near_card_attendance/NearCardAttendance.Service/TcpServer/Protocol/ProtocolWrapper.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace NearCardAttendance.Service.TcpServer.Protocol
{
    public class ProtocolWrapper
    {
        private string Length { get; }

        private string FuncNo { get; }
        private string SeqNo { get; }

        private string Data { get; }


        public ProtocolWrapper(string funcNo,string seqNo,string data)
        {
            
            FuncNo =funcNo;
            SeqNo=seqNo;
            Data=data;
            Length = CalculateMessageLength();
        }

        private string CalculateMessageLength()
        {
            return string.Format("{0:D4}", GenerateProtocolString().Length + 4);
        }

        public string GenerateProtocolString()
        {
            return $"{Length}{FuncNo}{SeqNo}{Data}";
        }
    } 
       
}