C# Socket 封包和拆包

static void Main(string[] args)
{

short HeadCount = 2;
string sendMsg = "hello world";
byte[] HeadByte= SocketTools.PackHeadBytes(HeadCount);
byte[] Content = Encoding.UTF8.GetBytes(sendMsg);
byte[] sendByte= SocketTools.PackBytes(HeadCount, Content);

}

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

namespace Fangxing_demo.SocketHelper
{

/// <summary>
///
/// </summary>
public class SocketTools
{

/// <summary>
/// 封包头
/// </summary>
/// <param name="packHead"></param>
/// <returns></returns>
public static byte[] PackHeadBytes(short packHead)
{
return BitConverter.GetBytes(packHead);
}

/// <summary>
/// 封包(包含包头和包体)
/// </summary>
/// <param name="packHead"></param>
/// <param name="packBody"></param>
/// <returns></returns>
public static byte[] PackBytes(short packHead, byte[] packBody)
{
byte[] headBytes = BitConverter.GetBytes(packHead);
byte[] packBytes = new byte[headBytes.Length + packBody.Length];
for (int i = 0; i < packBytes.Length; i++)
{
if (i < headBytes.Length)
packBytes[i] = headBytes[i];
else
packBytes[i] = packBody[i - 2];
}
return packBytes;
}

/// <summary>
/// 拆包(返回short包头,out出包体)
/// </summary>
/// <param name="packBytes"></param>
/// <param name="packBody"></param>
/// <returns></returns>
public static short UnPack(byte[] packBytes, out byte[] packBody)
{
byte[] packHead = new byte[2];
packBody = new byte[packBytes.Length - packHead.Length];
for (int i = 0; i < packBytes.Length; i++)
{
if (i < 2)
packHead[i] = packBytes[i];
else
packBody[i - 2] = packBytes[i];
}
short packHeadShort = BitConverter.ToInt16(packHead, 0);
return packHeadShort;
}

/// <summary>
/// 拆包头(参数只有包头)
/// </summary>
/// <param name="packBytes"></param>
/// <returns></returns>
public static short UnPackHead(byte[] packBytes)
{
byte[] packHead = new byte[2];
short packHeadShort = BitConverter.ToInt16(packHead, 0);
return packHeadShort;
}

}
}