EWS：编辑RequiredAttendees 时“设置操作对属性无效”

Question

在您将其作为重复项关闭之前，请查看另一个类似标题的问题，他刚刚将其标记为已回答并离开的问题没有答案。

每当我尝试在约会中编辑 RequiredAttendees 属性时，我都会从 EWS 托管 API 中收到这个可爱的描述性错误。

Set action is invalid for property.

查看异常详细信息告诉我，确实是 RequiredAttendees 属性导致了问题，但我不知道为什么。

我用来连接服务的凭据是会议组织者的凭据，我什至尝试过冒充用户但没有运气。挠头想弄清楚这里出了什么问题。

以下是导致问题的更新例程的相关部分。

PropertySet props = new PropertySet(
        AppointmentSchema.Start,
        AppointmentSchema.End,
        AppointmentSchema.Id,
        AppointmentSchema.Organizer,
        AppointmentSchema.Subject,
        AppointmentSchema.Body,
        AppointmentSchema.RequiredAttendees);
props.RequestedBodyType = BodyType.Text;

Appointment appointment = Appointment.Bind(_service, new ItemId(appointmentId), props);

if (IsResource(appointment.Organizer.Address) && appointment.Organizer.Address != resourceId)
{
    /*
    * removed for brevity, no attendee manipulation here
    */
}
else 
{
    List<Attendee> remove = new List<Attendee>();
    foreach (var attendee in appointment.RequiredAttendees)
    {
        if (IsResource(attendee.Address) && attendee.Address != resourceId)
        {
            remove.Add(attendee);
        }
    }
    remove.ForEach(a => appointment.RequiredAttendees.Remove(a));
    if (!appointment.RequiredAttendees.Any(a => a.Address == resourceId))
    {
        appointment.RequiredAttendees.Add(resourceId);
    }
}

/*
* removed for brevity, no attendee manipulation here
*/

if (IsAvailable(resourceId, startTime, endTime, appointmentId))
    appointment.Update(ConflictResolutionMode.AlwaysOverwrite, SendInvitationsOrCancellationsMode.SendToAllAndSaveCopy);
else
    throw new RoomUnavailableException();

请求跟踪：

<Trace Tag = "EwsRequest" Tid="14" Time="2017-09-25 20:20:24Z" Version="15.00.0847.030">
  <?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 = "Exchange2013" />
    </ soap:Header>
    <soap:Body>
      <m:UpdateItem ConflictResolution = "AlwaysOverwrite" SendMeetingInvitationsOrCancellations="SendToAllAndSaveCopy">
        <m:ItemChanges>
          <t:ItemChange>
            <t:ItemId Id = "AAMkAGEwYWRjZjA3LWNlZjAtNDI2Ny05ZjQwLWUzYWZjOThhMjkzNwBGAAAAAABWdX+yf6THTpO/1LYpoG6xBwD6lEwS6u8XQbDhIlTh/X/UAAAAAAENAAD6lEwS6u8XQbDhIlTh/X/UAAAi3oSdAAA=" ChangeKey="DwAAABYAAAD6lEwS6u8XQbDhIlTh/X/UAAAi3ocU" />
            <t:Updates>
              <t:SetItemField>
                <t:FieldURI FieldURI = "calendar:RequiredAttendees" />
                < t:CalendarItem>
                  <t:RequiredAttendees>
                    <t:Attendee>
                      <t:Mailbox>
                        <t:Name>Exchange Test</t:Name>
                        <t:EmailAddress>etest @supertester.com</t:EmailAddress>
                        <t:RoutingType>SMTP</t:RoutingType>
                        <t:MailboxType>Mailbox</t:MailboxType>
                      </t:Mailbox>
                    </t:Attendee>
                    <t:Attendee>
                      <t:Mailbox>
                        <t:EmailAddress>redroom @supertester.com</t:EmailAddress>
                      </t:Mailbox>
                    </t:Attendee>
                  </t:RequiredAttendees>
                </t:CalendarItem>
              </t:SetItemField>
            </t:Updates>
          </t:ItemChange>
        </m:ItemChanges>
      </m:UpdateItem>
    </soap:Body>
  </soap:Envelope>
</Trace>

