获取邮箱中的所有电子邮件

Question

如何以最少的EWS电话数量从Exchange 2010获取所有电子邮件？

我们的邮箱有2k个文件夹的50k +电子邮件。我已经尝试遍历每个文件夹，但这需要几个小时来获取我的所有电子邮件。我目前的做法是从邮箱中提取所有文件夹，然后制作一个搜索过滤器列表，基本上筛选父文件夹ID为的所有项目，其中包括。

这是我到目前为止。

var allFolders = exchangeService.FindFolders(folderId, 
              new FolderView(int.MaxValue) {Traversal = FolderTraversal.Deep}); 
var searchFilterCollection = new List<SearchFilter>(); 

foreach(var folder in allFolders) 
    searchFilterCollection.Add(new SearchFilter.SearchFilterCollection(LogicalOperator.Or, 
     new SearchFilter.IsEqualTo(ItemSchema.ParentFolderId, folder.Id.ToString()))); 

var itemView = new ItemView(int.MaxValue) 
        { 
         PropertySet = PropertySet.FirstClassProperties 
        }; 
var findItems = exchangeService.FindItems(folderId, 
    new SearchFilter.SearchFilterCollection(LogicalOperator.Or, searchFilterCollection), itemView); 

我收到的错误The property can not be used with this type of restriction.。

Answer 1

如果使用EWS，而不是直接的EWS托管API，你可以使用FindItemOperation做到这一点。 EWS FindItemOperation将多个parentFolderIds作为输入。

http://msdn.microsoft.com/en-us/library/aa566107(v=exchg.140).aspx

Answer 2

http://social.technet.microsoft.com/Forums/en-US/exchangesvrdevelopment/thread/4bd4456d-c859-4ad7-b6cd-42831f4fe7ec/

这似乎是说，ParentFolderId不能在你的过滤器进行访问，因为它尚未加载。

可以指示EWS将其添加到您的文件夹视图来加载它：

FolderView view = new FolderView(int.MaxValue) {Traversal = FolderTraversal.Deep}; 
view.PropertySet.Add(FolderSchema.ParentFolderId); 
var allFolders = exchangeService.FindFolders(folderId,view); 

Answer 3

作为替代在邮箱搜索时，你可以使用AllItems文件夹，并做使用MAPI属性 “PR_PARENT_ENTRYID” 一searchfilter - https://technet.microsoft.com/de-de/sysinternals/gg158149。

// use MAPI property from Items parent entry id 
ExtendedPropertyDefinition MAPI_PARENT_ENTRYID = new ExtendedPropertyDefinition(0x0E09, MapiPropertyType.Binary); 

// get the "AllItems" folder from its account 
folderResult = service.FindFolders(WellKnownFolderName.Root, new SearchFilter.IsEqualTo(FolderSchema.DisplayName, "allitems"), folderView); 
var allItemsFolder = folderResult.FirstOrDefault(); 

// convert EWS Folder Id to MAPI ENTRYID - parentFolderId is us an AlternateId 
var convertedId = service.ConvertIds(parentFolderId, IdFormat.EntryId); 

// use the MAPI Property with its converted PARENT_ENTRY_ID in EWS Searchfilters 
var parent_entry_id = (ids.ConvertedId as AlternateId).UniqueId; 
var searchFilterFolders = new SearchFilter.IsEqualTo(MAPI_PARENT_ENTRYID, parent_entry_id); 

// search in "AllItems" using the searchFilter containing the converted PARENT_ENTRY_ID 
result = service.FindItems(folderId, searchFilterFolders, view);