修改LumaQQ.NET，使其支持长消息发送

     默认LumaQQ.NET不支持发送长消息，只能文字量比较小的文字信息。其实在内部设计上，已经支持了分片发送的功能，只是没有去拆分实现。我们这就来自己实现它。
  
  1.首先在QQGlobal里添加消息最长长度定义：
  
   1: /// <summary> 2: /// 消息最大长度，QQ是最大699字节 LumaQQ里说最长是700，但是我试下来只能是699，700就会出错，不知道为什么 3: /// </summary> 4: public const int QQ_MAX_SEND_IM = 699;
  
  
  2.修改MessageManager里其中2个SendIM的方法
  
   1: /// <summary> 2: /// 发送普通信息 3: /// <remark>abu 2008-03-11 </remark> 4: /// </summary> 5: /// <param name="receiver">The receiver.</param> 6: /// <param name="message">The message.</param> 7: /// <param name="fontSytle">The font sytle.</param> 8: public void SendIM(int receiver, string message, FontStyle fontSytle) 9: { 10: int MaxByte = QQGlobal.QQ_MAX_SEND_IM;//取最长长度 11: 12: 13: if (Encoding.GetEncoding(QQGlobal.QQ_CHARSET_DEFAULT).GetBytes(message).Length > MaxByte)//判断是不是要分段发送 14: { 15: List<byte> messageBytes = new List<byte>(); 16: messageBytes.AddRange(Utils.Util.GetBytes(message)); 17: messageBytes.Add(0x20);//补一个空格，不补似乎也会出问题 18: int messageSize = messageBytes.Count; 19: 20: int totalFragments = ((messageSize % MaxByte) > 0) ? (messageSize / MaxByte + 1) : (messageSize / MaxByte);//计算分片数 21: for (int fragementSequence = 0; fragementSequence < totalFragments; fragementSequence++) 22: { 23: int index = fragementSequence * MaxByte; 24: int BytesSize = ((messageSize - index) > MaxByte) ? MaxByte : (messageSize - index);//不能每次都申请最大长度的byte数组，不然字体会出问题 25: byte[] messageFragementBytes = new byte[BytesSize]; 26: 27: 28: messageBytes.CopyTo(index, messageFragementBytes, 0, BytesSize); 29: SendIM(receiver, messageFragementBytes, totalFragments, fragementSequence, fontSytle); 30: 31: 32: } 33: } 34: else 35: { 36: SendIM(receiver, Utils.Util.GetBytes(message), 1, 0, fontSytle); 37: } 38: } 39: /// <summary> 40: /// 发送普通信息 41: /// <remark>abu 2008-03-11 </remark> 42: /// </summary> 43: /// <param name="receiver">The receiver.</param> 44: /// <param name="message">The message.</param> 45: /// <param name="totalFragments">The total fragments.总分块数</param> 46: /// <param name="fragementSequence">The fragement sequence.当前当块序号</param> 47: /// <param name="fontSytle">The font sytle.</param> 48: public void SendIM(int receiver, byte[] message, int totalFragments, 49: int fragementSequence, FontStyle fontSytle) 50: { 51: SendIMPacket packet = new SendIMPacket(QQUser); 52: packet.Receiver = receiver; 53: packet.Message = message;//Utils.Util.GetBytes(message); 54: packet.TotalFragments = totalFragments; 55: packet.FragmentSequence = fragementSequence; 56: packet.FontStyle = fontSytle; 57: QQClient.PacketManager.SendPacket(packet, QQPort.Main.Name); 58: }