C#将请求得到的数据替换掉本地文件原有的数据

Program.cs

using HtmlAgilityPack;
using Newtonsoft.Json.Linq;
using System;
using System.Collections.Generic;
using System.Configuration;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading.Tasks;

namespace FaqJob
{
     
    class Program
    {
     
        private String id;
        private String thema;
        private int index;
        private string path = ConfigurationManager.AppSettings["Path"];
        private string url = ConfigurationManager.AppSettings["Url"];

        static void Main(string[] args)
        {
     
            var program = new Program();

            program.index = program.select(program.path);

            string new_result = program.getResult(program.url);        
            JArray jArray = JArray.Parse(new_result);
            foreach (var j in jArray)
            {
     
                JObject json = (JObject)j;
                program.id = json["id"].ToString();
                program.thema = json["thema"].ToString();

                program.EditFile(program.index, "
+ program.id + "&artlang=zh\" target=\"_blank\">" + program.thema + "
", program.path);

                program.index++;
                if (program.index == program.select(program.path) + 6)
                {
     
                    break;
                }
            }
        }

        //获取接口数据
        public string getResult(string url)
        {
     
            WebClient client = new WebClient();
            //设置编码格式
            client.Encoding = System.Text.Encoding.UTF8;
            //获取数据
            string result = client.DownloadString(url);
            string new_result = result.Substring(22, result.Length - 23);

            return new_result;
        }

        //修改行数据
        public void EditFile(int curLine, string newLineValue, string patch)
        {
     
            FileStream fs = new FileStream(patch, FileMode.Open, FileAccess.Read);
            StreamReader sr = new StreamReader(fs, Encoding.GetEncoding("utf-8"));
            string line = sr.ReadLine();
            StringBuilder sb = new StringBuilder();
            for (int i = 1; line != null; i++)
            {
     
                sb.Append(line + "\r\n");
                if (i != curLine - 1)
                    line = sr.ReadLine();
                else
                {
     
                    sr.ReadLine();
                    line = newLineValue;
                }
            }
            sr.Close();
            fs.Close();
            FileStream fs1 = new FileStream(patch, FileMode.Open, FileAccess.Write);
            StreamWriter sw = new StreamWriter(fs1, Encoding.GetEncoding("utf-8"));
            sw.Write(sb.ToString());
            sw.Close();
            fs1.Close();
        }

        //查询行数据
        public int select(string patch)
        {
     
            int i = 0;
            StreamReader sr = new StreamReader(patch, Encoding.Default);
            string str = sr.ReadToEnd();
            string[] strArr = str.Split(new string[] {
      "\r\n" }, StringSplitOptions.None);
            for ( i=0; i < strArr.Length; i++)
            {
     
                if (strArr[i].Contains(""))
                {
     
                    break;
                }
            }
            sr.Dispose();
            return i+2;
        }
    }
}

App.config

<configuration>
    <startup> 
        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.5.2" />
    startup>
    <appSettings>
        
        <add key="Path" value="C:/Users/ben/Desktop/faq.html" />
        
        <add key="Url" value="https://faq.perfectclass.cn/main2.php?callback=success_jsonpCallback&_=1567734767662" />
    appSettings>
configuration>