[EWS]查找 文件夹

摘要

有时在操作exchange的时候，需要查找用户exchange文件夹，比如用户新建了一些文件夹。

一个例子

这里以查找用户outlook邮箱中的历史对话文件夹为例。

  private const ExchangeVersion EXCHANGE_VERSION = ExchangeVersion.Exchange2010_SP2;

        private ExchangeService _service;

        public MyExchangeClient(UserInfo userInfo)

        {

            if (userInfo == null)

            {

                throw new ArgumentNullException("user is empty");

            }

            this._userInfo = userInfo;

            this._service = new ExchangeService(EXCHANGE_VERSION);

   _service.Credentials = new NetworkCredential(userInfo.Itcode, userInfo.Pwd, _userInfo.Domain);

                _service.Url = new Uri(ConfigManager.ExchangeServerUrl);

        }

 /// <summary>

        /// 查找对话历史文件夹

        /// </summary>

        /// <returns></returns>

        private Folder FindImHistoryFolder()

        {

            int _pageSize = ;

            FolderView folderView = new FolderView(_pageSize, );

            folderView.PropertySet = new PropertySet(BasePropertySet.IdOnly);

            folderView.PropertySet.Add(FolderSchema.DisplayName);

            folderView.PropertySet.Add(FolderSchema.ChildFolderCount);

            folderView.Traversal = FolderTraversal.Shallow;

            Folder imHistoryFolder = null;

            FindFoldersResults findFolderResults;

            bool foundImHistoryFolder = false;

            do

            {

                findFolderResults = this._service.FindFolders(WellKnownFolderName.MsgFolderRoot, folderView);

                foreach (Folder folder in findFolderResults)

                {

                    if (folder.DisplayName.ToLower() == "conversation history" || folder.DisplayName.ToLower() == "对话历史记录")

                    {

                        imHistoryFolder = folder;

                        foundImHistoryFolder = true;

                    }

                }

                folderView.Offset += _pageSize;

            } while (findFolderResults.MoreAvailable && !foundImHistoryFolder);

            return imHistoryFolder;

        }