/// <summary>
 /// 添加新记录:单聊
 /// </summary>
 /// <param name="_Sender">发送者</param>
 /// <param name="_Reciver">接收者</param>
 /// <param name="_SendContent">内容</param>
 public static void AddChatInfo(string _Sender, string _Reciver, string _SendContent)
 {
     HttpRuntime.Cache[_Reciver] = true;
     ChatInfo CiItem = new ChatInfo();
     CiItem.Sender = _Sender;
     CiItem.SendContent = _SendContent;
     CiItem.Reciver = _Reciver;
     CiItem.SendTime = DateTime.Now;                 
     ListClass.Engin_ChatList.Add(CiItem);
 }
 public bool PredicateChat(ChatInfo c)
 {
     if ((c.Reciver == UserId) && (c.Sender != UserId))
     {
         return true;
     }
     else
     {
         return false;
     }
 }
 /// <summary>
 /// 添加新记录:群聊
 /// </summary>
 /// <param name="_Sender">发送者</param>
 /// <param name="_SendContent">内容</param>
 public static void AddChatInfo(string _Sender, string _SendContent)
 {
     foreach (UserInfo Uif in ListClass.Engin_UserList)
     {
         ChatInfo CiItem = new ChatInfo();
         CiItem.Sender = _Sender;
         CiItem.Reciver = Uif.UserID;
         HttpRuntime.Cache[CiItem.Reciver] = true;
         CiItem.SendContent = _SendContent;
         CiItem.SendTime = DateTime.Now;
         ListClass.Engin_ChatList.Add(CiItem);
     }
 }