary>
        /// <param name="id"></param>
        /// <returns>帮助内容</returns>