C# 随机获取国内IP

调用getRandomIp()方法即可
Framework3.5 +使用LINQ

public string getRandomIp()
        {     /*
     int[][]
     这个叫交错数组,白话文就是数组的数组.
    初始化的方法:
     int[][] numbers = new int[][] { new int[] {2,3,4}, new int[] {5,6,7,8,9} };
当然也可以使用{}初始化器初始化
             int[][] numbers = { new int[] {2,3,4},
                            new int[] {5,6,7,8,9}
                          };
     */
         int[][] range = {new int[]{,},//36.56.0.0-36.63.255.255
new int[]{,},//61.232.0.0-61.237.255.255
new int[]{,},//106.80.0.0-106.95.255.255
new int[]{,},//121.76.0.0-121.77.255.255
new int[]{,},//123.232.0.0-123.235.255.255
new int[]{-,-},//139.196.0.0-139.215.255.255
new int[]{-,-},//171.8.0.0-171.15.255.255
new int[]{-,-},//182.80.0.0-182.92.255.255
new int[]{-,-},//210.25.0.0-210.47.255.255
 new int[]{-,-}, //222.16.0.0-222.95.255.255
};

            Random rdint = new Random();
            int index = rdint.Next();
            string ip = num2ip(range[index][] + new Random().Next(range[index][] - range[index][]));
            return ip;
        }

        /*
         * 将十进制转换成ip地址
        */
        public string num2ip(int ip)
        {
            int[] b = new int[];
            string x = "";
            //位移然后与255 做高低位转换
            b[] = (int)((ip >> ) & 0xff);
            b[] = (int)((ip >> ) & 0xff);
            b[] = (int)((ip >> ) & 0xff);
            b[] = (int)(ip & 0xff);
            x = (b[]).ToString() + "." + (b[]).ToString() + "." + (b[]).ToString() + "." + (b[]).ToString();

            return x;
        }

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

namespace ConsoleApplication1
{
    class Program
    {
        static Dictionary<int, int> ips = new int[][]
            {
                Enumerable.Range(,  -  + ).ToArray(),
                Enumerable.Range(,  -  + ).ToArray(),
                Enumerable.Range(,  -  + ).ToArray(),
                Enumerable.Range(,  -  + ).ToArray(),
                Enumerable.Range(,  -  + ).ToArray(),
                Enumerable.Range(-, - +  + ).ToArray(),
                Enumerable.Range(-, - +  + ).ToArray(),
                Enumerable.Range(-, - +  + ).ToArray(),
                Enumerable.Range(-, - +  + ).ToArray(),
                Enumerable.Range(-, - +  + ).ToArray()
            }.SelectMany(x => x).Select((x, i) => new { x, i }).ToDictionary(x => x.i, x => x.x);

        static string IpToString(int IP)
        {
            return string.Join(".", BitConverter.GetBytes(IP).Reverse().Select(x => ((int)x).ToString()));
        }

        static int GenIP()
        {
            return ips[new Random(Guid.NewGuid().GetHashCode()).Next(, ips.Count)];
        }

        static void Main(string[] args)
        {
            for (int i = ; i < ; i++)
                Console.WriteLine(IpToString(GenIP()));
        }
    }
}

加了比较不容易理解部分的注释..想弄明白的同学想必现在已经明白了吧