C# 流

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using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading.Tasks;using System.IO;//流namespace Stream{    class Program    {        static void Main(string[] args)        {            Stream2();            Console.ReadKey();        }        static void Stream1()        {            string filePath = "D:\\test.txt";            //利用File.Open建立一個FileStream實體            using (FileStream filestream = File.Open(filePath, FileMode.Open))            {                //定義字串                string msg = "hello world";//string msg =Console.ReadLine();                //將字串轉化為位元組資料                byte[] msgAsByteArray = Encoding.Default.GetBytes(msg);                Console.WriteLine("開始寫入到檔案中{0}", msg);                //將位元組資料寫入到流中                filestream.Write(msgAsByteArray, 0, msgAsByteArray.Length);                //重設流中的位置                filestream.Seek(0, SeekOrigin.Begin);                Console.WriteLine("寫入檔案中的資料為:");                //定義位元組數組                byte[] bytesFormFile = new byte[msgAsByteArray.Length];                //從流中讀取到位元組資料                filestream.Read(bytesFormFile, 0, msgAsByteArray.Length);                Console.WriteLine(Encoding.Default.GetString(bytesFormFile));            }        }        /// <summary>        /// StreamWriter與StreamReader        /// </summary>        static void Stream2()        {            string filePath = "D:\\test.txt";            using (FileStream filestream = File.Open(filePath, FileMode.Open))            {                //定義字串                string msg = "hello world(你好)";//string msg =Console.ReadLine();                //建立StreamWriter對象System.Text.Encoding.Default:編碼格式                StreamWriter streamwriter = new StreamWriter(filestream,System.Text.Encoding.Default);                Console.WriteLine("開始寫入{0}到檔案中", msg);                streamwriter.Write(msg);                //建立StreamReader對象                StreamReader streamreader = new StreamReader(filestream, Encoding.Default);                //這裡將讀不到資料，因為還未寫入完成                Console.WriteLine("寫入到檔案中資料為{0}", streamreader.ReadToEnd());                //關閉                streamwriter.Close();                streamreader.Close();            }        }    }}

Stream繼承結構:

 

C# 流