在 Exchange 中使用 EWS 创建约会和会议

  • 项目

了解如何使用 Exchange 中的 EWS 托管 API 或 EWS 更新约会和会议。

会议和约会之间的基本区别在于会议有与会者，而约会没有。 约会和会议可以是单个实例或定期系列的一部分，但由于约会不包括与会者、会议室或资源，因此不需要发送消息。 在内部，Exchange 对会议和约会使用相同的对象。 使用 EWS 托管 API Appointment 类 或 EWS CalendarItem 元素来处理会议和约会。

表 1. 用于更新约会和会议的 EWS 托管 API 方法和 EWS 操作

EWS 托管 API 方法 相应的 EWS 操作
Appointment.Update
UpdateItem

UpdateItemResponse

使用 EWS 托管 API 更新文件夹

下面的代码示例演示如何使用 Appointment 对象更新与约会关联的属性，以及如何使用 Update 方法将约会保存到日历文件夹。

此示例假定已对 Exchange 服务器进行了身份验证，并且已获取名为 service 的 ExchangeService 对象。 本地变量 appointmentId 是与现有约会关联的标识符。

// Instantiate an appointment object by binding to it by using the ItemId.
// As a best practice, limit the properties returned to only the ones you need.
Appointment appointment = Appointment.Bind(service, appointmentId, new PropertySet(AppointmentSchema.Subject, AppointmentSchema.Start, AppointmentSchema.End));
string oldSubject = appointment.Subject;
// Update properties on the appointment with a new subject, start time, and end time.
appointment.Subject = appointment.Subject + " moved one hour later and to the day after " + appointment.Start.DayOfWeek + "!";
appointment.Start.AddHours(25);
appointment.End.AddHours(25);
// Unless explicitly specified, the default is to use SendToAllAndSaveCopy.
// This can convert an appointment into a meeting. To avoid this,
// explicitly set SendToNone on non-meetings.
SendInvitationsOrCancellationsMode mode = appointment.IsMeeting ? 
    SendInvitationsOrCancellationsMode.SendToAllAndSaveCopy : SendInvitationsOrCancellationsMode.SendToNone;
// Send the update request to the Exchange server.
appointment.Update(ConflictResolutionMode.AlwaysOverwrite, mode);
// Verify the update.
Console.WriteLine("Subject for the appointment was \"" + oldSubject + "\". The new subject is \"" + appointment.Subject + "\"");

使用 EWS 更新约会

以下示例中的请求和响应 XML 对应于使用 EWS 托管 API 更新约会中由 EWS 托管 API 代码进行的调用。

以下示例显示使用 UpdateItem 操作更新约会时的请求 XML。

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:m="https://schemas.microsoft.com/exchange/services/2006/messages"
       xmlns:t="https://schemas.microsoft.com/exchange/services/2006/types" xmlns:soap="https://schemas.xmlsoap.org/soap/envelope/">
  <soap:Header>
    <t:RequestServerVersion Version="Exchange2007_SP1" />
    <t:TimeZoneContext>
      <t:TimeZoneDefinition Id="Pacific Standard Time" />
    </t:TimeZoneContext>
  </soap:Header>
  <soap:Body>
    <m:UpdateItem MessageDisposition="SaveOnly" ConflictResolution="AlwaysOverwrite" SendMeetingInvitationsOrCancellations="SendToNone">
      <m:ItemChanges>
        <t:ItemChange>
          <t:ItemId Id="AAMkA" ChangeKey="DwAAAB" />
          <t:Updates>
            <t:SetItemField>
              <t:FieldURI FieldURI="item:Subject" />
              <t:CalendarItem>
                <t:Subject>Tennis Lesson moved one hour later and to the day after Wednesday!</t:Subject>
              </t:CalendarItem>
            </t:SetItemField>
          </t:Updates>
        </t:ItemChange>
      </m:ItemChanges>
    </m:UpdateItem>
  </soap:Body>
</soap:Envelope>

