/// <summary>
/// 获取所在线客户端id
/// </summary>
/// <returns></returns>
public IEnumerable <Guid> GetClientListByOnline()
{
return(_redis.HKeys($"{_redisPrefix}Online").Select(a => Guid.TryParse(a, out var tryguid) ? tryguid : Guid.Empty).Where(a => a != Guid.Empty));
}