searchFilter与EWS FindItems方法调用无法正常工作

我使用SearchFilter集合来限制使用EWS将请求返回到Exchange 2010邮箱的电子邮件。

我没有问题连接到服务，并打开邮箱。

问题是我的searchFilter被忽略，所有电子邮件都被请求返回给EWS。

这是我的代码：

static void Main(string[] args) { ServicePointManager.ServerCertificateValidationCallback = CertificateValidationCallBack; //creates an object that will represent the desired mailbox Mailbox mb = new Mailbox(@"bbtest@bocuk.local"); // Find all items where the body contains "move reports". //string qstring = "Body:"move reports""; // Identify the item properties to return. //view.PropertySet = new PropertySet(BasePropertySet.IdOnly, //ItemSchema.Subject); //creates a folder object that will point to inbox fold FolderId fid = new FolderId(WellKnownFolderName.Inbox, mb); //this will bind the mailbox you're looking for using your service instance Folder inbox = Folder.Bind(service, fid); List searchFilterCollection = new List(); searchFilterCollection.Add(new SearchFilter.SearchFilterCollection(LogicalOperator.And, new SearchFilter.IsEqualTo(EmailMessageSchema.IsRead, false))); searchFilterCollection.Add(new SearchFilter.SearchFilterCollection(LogicalOperator.And, new SearchFilter.IsEqualTo(EmailMessageSchema.HasAttachments, true))); searchFilterCollection.Add(new SearchFilter.Not(new SearchFilter.ContainsSubstring(ItemSchema.Subject, "FATS"))); searchFilterCollection.Add(new SearchFilter.Not(new SearchFilter.ContainsSubstring(ItemSchema.Subject, "Assignment"))); searchFilterCollection.Add(new SearchFilter.Not(new SearchFilter.ContainsSubstring(ItemSchema.Subject, "Sandbox: Assignment"))); SearchFilter searchFilter = new SearchFilter.SearchFilterCollection(LogicalOperator.Or, searchFilterCollection.ToArray()); ItemView view = new ItemView(100); string sAttachmentPath = "C:\Dev\EWSHelloWorld\attachments\"; // Find the first email message in the Inbox that has attachments. This results in a FindItem operation call to EWS. FindItemsResults results = service.FindItems(WellKnownFolderName.Inbox, searchFilter, view); foreach (EmailMessage email in results) // looping through all the emails { System.Diagnostics.Debug.Write("Found attachemnt on msg with subject: " + email.Subject); .... code removed for brevity! 

因此，根据我对searchFilter的理解，只应返回带有附件的未读电子邮件，并且不应将 FATS或Sandbox：Assignment作为主题。

但这不起作用，对EWS的请求只是返回所有电子邮件。

我做错了什么？

 SearchFilter.SearchFilterCollection searchFilterCollection = new SearchFilter.SearchFilterCollection(LogicalOperator.And); searchFilterCollection.Add(new SearchFilter.IsEqualTo(EmailMessageSchema.IsRead, false)); searchFilterCollection.Add(new SearchFilter.IsEqualTo(EmailMessageSchema.HasAttachments, true)); searchFilterCollection.Add(new SearchFilter.Not(new SearchFilter.ContainsSubstring(EmailMessageSchema.Subject, "FATS"))); searchFilterCollection.Add(new SearchFilter.Not(new SearchFilter.ContainsSubstring(EmailMessageSchema.Subject, "Assignment"))); searchFilterCollection.Add(new SearchFilter.Not(new SearchFilter.ContainsSubstring(EmailMessageSchema.Subject, "Sandbox: Assignment"))); FindItemsResults results = service.FindItems(WellKnownFolderName.Inbox, searchFilterCollection, new ItemView(100));