C#文件的读写
通过FileStream类进行文件的读写
1.读文件
1 byte[] byData = new byte[100]; 2 char[] charData = new char[1000]; 3 public void Read() 4 { 5 try 6 { 7 FileStream file = new FileStream("E:\\test.txt", FileMode.Open); 8 file.Seek(0, SeekOrigin.Begin); 9 file.Read(byData, 0, 100); //byData传进来的字节数组,用以接受FileStream对象中的数据,第2个参数是字节数组中开始写入数据的位置,它通常是0,表示从数组的开端文件中向数组写数据,最后一个参数规定从文件读多少字符. 10 Decoder d = Encoding.Default.GetDecoder(); 11 d.GetChars(byData, 0, byData.Length, charData, 0); 12 Console.WriteLine(charData); 13 file.Close(); 14 } 15 catch (IOException e) 16 { 17 Console.WriteLine(e.ToString()); 18 } 19 }
2.写文件
public void Write() { FileStream fs = new FileStream("E:\\ak.txt", FileMode.Create); //获得字节数组 byte[] data = System.Text.Encoding.Default.GetBytes("Hello World!"); //开始写入 fs.Write(data, 0, data.Length); //清空缓冲区、关闭流 fs.Flush(); fs.Close(); }
通过StreamReader StreamWriter读写文件
1.读文件
public void Read(string path) { StreamReader sr = new StreamReader(path,Encoding.Default); String line; while ((line = sr.ReadLine()) != null) { Console.WriteLine(line.ToString()); } }
2.写文件
public void Write(string path) { FileStream fs = new FileStream(path, FileMode.Create); StreamWriter sw = new StreamWriter(fs); //开始写入 sw.Write("Hello World!!!!"); //清空缓冲区 sw.Flush(); //关闭流 sw.Close(); fs.Close(); }

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