嗨Kevin，Live Connect不提供对XBox数据的访问：

http://social.msdn.microsoft.com/论坛/ PL / messengerconnect /线程/ bba7a41a-6716-47b9-b750-0037aa721a4b

As an application developer, I would like to check if a given Windows Live account has an associated Xbox Live gamertag so that I can display the avatar for my user.  Any assistance would be greatly appreciated.

Hi Kevin, Live Connect doesn't provide access to XBox data:

http://social.msdn.microsoft.com/Forums/pl/messengerconnect/thread/bba7a41a-6716-47b9-b750-0037aa721a4b