我正在尝试更新现有的约会，但EWS正在抛出"Set action is invalid for property."。我查看了设置为约会对象的所有值，但我无法确定此错误的实际原因。
这是我的代码段：
ExchangeService service = new ExchangeService(ExchangeVersion.Exchange2010_SP1);
service.Credentials = new WebCredentials("ews_calendar", PASSWORD, "acme");
service.Url = new Uri("https://acme.com/EWS/Exchange.asmx");
ImpersonatedUserId impUser = new ImpersonatedUserId();
service.ImpersonatedUserId = new ImpersonatedUserId(ConnectingIdType.SmtpAddress, "tin.tin@acme.com");
string itemId = "";
DateTime PreviousStartDate = new DateTime(2012, 04, 02, 18, 00, 00);
DateTime PreviousEndDate = new DateTime(2012, 04, 02, 18, 30, 00);
CalendarView calView = new CalendarView(PreviousStartDate, PreviousEndDate);
Appointment appointment = new Appointment(service);
try
{
calView.PropertySet = new PropertySet(BasePropertySet.IdOnly, AppointmentSchema.Subject, AppointmentSchema.Start, AppointmentSchema.IsRecurring, AppointmentSchema.AppointmentType);
FindItemsResults<Appointment> findResults = service.FindAppointments(WellKnownFolderName.Calendar, calView);
List<Item> items = new List<Item>();
foreach (Appointment appt in findResults.Items)
{
appt.Load();
items.Add(appt);
}
if (items.Count > 0)
{
service.LoadPropertiesForItems(items, PropertySet.FirstClassProperties);
appointment = (Appointment) items[0];
appointment.Load(new PropertySet(BasePropertySet.IdOnly, AppointmentSchema.Start, AppointmentSchema.ReminderDueBy, AppointmentSchema.End, AppointmentSchema.StartTimeZone, AppointmentSchema.EndTimeZone, AppointmentSchema.TimeZone));
}
appointment.RequiredAttendees.Add("tin.tin@acme.com");
appointment.Start = new DateTime(2012, 04, 02, 18, 00, 0);
appointment.End = new DateTime(2012, 04, 02, 18, 30, 0);
// throwing exception here -- Set action is invalid for property.
appointment.Update(ConflictResolutionMode.AlwaysOverwrite, SendInvitationsOrCancellationsMode.SendToAllAndSaveCopy);
}
catch (Exception ex)
{
//
}
[更新]
有趣的是，如果我在上面的代码中评论RequiredAttendees约会属性，一切似乎都很好，但没有通知电子邮件发送给现有与会者。
[更新] 这仅适用于使用iCal创建的约会
[更新]
请求Xml：
POST https://acmemail.com/EWS/Exchange.asmx HTTP/1.1
Content-Type: text/xml; charset=utf-8
Accept: text/xml
User-Agent: ExchangeServicesClient/14.02.0051.000
Accept-Encoding: gzip,deflate
Host: acmemail.com
Cookie: exchangecookie=7d09b9f23afd4604bd17e3aa58aa8417
Content-Length: 2410
Expect: 100-continue
<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Header>
<t:RequestServerVersion Version="Exchange2010_SP1" />
<t:ExchangeImpersonation>
<t:ConnectingSID>
<t:PrincipalName>ews_test_user</t:PrincipalName>
</t:ConnectingSID>
</t:ExchangeImpersonation>
</soap:Header>
<soap:Body>
<m:UpdateItem ConflictResolution="AlwaysOverwrite" SendMeetingInvitationsOrCancellations="SendOnlyToAll">
<m:ItemChanges>
<t:ItemChange>
<t:ItemId Id="AAMkADJiMGQ4ZWFkLWE0ODYtNDEyMC1hYWZjLTQ1ZGMyZDIzM2VjNwBGAAAAAAD9u1KcpHbwQZAL98T9qOWmBwCvOn1fMRuFRKKSfl9h8ZjeAAAAoz9XAABZjjBc5hT0S7NHrduyqC0sAAUlvIcSAAA=" ChangeKey="DwAAABYAAABkzlk3d4yMS7uVVX+i+BnJAAAABLU2" />
<t:Updates>
<t:SetItemField>
<t:FieldURI FieldURI="item:Body" />
<t:CalendarItem>
<t:Body BodyType="HTML">TEST 3</t:Body>
</t:CalendarItem>
</t:SetItemField>
<t:SetItemField>
<t:FieldURI FieldURI="calendar:RequiredAttendees" />
<t:CalendarItem>
<t:RequiredAttendees>
<t:Attendee>
<t:Mailbox>
<t:Name>Tin.Tin</t:Name>
<t:EmailAddress>Tin.Tin@acmegroup.com</t:EmailAddress>
<t:RoutingType>SMTP</t:RoutingType>
<t:MailboxType>Mailbox</t:MailboxType>
</t:Mailbox>
</t:Attendee>
<t:Attendee>
<t:Mailbox>
<t:Name>Tin.Tin</t:Name>
<t:EmailAddress>Tin.Tin@acmegroup.com</t:EmailAddress>
<t:RoutingType>SMTP</t:RoutingType>
<t:MailboxType>OneOff</t:MailboxType>
</t:Mailbox>
</t:Attendee>
</t:RequiredAttendees>
</t:CalendarItem>
</t:SetItemField>
</t:Updates>
</t:ItemChange>
</m:ItemChanges>
</m:UpdateItem>
</soap:Body>
</soap:Envelope>
响应Xml：
<?xml version="1.0" encoding="utf-8"?>
<s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
<s:Header>
<h:ServerVersionInfo MajorVersion="14" MinorVersion="1" MajorBuildNumber="355" MinorBuildNumber="2" Version="Exchange2010_SP1" xmlns:h="http://schemas.microsoft.com/exchange/services/2006/types" xmlns="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"/>
</s:Header>
<s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">
<m:UpdateItemResponse xmlns:m="http://schemas.microsoft.com/exchange/services/2006/messages" xmlns:t="http://schemas.microsoft.com/exchange/services/2006/types">
<m:ResponseMessages>
<m:UpdateItemResponseMessage ResponseClass="Error">
<m:MessageText>Set action is invalid for property.</m:MessageText>
<m:ResponseCode>ErrorInvalidPropertySet</m:ResponseCode>
<m:DescriptiveLinkKey>0</m:DescriptiveLinkKey>
<m:MessageXml>
<t:FieldURI FieldURI="calendar:RequiredAttendees"/></m:MessageXml>
<m:Items/>
</m:UpdateItemResponseMessage>
</m:ResponseMessages>
</m:UpdateItemResponse>
</s:Body>
</s:Envelope>
答案 0 :(得分：7)
如果您想修改PropertySet，则需要将AppointmentSchema.RequiredAttendees添加到RequiredAttendees.Add（ PropertySet正在设置约会架构属性）。您无法修改appointment.Load(new PropertySet(BasePropertySet.IdOnly, AppointmentSchema.Start, AppointmentSchema.ReminderDueBy, AppointmentSchema.End, AppointmentSchema.StartTimeZone, AppointmentSchema.EndTimeZone, AppointmentSchema.TimeZone, AppointmentSchema.RequiredAttendees));
中未包含的属性。
AppointmentState在审核了您的响应XML后，似乎此问题与calendar:RequiredAttendees有关。请参阅this MSDN post以供参考。响应XML会告诉您无法更新的字段（{{1}}）。