ex-21-05

Programming Csharp Source Code(代码) Programming Csharp Source Code

// Example 21-05: Implementing buffered I/O

namespace Programming_CSharp
{
   using System;
   using System.IO;

   class Tester
   {
      const int SizeBuff = 1024;

      public static void Main()
      {
         // make an instance and run it
         Tester t = new Tester();
         t.Run();
      }
        
      // Set it running with a directory name
      private void Run()
      {
         // create binary streams
         Stream inputStream = File.OpenRead(
            @"C:\test\source\folder3.cs");

         Stream outputStream = File.OpenWrite(
            @"C:\test\source\folder3.bak");

         // add buffered streams on top of the
         // binary streams
         BufferedStream bufferedInput = 
            new BufferedStream(inputStream);

         BufferedStream bufferedOutput = 
            new BufferedStream(outputStream);
         byte[] buffer = new Byte[SizeBuff];
         int bytesRead;

         while ( (bytesRead = 
            bufferedInput.Read(buffer,0,SizeBuff)) > 0 )
         {
            bufferedOutput.Write(buffer,0,bytesRead);
         }

         bufferedOutput.Flush();
         bufferedInput.Close();
         bufferedOutput.Close();

      }
   }
}