Csharp/C Sharp by API/System.IO/BufferedStream

BufferedStream.Position

  
using System;
using System.IO;
    public class BufStrm
    {
        static public void Main ()
        {
            FileStream strm;
            strm = new FileStream ("test.txt",FileMode.OpenOrCreate,FileAccess.Write);
            strm.SetLength (0);
            BufferedStream bstrm = new BufferedStream (strm);
            string str = "this is a test";
            byte [] b;
            StringToByte (out b, str);
            bstrm.Write (b, 0, b.Length);
            long Pos = bstrm.Position;
            Console.WriteLine ("The buffered stream position is "+ bstrm.Position);
            Console.WriteLine ("The underlying stream position is "+ strm.Position);
            str = "the quick red fox jumps over the lazy brown dog.\r\n";
            StringToByte (out b, str);
            bstrm.Write (b, 0, b.Length);
            Console.WriteLine ("\r\nThe buffered stream position is " +bstrm.Position);
            Console.WriteLine ("The underlying stream position is still "+ strm.Position);
            bstrm.Seek (Pos, SeekOrigin.Begin);
            b[0] = (byte) "T";
            bstrm.Write (b, 0, 1);
            bstrm.Flush ();
            bstrm.Close ();
            strm.Close ();
        }
        static void StringToByte (out byte [] b, string str)
        {
            b = new byte [str.Length];
            for (int x = 0; x < str.Length; ++x)
            {
                b[x] = (byte) str [x];
            }
        }
    }

BufferedStream.Read

 

using System;
using System.IO;
class BufStreamApp
{
    static void Main(string[] args)
    {
        FileStream fs = new FileStream("Hoo.txt",FileMode.Create, FileAccess.ReadWrite);
        BufferedStream bs = new BufferedStream(fs);
        Console.WriteLine("Length: {0}\tPosition: {1}",bs.Length, bs.Position);
   
        for (int i = 0; i < 64; i++)
        {
            bs.WriteByte((byte)i);
        }
        Console.WriteLine("Length: {0}\tPosition: {1}", bs.Length, bs.Position);
        byte[] ba = new byte[bs.Length];
        bs.Position = 0;
        bs.Read(ba, 0, (int)bs.Length);
        foreach (byte b in ba)
        {
            Console.Write("{0,-3}", b);
        }
   
        string s = "Foo";
        for (int i = 0; i < 3; i++)
        {
            bs.WriteByte((byte)s[i]);
        }
        Console.WriteLine("\nLength: {0}\tPosition: {1}\t",bs.Length, bs.Position);
   
        for (int i = 0; i < (256-67)+1; i++)
        {
            bs.WriteByte((byte)i);
        }
        Console.WriteLine("\nLength: {0}\tPosition: {1}\t", bs.Length, bs.Position);
   
        bs.Close();
    }
}

BufferedStream.Write

 
using System;
using System.Windows.Forms;
using System.IO;
public class MainClass 
{
  public static void Main() 
  {
    OpenFileDialog dlgOpen = new OpenFileDialog();
    dlgOpen.Title="Select file to back up";
    if (dlgOpen.ShowDialog() == DialogResult.OK)
    {
      FileStream inStream = File.OpenRead(dlgOpen.FileName);
      FileStream outStream = File.OpenWrite(dlgOpen.FileName + ".bak");
      BufferedStream bufInStream = new BufferedStream(inStream);
      BufferedStream bufOutStream = new BufferedStream(outStream);
      byte[] buf = new byte[4096];
      int bytesRead;
      while ((bytesRead = bufInStream.Read(buf, 0, 4096)) > 0)
        bufOutStream.Write(buf, 0, bytesRead);
      bufOutStream.Flush();
      bufOutStream.Close();
      bufInStream.Close();
      outStream.Close();
      inStream.Close();
    }
  }
}

BufferedStream.WriteByte

 

using System;
using System.IO;
class BufStreamApp
{
    static void Main(string[] args)
    {
        FileStream fs = new FileStream("Hoo.txt",FileMode.Create, FileAccess.ReadWrite);
        BufferedStream bs = new BufferedStream(fs);
        Console.WriteLine("Length: {0}\tPosition: {1}",bs.Length, bs.Position);
   
        for (int i = 0; i < 64; i++)
        {
            bs.WriteByte((byte)i);
        }
        Console.WriteLine("Length: {0}\tPosition: {1}", bs.Length, bs.Position);
        byte[] ba = new byte[bs.Length];
        bs.Position = 0;
        bs.Read(ba, 0, (int)bs.Length);
        foreach (byte b in ba)
        {
            Console.Write("{0,-3}", b);
        }
   
        string s = "Foo";
        for (int i = 0; i < 3; i++)
        {
            bs.WriteByte((byte)s[i]);
        }
        Console.WriteLine("\nLength: {0}\tPosition: {1}\t",bs.Length, bs.Position);
   
        for (int i = 0; i < (256-67)+1; i++)
        {
            bs.WriteByte((byte)i);
        }
        Console.WriteLine("\nLength: {0}\tPosition: {1}\t", bs.Length, bs.Position);
   
        bs.Close();
    }
}

new BufferedStream(FileStream fs)

  
using System;
using System.IO;
public class MainClass
{
    public static int Main(string[] args)
    {
    FileStream dumpFile = new FileStream("Dump.dat", FileMode.Create, FileAccess.ReadWrite);
    BufferedStream myFileBuffer = new BufferedStream(dumpFile);
    
    byte[] str = {127, 0x77, 0x4, 0x0, 0x0, 0x16};
    myFileBuffer.Write(str, 0, str.Length);
    // add changes to file.
    myFileBuffer.Close();  // Flushes.
    dumpFile.Close();  // Flushes.
    return 0;
    }
}