C# IP位址與數位（長整數）之間的轉換(參考JAVA 改過來的)

 

資料來源: http://www.iteye.com/topic/254742

https://github.com/jash-git/CS-IP-Int64-Conversion-

 

using System;
	using System.Collections.Generic;
	using System.Linq;
	using System.Text;
	namespace CS_IP_Long
	{
	/*
	JAVA code-http://www.iteye.com/topic/254742
	public static long ip2long(String ip) {
	String[] ips = ip.split(“[.]”);
	long num = 16777216L*Long.parseLong(ips[0]) + 65536L*Long.parseLong(ips[1]) + 256*Long.parseLong(ips[2]) + Long.parseLong(ips[3]);
	return num;
	}
	public static String long2ip(long ipLong) {
	//long ipLong = 1037591503;
	long mask[] = {0x000000FF,0x0000FF00,0x00FF0000,0xFF000000};
	long num = 0;
	StringBuffer ipInfo = new StringBuffer();
	for(int i=0;i<4;i++){
	num = (ipLong & mask[i])>>(i*8);
	if(i>0) ipInfo.insert(0,”.”);
	ipInfo.insert(0,Long.toString(num,10));
	}
	return ipInfo.toString();
	}
	*/
	class Program
	{
	public static Int64 ip2long(String ip)
	{
	String[] ips = ip.Split(‘.‘);
	Int64 num = 16777216L * Convert.ToInt64(ips[0], 10) + 65536L * Convert.ToInt64(ips[1], 10) + 256 * Convert.ToInt64(ips[2], 10) + Convert.ToInt64(ips[3], 10);
	return num;
	}
	public static String long2ip(Int64 ipLong)
	{
	//long ipLong = 1037591503;
	Int64[] mask = new Int64[] { 0x000000FF, 0x0000FF00, 0x00FF0000, 0xFF000000 };
	Int64 num = 0;
	string Buf = ““;
	for(int i=0;i<4;i++){
	num = (ipLong & mask[i])>>(i*8);
	Buf = “.“+num + Buf;
	}
	return Buf.Substring(1);
	}
	public static void pause()
	{
	Console.Write(“Press any key to continue . . . “);
	Console.ReadKey(true);
	}
	static void Main(string[] args)
	{
	Int64 val01 = ip2long(“1.2.3.4“);
	String Str01 = long2ip(val01);
	Int64 val02 = ip2long(“1.2.3.10“);
	String Str02 = long2ip(val02);
	Int64 val03 = ip2long(“192.168.0.5“);
	String Str03 = long2ip(val03);
	//–
	String Str04 = long2ip(3439438016);//驗證API數字
	Int64 val04 = ip2long(Str04);
	pause();
	}
	}
	}