Kembali ke .Net 2.0 hari saya juga memiliki soket jaringan dan mengubah aliran byte menjadi struktur yang bermakna. Saat ini hanya ada satu solusi untuk melakukannya secara manual dengan BitConverter dan kelas Buffer.
Sayangnya saya tidak dapat menemukan contohnya lagi di web. Jadi aku melucuti kelas lamaku (wah, ini terlihat sangat tua dan jelek...). Mungkin karena strip down, ada beberapa kesalahan ketik kecil di dalamnya, tapi ini akan memberi Anda ide bagus tentang cara menyelesaikan masalah tersebut.
using System;
using System.Collections.Generic;
using System.Text;
namespace VehicleSpeedTracer
{
public class Datagram
{
//Offsets im ByteArray
private const int SizeOffset = 0;
private const int TimeOffset = SizeOffset + sizeof(uint);
private const int SpeedOffset = TimeOffset + sizeof(double);
private const int UnitOffset = SpeedOffset + sizeof(char);
private const int UnitMaxSize = (int)MaxSize - UnitOffset;
//Daten Current
public const uint MaxSize = 128;
public TimeSpan CurrentTime;
public double CurrentSpeed;
public string Unit;
public uint Size
{
get { return MaxSize - (uint)UnitMaxSize + (uint)Unit.Length; }
}
public Datagram()
{
}
public Datagram(Datagram Data)
{
CurrentTime = Data.CurrentTime;
CurrentSpeed = Data.CurrentSpeed;
Unit = Data.Unit;
}
public Datagram(byte[] RawData)
{
CurrentTime = TimeSpan.FromSeconds(GetDouble(RawData, TimeOffset));
CurrentSpeed = GetDouble(RawData, SpeedOffset);
Unit = GetString(RawData, UnitOffset, (int)(GetUInt(RawData, SizeOffset) - UnitOffset));
}
public override string ToString()
{
return this.CurrentTime.Hours.ToString().PadLeft(2, '0') + ":" +
this.CurrentTime.Minutes.ToString().PadLeft(2, '0') + ":" +
this.CurrentTime.Seconds.ToString().PadLeft(2, '0') + "." +
this.CurrentTime.Milliseconds.ToString().PadLeft(3, '0') + " " +
this.Unit;
}
public static implicit operator byte[](Datagram Data)
{
byte[] RawData;
RawData = new byte[Data.Size];
SetUInt(RawData, SizeOffset, Data.Size);
SetDouble(RawData, TimeOffset, Data.CurrentTime.TotalDays);
SetDouble(RawData, SpeedOffset, Data.CurrentSpeed);
SetString(RawData, UnitOffset, Data.Unit);
return RawData;
}
#region Utility Functions
// utility: get a uint from the byte array
private static uint GetUInt(byte[] aData, int Offset)
{
return BitConverter.ToUInt32(aData, Offset);
}
// utility: set a uint into the byte array
private static void SetUInt(byte[] aData, int Offset, uint Value)
{
byte[] buint = BitConverter.GetBytes(Value);
Buffer.BlockCopy(buint, 0, aData, Offset, buint.Length);
}
// utility: get a ushort from the byte array
private static ushort GetUShort(byte[] aData, int Offset)
{
return BitConverter.ToUInt16(aData, Offset);
}
// utility: set a ushort into the byte array
private static void SetUShort(byte[] aData, int Offset, int Value)
{
byte[] bushort = BitConverter.GetBytes((short)Value);
Buffer.BlockCopy(bushort, 0, aData, Offset, bushort.Length);
}
// utility: get a double from the byte array
private static double GetDouble(byte[] aData, int Offset)
{
return BitConverter.ToDouble(aData, Offset);
}
// utility: set a double into the byte array
private static void SetDouble(byte[] aData, int Offset, double Value)
{
byte[] bushort = BitConverter.GetBytes(Value);
Buffer.BlockCopy(bushort, 0, aData, Offset, bushort.Length);
}
// utility: get a unicode string from the byte array
private static string GetString(byte[] aData, int Offset, int Length)
{
String sReturn = Encoding.ASCII.GetString(aData, Offset, Length);
return sReturn;
}
// utility: set a unicode string in the byte array
private static void SetString(byte[] aData, int Offset, string Value)
{
byte[] arr = Encoding.ASCII.GetBytes(Value);
Buffer.BlockCopy(arr, 0, aData, Offset, arr.Length);
}
#endregion
}
public delegate void DatagramEventHandler(object sender, DatagramEventArgs e);
public class DatagramEventArgs : EventArgs
{
public Datagram Data;
public DatagramEventArgs(Datagram Data)
{
this.Data = Data;
}
}
}
person
Oliver
schedule
25.02.2010
