using System;
using System.Collections.Generic;
using System.IO;
using System.Text;

namespace AliKeywordSearch
{
    class Config
    {
        protected string fileName;
        public Config(string fileName)
        {
            this.fileName = fileName;
        }

        //将List转换为TXT文件
        public void WriteListToTextFile(List<string> list)
        {
            //创建一个文件流，用以写入或者创建一个StreamWriter 
            FileStream fs = new FileStream(fileName, FileMode.OpenOrCreate, FileAccess.Write);
            StreamWriter sw = new StreamWriter(fs);
            sw.Flush();
            // 使用StreamWriter来往文件中写入内容 
            sw.BaseStream.Seek(0, SeekOrigin.Begin);
            for (int i = 0; i < list.Count; i++) sw.WriteLine(list[i]);
            //关闭此文件t 
            sw.Flush();
            sw.Close();
            fs.Close();
        }

        //读取文本文件转换为List 
        public List<string> ReadTextFileToList()
        {
            FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
            List<string> list = new List<string>();
            StreamReader sr = new StreamReader(fs);
            //使用StreamReader类来读取文件 
            sr.BaseStream.Seek(0, SeekOrigin.Begin);
            // 从数据流中读取每一行，直到文件的最后一行
            string tmp = sr.ReadLine();
            while (tmp != null)
            {
                list.Add(tmp);
                tmp = sr.ReadLine();
            }
            //关闭此StreamReader对象 
            sr.Close();
            fs.Close();
            return list;
        }
    }
}