Form1.cs

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using Ivony.Html.Parser;
using Ivony.Html;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Xml.Linq;

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

        private void uiButton1_Click(object sender, EventArgs e)
        {
            string text = uiDatetimePicker1.Value.Year.ToString();
            string text2 = uiDatetimePicker1.Value.Month.ToString();
            int day = uiDatetimePicker1.Value.Day;

            if (day < 10)
            {
                string uri = "http://domain.webmasterhome.cn/com/" + text + "-" + text2 + "-0" + day + ".asp";
                IHtmlDocument container = default(IHtmlDocument);
                try
                {
                    container = new JumonyParser().LoadDocument(uri, Encoding.GetEncoding("utf-8"));
                }
                catch (Exception ex)
                {
                    MessageBox.Show("选择的日期无过期域名，请重新选择。");
                    return;
                }

                string text3 = container.Find("meta[name=keywords]").FirstOrDefault().Attribute("content")
                    .Value()
                    .Split('国')[0];
                string value = container.Find("<pre>").FirstOrDefault().ToString();
                FileStream stream = new FileStream(text3 + ".txt", FileMode.OpenOrCreate, FileAccess.ReadWrite);
                StreamWriter streamWriter = new StreamWriter(stream);
                streamWriter.WriteLine(value);
                streamWriter.Close();
                string currentDirectory = Environment.CurrentDirectory;
                MessageBox.Show("采集完成！文件在" + currentDirectory + "下");
            }
            else
            {
                string uri2 = "http://domain.webmasterhome.cn/com/" + text + "-" + text2 + "-" + day + ".asp";
                IHtmlDocument container2 = default(IHtmlDocument);