EWS 托管 API - 忽略会议请求

Question

使用 EWS API 使用以下代码从邮箱中检索未读邮件。它也在检索会议请求（或邀请）。有没有办法忽略这些类型的电子邮件？

//search filter to get unread email
var searchFilter = new SearchFilter.SearchFilterCollection(LogicalOperator.And, new SearchFilter.IsEqualTo(EmailMessageSchema.IsRead, false));

//count of unread emails to retrieve
var view = new ItemView(50) { PropertySet = new PropertySet(PropertySet.IdOnly) };

//properties to return in the result set
var propertySet = new PropertySet {
    ItemSchema.Subject,
    ItemSchema.Body,
    ItemSchema.HasAttachments,
    ItemSchema.DateTimeReceived };

//order the search results by the DateTimeReceived in asc order
view.OrderBy.Add(ItemSchema.DateTimeReceived, SortDirection.Ascending);

//set the traversal to shallow - shallow is the default option other options are Associated and SoftDeleted
FindItemsResults<Item> findResults;

do {
    //get emails from Inbox using search filter, view and retrieve properties defined above
    findResults = exchangeService.FindItems(WellKnownFolderName.Inbox, searchFilter, view);
    if (findResults.Items.Count > 0)
    {
        //do stuff
    }
    view.Offset += findResults.Items.Count;
} while (findResults.MoreAvailable);

Answer 1

会议请求将具有不同的 ItemClass，因此您可以在客户端过滤它们（我会这样做）或创建一个 SearchFilter 以仅返回 ItemClass 为 IPF.Note 的项目（但是您可能会错过一些物品以这种方式）。