[EWS]查找 文件夹

色粉盒撒娇

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 = 10;
FolderView folderView = new FolderView(_pageSize, 0);
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;
}