/// <summary>
 /// 修改,由于刷新存在连接ID变化
 /// </summary>
 /// <param name="connctionId"></param>
 /// <param name="client"></param>
 public void UpdateClient(string connctionId, RealOnlineClient client)
 {
     onlines[connctionId] = client;
 }
 /// <summary>
 /// 添加在线用户
 /// </summary>
 /// <param name="connctionId"></param>
 /// <param name="client"></param>
 public void AddClient(string connctionId, RealOnlineClient client)
 {
     onlines.Add(connctionId, client);
 }