Exchage 2007 Client Application Functions（5） -- 如何设置邮件为已读

public bool SetIsReadFlag(ItemIdType itemId)

{

SetItemFieldType setField = new SetItemFieldType();

MessageType message = new MessageType();

message.IsRead = true;

message.IsReadSpecified = true;

setField.Item1 = message;

PathToUnindexedFieldType path = new PathToUnindexedFieldType();

path.FieldURI = UnindexedFieldURIType.messageIsRead;

setField.Item = path;

ItemChangeType[] updatedItems = new ItemChangeType[1];

updatedItems[0] = new ItemChangeType();

updatedItems[0].Updates = new ItemChangeDescriptionType[1];

updatedItems[0].Updates[0] = setField;

ItemChangeDescriptionType[] updates = new ItemChangeDescriptionType[1];

updates[0] = new ItemChangeDescriptionType();

updates[0].Item = path;

updatedItems[0].Item = new ItemIdType();

((ItemIdType)updatedItems[0].Item).Id = itemId.Id;

((ItemIdType)updatedItems[0].Item).ChangeKey = itemId.ChangeKey;

UpdateItemType request = new UpdateItemType();

request.ItemChanges = updatedItems;

request.ConflictResolution = ConflictResolutionType.AutoResolve;

request.MessageDisposition = MessageDispositionType.SaveOnly;

request.MessageDispositionSpecified = true;

request.SendMeetingInvitationsOrCancellations = CalendarItemUpdateOperationType.SendToChangedAndSaveCopy;

request.SendMeetingInvitationsOrCancellationsSpecified = true;

UpdateItemResponseType response = this.m_esb.UpdateItem(request);

if (response.ResponseMessages.Items[0].ResponseClass != ResponseClassType.Success)

return false;

else

return true;

}