Form1.cs

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Filter_IP
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {

        }

        private void btn_deal_Click(object sender, EventArgs e)
        {
            string[] array = GetIPAddresses(txt_content.Text);
            string currentDirectory = Environment.CurrentDirectory;
            if (cb_cf.Checked)
            {
                array = RemoveDuplicates(array);
            }
            string[] array2 = array;
            foreach (string text in array2)
            {
                if (!cb_127.Checked || !(text == "127.0.0.1"))
                {
                    lv_ip.Items.Add(text + " " + global::IPLocation.IPLocation.IPLocate(currentDirectory + "//data.dat", text));
                }
            }
        }

        private static string[] GetIPAddresses(string text)
        {
            string pattern = "\\b(?:\\d{1,3}\\.){3}\\d{1,3}\\b";
            MatchCollection matchCollection = Regex.Matches(text, pattern);
            string[] array = new string[matchCollection.Count];
            for (int i = 0; i < matchCollection.Count; i++)
            {
                array[i] = matchCollection[i].Value;
            }
            return array;
        }

        private static string[] RemoveDuplicates(string[] array)
        {
            HashSet<string> hashSet = new HashSet<string>(array);
            string[] array2 = new string[hashSet.Count];