buffereddemo.cs

北大青鸟内部资料

using System;
using System.IO;

namespace Example_6
{
	class BufferedDemo
	{
		const int sizeBuff = 1024;
		public static void Main( )
		{
			Console.WriteLine ("请输入文件名：");
			string name = Console.ReadLine(); 
		
			Console.WriteLine ("请输入备份文件名：");
			string backup = Console.ReadLine(); 
		
			if(File.Exists(name))
			{
				Stream inputStream = File.OpenRead(name);

				Stream outputStream = File.OpenWrite(backup);
		
				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);
				}
				Console.WriteLine();
				Console.WriteLine("给定文件的备份已创建");
				bufferedOutput.Flush( );
				bufferedInput.Close( );
				bufferedOutput.Close( );
			}
			else
			{
				Console.WriteLine("文件不存在");
			}
		}
	}
}