C#文件流的读写

 1 using System;
 2 using System.IO;
 3 using System.Text;
 4 namespace LearnFileStream
 5 {
 6     class Program
 7     {
 8         string path = @"E:\AdvanceCSharpProject\LearnCSharp\LearnFileStream.txt";
 9 
10         private void TestWrite()
11         {
12             //定义写文件流
13             FileStream fsw = new FileStream(path, FileMode.OpenOrCreate);
14             //写入的内容
15             string inputStr = "Learn Advanced C Sharp";
16             //字符串转byte[]
17             byte[] writeBytes = Encoding.UTF8.GetBytes(inputStr);
18             //写入
19             fsw.Write(writeBytes, 0, writeBytes.Length);
20             //关闭文件流
21             fsw.Close();
22         }
23 
24         private void TestRead()
25         {
26             //定义读文件流
27             FileStream fsr = new FileStream(path, FileMode.Open);
28             //开辟内存区域 1024 * 1024 bytes
29             byte[] readBytes = new byte[1024 * 1024];
30             //开始读数据
31            int count = fsr.Read(readBytes, 0, readBytes.Length);
32             //byte[]转字符串
33             string readStr = Encoding.UTF8.GetString(readBytes, 0, count);
34             //关闭文件流
35             fsr.Close();
36             //显示文件内容
37             Console.WriteLine(readStr);
38         }
39         static void Main(string[] args)
40         {
41             new Program().TestWrite();
42             new Program().TestRead();
43         }
44     }
45 }