/// <summary>
/// 构建消息数据包
/// </summary>
/// <param name="Crccode">消息校验码，判断消息开始</param>
/// <param name="sessionid">用户登录成功之后获得的身份ID</param>
/// <param name="command">主命令</param>
/// <param name="subcommand">子命令</param>
/// <param name="encrypt">加密方式</param>
/// <param name="MessageBody">消息内容（string数组）</param>
/// <returns>返回构建完整的数据包</returns>
public static byte[] BuildDataPackage(int Crccode,long sessionid, int command,int subcommand, int encrypt, string[] MessageBody)
{
//消息校验码默认值为0x99FF
Crccode = 65433;
//消息头各个分类数据转换为字节数组（非字符型数据需先转换为网络序 HostToNetworkOrder:主机序转网络序）
byte[] CrccodeByte = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(Crccode));
byte[] sessionidByte = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(sessionid));
byte[] commandByte = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(command));
byte[] subcommandByte = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(subcommand));
byte[] encryptByte = BitConverter.GetBytes(IPAddress.HostToNetworkOrder(encrypt));
//计算消息体的长度
int MessageBodyLength = 0;
for (int i = 0; i < MessageBody.Length; i++)
{
if (MessageBody[i] == "")
break;
MessageBodyLength += Encoding.UTF8.GetBytes(MessageBody[i]).Length;
}
//定义消息体的字节数组（消息体长度MessageBodyLength + 每个消息前面有一个int变量记录该消息字节长度）
byte[] MessageBodyByte = new byte[MessageBodyLength + MessageBody.Length*4];
