c#学习文件的读写

学习记录

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

namespace SrcFile
{
    // 文件读取，写入
    public class FileReaderWriter
    {
        public void ReaderFile()
        {
            try
            {
                // 创建一个 StreamReader 的实例来读取文件 
                // using 语句也能关闭 StreamReader
                using (StreamReader str = new StreamReader("F:\code\C#\ConsoleApplication3\src\test.txt"))
                {
                    string line;

                    // 从文件读取并显示，直到文件的末尾
                    while ((line = str.ReadLine()) != null)
                    {
                        Console.WriteLine(line);
                    }
                }
            }
            catch (Exception e)
            {
                // 向用户显示出错信息
                Console.WriteLine("The file could not read:");
                Console.WriteLine(e.Message);
            }
            Console.ReadKey();
        }

        // 写入文件并显示写入内容,文件不存在时会在项目根目录主动创建
        public void WriteFile()
        {
            string[] names = new string[]{"aaaa aafff1", "sdfsfsdfff1"};
            // true 则追加，默认为 false 每次写入都会被覆盖掉
            using (StreamWriter sw = new StreamWriter("F:\code\C#\ConsoleApplication3\src\test.txt", true))
            {
                foreach (string s in names)
                {
                    sw.WriteLine(s);
                }
            }
            // 从文件中读取并显示每行
            string line = "";
            using (StreamReader sr = new StreamReader("F:\code\C#\ConsoleApplication3\src\test.txt"))
            {
                while ((line = sr.ReadLine()) != null)
                {
                    Console.WriteLine(line);
                }
                Console.ReadKey();
            }
        }
    }
}