响应跟踪：

<Trace Tag = "EwsResponse" Tid="14" Time="2017-09-25 20:20:24Z" Version="15.00.0847.030">
  <?xml version = "1.0" encoding="utf-8"?>
  <s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/">
    <s:Header>
      <h:ServerVersionInfo MajorVersion = "15" MinorVersion="1" MajorBuildNumber="225" MinorBuildNumber="41" Version="V2_48" xmlns:h="http://schemas.microsoft.com/exchange/services/2006/types" xmlns="http://schemas.microsoft.com/exchange/services/2006/types" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" />
    </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>
</Trace>

Answer 1

请注意，“RequiredAttendees”对象仅在会议时才会被填充。

在你的 else 语句中添加这个检查

if(appointment.IsMeeting)
{
  List<Attendee> remove = new List<Attendee>();
 foreach (var attendee in appointment.RequiredAttendees)
 {
    if (IsResource(attendee.Address) && attendee.Address != resourceId)
    {
        remove.Add(attendee);
    }
 }
 remove.ForEach(a => appointment.RequiredAttendees.Remove(a));
 if (!appointment.RequiredAttendees.Any(a => a.Address == resourceId))
 {
    appointment.RequiredAttendees.Add(resourceId);
 }
}

预约会议物业信息MSDN link

Answer 2

非常感谢 Glen Scales 为我指明了正确的方向。

当我检索约会时，我使用了以下代码：

CalendarFolder calendar = CalendarFolder.Bind(_service, new FolderId(WellKnownFolderName.Calendar, resourceId), PropertySet.IdOnly);
CalendarView cView = new CalendarView(startDate, endDate, _maxAppointments);
cView.PropertySet = new PropertySet(PropertySet.IdOnly);
FindItemsResults<Appointment> appointments = calendar.FindAppointments(cView);

resourceId 是房间邮箱的地址，而不是会议的组织者。

不允许编辑非原始约会的与会者，这就是给我带来错误的原因。为了更新与会者，我必须使用以下代码检索组织者约会（大量借用 this post）：

appointment = FindOrganizerAppointment(appointment);

/// <summary>
/// Finds the related Appointment.
/// </summary>
/// <param name="appointment">The appointment whose original is to be found.</param>
/// <returns></returns>
private Appointment FindOrganizerAppointment(Appointment appointment)
{
    try
    {
        Impersonate(appointment.Organizer.Address);

        var filter = new SearchFilter.IsEqualTo
        {
            PropertyDefinition = new ExtendedPropertyDefinition
                (DefaultExtendedPropertySet.Meeting, 0x03, MapiPropertyType.Binary),
            Value = GetObjectIdStringFromUid(appointment.ICalUid)
        };

        var view = new ItemView(1) { PropertySet = new PropertySet(BasePropertySet.FirstClassProperties) };

        return _service.FindItems(WellKnownFolderName.Calendar, filter, view).Items[0] as Appointment;
    }
    catch (Exception e)
    {
         throw e;
    }
    finally
    {
        DisableImpersonation();
    }
}

/// <summary>
/// Gets the object id string from uid.
/// <remarks>The UID is formatted as a hex-string and the GlobalObjectId is displayed as a Base64 string.</remarks>
/// </summary>
/// <param name="id">The uid.</param>
/// <returns></returns>
private static string GetObjectIdStringFromUid(string id)
{
    var buffer = new byte[id.Length / 2];
    for (int i = 0; i < id.Length / 2; i++)
    {
        var hexValue = byte.Parse(id.Substring(i * 2, 2), System.Globalization.NumberStyles.AllowHexSpecifier);
        buffer[i] = hexValue;
    }
    return Convert.ToBase64String(buffer);
}