以下示例显示了响应 UpdateItem 请求时返回的 XML。 ItemId 和 ChangeKey 属性会缩短，以实现可读性。

<?xml version="1.0" encoding="utf-8"?>
<s:Envelope xmlns:s="https://schemas.xmlsoap.org/soap/envelope/">
  <s:Header>
    <h:ServerVersionInfo MajorVersion="15" MinorVersion="0" MajorBuildNumber="815" MinorBuildNumber="6" Version="V2_7" 
 xmlns:h="https://schemas.microsoft.com/exchange/services/2006/types" xmlns="https://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="https://schemas.microsoft.com/exchange/services/2006/messages" xmlns:t="https://schemas.microsoft.com/exc
hange/services/2006/types">
      <m:ResponseMessages>
        <m:UpdateItemResponseMessage ResponseClass="Success">
          <m:ResponseCode>NoError</m:ResponseCode>
          <m:Items>
            <t:CalendarItem>
              <t:ItemId Id="AAMkA" ChangeKey="DwAAAB" />
            </t:CalendarItem>
          </m:Items>
          <m:ConflictResults>
            <t:Count>0</t:Count>
          </m:ConflictResults>
        </m:UpdateItemResponseMessage>
      </m:ResponseMessages>
    </m:UpdateItemResponse>
  </s:Body>
</s:Envelope>

使用 EWS 托管 API 更新文件夹

更新会议时，除了将修改后的约会项目保存至日历文件夹外，通常还希望向与会者发送更新的会议请求。 以下代码示例演示如何更新会议并发送会议请求。

此示例假定已对 Exchange 服务器进行了身份验证，并且已获取名为 service 的 ExchangeService 对象。 本地变量 meetingId 是一个与现有约会关联的标识符。

// Instantiate an appointment object by binding to it using the ItemId.
// As a best practice, limit the properties returned to only the Appointment ID.
Appointment meeting = Appointment.Bind(service, meetingId, new PropertySet(AppointmentSchema.Subject, 
                                                                           AppointmentSchema.Location, 
                                                                           AppointmentSchema.RequiredAttendees, 
                                                                           AppointmentSchema.Resources));
string oldSubject = meeting.Subject;
// Update properties on the appointment with a new subject, location, an additional required attendee, and a resource.
meeting.Subject = "Team building exercise has moved!";
meeting.Location = "4567 Contoso Way, Redmond, OH 33333, USA";
meeting.RequiredAttendees.Add("alisa@contoso.com");
meeting.Resources.Add("dlpprojector@contoso.com");
// Send the update request to the Exchange server.
meeting.Update(ConflictResolutionMode.AlwaysOverwrite, SendInvitationsOrCancellationsMode.SendToAllAndSaveCopy);
// Verify the update.
Console.WriteLine("Subject for the meeting was \"" + oldSubject + "\". The new subject is \"" + meeting.Subject + "\"");

