/*获取用户资料：将不为空的ID请求转发至DL，并将反馈结果翻译为数据契约*/
public UserInfo GetUserInfo(string userID, string password) {
UserService userService = new UserService();
UserInfo userInfo = userService.Login(userID, password);
if (userInfo.ErrorMessage == null) {
return userService.GetUserInfo(userID);
}
else {
return userInfo;
}
}