第22节、C#文件IO操作

文件目录、文件夹、记事本创建、值写入、读取记事本值

简单示范：

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

namespace ConsoleApplication1
{
    public class 文件操作
    {
        public static void Main(string[] agrs)
        {
            操作类 cz = new 操作类();
            //注意：路径如果使用\要使用转义字符来表示,即是\\;或者把路径将\字符换成/;或者@"";

            //创建文件
            cz.GetDirectoryInfo("D:\\代码创建","A");

            //查看文件
            cz.QueryDirect("D:\\代码创建");

            //创建文件/删除文件
            cz.Directory_D_C("D:\\代码创建", "B");

            //创建Txt
            cz.GetFileInfo("D:\\代码创建\\A", "Text.txt");

            //在Txt写入值
            cz.GetStreamWriter("D:\\代码创建\\A\\Text.txt","你好程序员");

            //读取文件学习
            cz.GetFileStream("D:\\代码创建\\A\\Text.txt");
            Console.ReadKey();
        }

        
    }

    public class 操作类
    {
        /// <summary>
        /// 【CreateSubdirectory】创建文件
        /// </summary>
        /// <param name="path">路径</param>
        /// <returns></returns>
        public void GetDirectoryInfo(string path,string name)
        {
            DirectoryInfo info = new DirectoryInfo(path);
            info.Create();                                       //创建目录
            if (!File.Exists(path+"\\"+name))                 //文件是否存在
            {
                info.CreateSubdirectory(name);              //在指定路径上创建目录
                Console.WriteLine("DirectoryInfo文件{0}创建完成", name);
            }
        }

        /// <summary>
        /// 【EnumerateDirectories】查看目录下文件
        /// </summary>
        /// <param name="path"></param>
        public void QueryDirect(string path)
        {
           DirectoryInfo info = new DirectoryInfo(path);
           IEnumerable<DirectoryInfo> dir = info.EnumerateDirectories();
           foreach (var vlue in dir)
           {
               Console.WriteLine("DirectoryInfo文件" + vlue.Name);
           }
        }

        /// <summary>
        ///  【Directory】类  是个静态类，不能创建实例，直接通过类名.类成员
        /// </summary>
        /// <param name="path"></param>
        public void Directory_D_C(string path,string name)
        {
            if (!Directory.Exists(path + "\\" + name))
            {
                Directory.CreateDirectory(path + "\\" + name);
                Console.WriteLine("Directory文件{0}创建完成", name);
            }
            else
            {
                Directory.Delete(path + "\\" + name);
                Console.WriteLine("Directory删除文件{0}完成", name);
            }
        }

        /// <summary>
        /// 【FileInfo】创建文件Txt
        /// </summary>
        /// <param name="path"></param>
        /// <param name="FileName"></param>
        public void GetFileInfo(string path,string FileName)
        {
            FileInfo fileinfo = new FileInfo(path + "\\" + FileName);
            if (!fileinfo.Exists)
            {
                fileinfo.Create();                  //创建文件                
                Console.WriteLine("FileInfo文件{0}创建完成", FileName);
            }
        }

        /// <summary>
        /// 【StreamWriter】写值
        /// </summary>
        /// <param name="path"></param>
        /// <param name="str"></param>
        public void GetStreamWriter(string path, string str)
        {
            StreamWriter sw = new StreamWriter(path);
            sw.WriteLine(str);                       //向文件写值
            sw.Flush();                              //刷新缓存
            sw.Close();                              //关闭流
            Console.WriteLine("StreamWriter写值{0}完成", str);
        }

        /// <summary>
        /// 【FileStream】读取文件值
        /// </summary>
        /// <param name="path"></param>
        public void GetFileStream(string path)
        {
            if (File.Exists(path))
            {
                FileStream fst = new FileStream(path, FileMode.Open, FileAccess.Read);
                byte[] byts = new byte[fst.Length];    //定义字节数组
                fst.Read(byts,0,byts.Length);          //读取文件学习
                char[] c = Encoding.UTF8.GetChars(byts);//将自己转换到字符数组中
                foreach (var v in c)
                {
                    Console.WriteLine("FileStream读取值:" + v);    //输出  
                }
                fst.Close();                            //关闭流
            }
        }
    }
}