public OnlineUserDto GetUserInfo(string username)
{
var info = (from u in _dal.Find()
join ur in _userRoleServices.Find() on u.Id equals ur.UserId
where u.LoginName == username
select new OnlineUserDto
{
Id = u.Id.ToString(),
Email = u.Email,
HeadImg = u.HeadImg,
NickName = u.RealName,
UserName = u.LoginName,
Roles = (from ur in _userRoleServices.Find()
join r in _roleServices.Find() on ur.RoleId equals r.Id
where ur.UserId == u.Id
select r.Name).ToArray()
}).FirstOrDefault();
return(info);
}