在 Appointment 对象上设置属性后，使用 Update 方法将会议保存到日历文件夹并发送更新的会议请求。

调用 Update 方法时，可以将两个枚举值之一作为参数传递：

将 ConflictResolutionMode 枚举值设置为 AlwaysOverwrite 时，会议版本将始终保存到日历文件夹中。

使用 EWS 更新文件夹

以下示例中的请求和响应 XML 对应于使用 EWS 托管 API 更新会议中的 EWS 托管 API 代码所调用的调用。

以下示例显示使用 UpdateItem 操作更新会议时的请求 XML。

<?xml version="1.0" encoding="utf-8"?>
<soap:Envelope xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:m="https://schemas.microsoft.com/exchange/services/2006/messages"
               xmlns:t="https://schemas.microsoft.com/exchange/services/2006/types" xmlns:soap="https://schemas.xmlsoap.org/soap/envelope/">
  <soap:Header>
    <t:RequestServerVersion Version="Exchange2007_SP1" />
    <t:TimeZoneContext>
      <t:TimeZoneDefinition Id="Pacific Standard Time" />
    </t:TimeZoneContext>
  </soap:Header>
  <soap:Body>
    <m:UpdateItem MessageDisposition="SaveOnly" ConflictResolution="AlwaysOverwrite" SendMeetingInvitationsOrCancellations="SendToAllAndSaveCopy">
      <m:ItemChanges>
        <t:ItemChange>
          <t:ItemId Id="AAMkA" ChangeKey="DwAAA" />
          <t:Updates>
            <t:SetItemField>
              <t:FieldURI FieldURI="item:Subject" />
              <t:CalendarItem>
                <t:Subject>Team building exercise has moved!</t:Subject>
              </t:CalendarItem>
            </t:SetItemField>
            <t:SetItemField>
              <t:FieldURI FieldURI="calendar:Location" />
              <t:CalendarItem>
                <t:Location>4567 Contoso Way, Redmond, OH 33333, USA</t:Location>
              </t:CalendarItem>
            </t:SetItemField>
            <t:SetItemField>
              <t:FieldURI FieldURI="calendar:RequiredAttendees" />
              <t:CalendarItem>
                <t:RequiredAttendees>
                  <t:Attendee>
                    <t:Mailbox>
                      <t:Name>Mack.Chaves@contoso.com</t:Name>
                      <t:EmailAddress>Mack.Chaves@contoso.com</t:EmailAddress>
                      <t:RoutingType>SMTP</t:RoutingType>
                    </t:Mailbox>
                  </t:Attendee>
                  <t:Attendee>
                    <t:Mailbox>
                      <t:Name>Sadie.Daniels@contoso.com</t:Name>
                      <t:EmailAddress>Sadie.Daniels@contoso.com</t:EmailAddress>
                      <t:RoutingType>SMTP</t:RoutingType>
                    </t:Mailbox>
                  </t:Attendee>
                  <t:Attendee>
                    <t:Mailbox>
                      <t:EmailAddress>alisa@contoso.com</t:EmailAddress>
                    </t:Mailbox>
                  </t:Attendee>
                </t:RequiredAttendees>
              </t:CalendarItem>
            </t:SetItemField>
            <t:SetItemField>
              <t:FieldURI FieldURI="calendar:Resources" />
              <t:CalendarItem>
                <t:Resources>
                  <t:Attendee>
                    <t:Mailbox>
                      <t:EmailAddress>dlpprojector@contoso.com</t:EmailAddress>
                    </t:Mailbox>
                  </t:Attendee>
                </t:Resources>
              </t:CalendarItem>
            </t:SetItemField>
          </t:Updates>
        </t:ItemChange>
      </m:ItemChanges>
    </m:UpdateItem>
  </soap:Body>
</soap:Envelope>

以下示例显示了响应 UpdateItem 请求时返回的 XML。 为了增加可读性，已缩短 ChangeKey 和 ItemId 属性。

<?xml version="1.0" encoding="utf-8"?>
<s:Envelope xmlns:s="https://schemas.xmlsoap.org/soap/envelope/">
  <s:Header>
    <h:ServerVersionInfo MajorVersion="15" MinorVersion="0" MajorBuildNumber="815" MinorBuildNumber="6" Version="V2_7" 
 xmlns:h="https://schemas.microsoft.com/exchange/services/2006/types" 
 xmlns="https://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="https://schemas.microsoft.com/exchange/services/2006/messages" xmlns:t="https://schemas.microsoft.com/exchange/services/2006/types">
      <m:ResponseMessages>
        <m:UpdateItemResponseMessage ResponseClass="Success">
          <m:ResponseCode>NoError</m:ResponseCode>
          <m:Items>
            <t:CalendarItem>
              <t:ItemId Id="AAMkA" ChangeKey="DwAAA" />
            </t:CalendarItem>
          </m:Items>
          <m:ConflictResults>
            <t:Count>0</t:Count>
          </m:ConflictResults>
        </m:UpdateItemResponseMessage>
      </m:ResponseMessages>
    </m:UpdateItemResponse>
  </s:Body>
</s:Envelope>

另请参阅