C# 文件压缩与解压(ZIP格式)

在企业开发过程中经常会遇到文件的压缩与解压,虽然网上很多流行的压缩文件格式都是RAR的,但是由于RAR不是一个开放的标准,因此ZIP成了更多人的选择。如果你不想自己开发的话可以选择开源的项目,比如SharpZipLib就是一个不错的选择。

组件的使用比较简单,请参照下面的代码。点击下载项目源码

/*
 * Gary Zhang -- cbcye@live.com
 * www.cbcye.com
 * www.quicklearn.cn
 * cbcye.cnblogs.com
 
*/

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using ICSharpCode.SharpZipLib.Zip;
using System.Diagnostics;
using ICSharpCode.SharpZipLib.Core;

namespace TestConsole
{
    
class Program
    
{
        
static void Main()
        
{
            
//CreateZipFile(@"d:\", @"d:\a.zip");
            UnZipFile(@"d:\a.zip");

            Console.Read();
        }


        
private static void CreateZipFile(string filesPath, string zipFilePath)
        
{

            
if (!Directory.Exists(filesPath))
            
{
                Console.WriteLine(
"Cannot find directory '{0}'", filesPath);
                
return;
            }


            
try
            
{
                
string[] filenames = Directory.GetFiles(filesPath);
                
using (ZipOutputStream s = new ZipOutputStream(File.Create(zipFilePath)))
                
{

                    s.SetLevel(
9); // 压缩级别 0-9
                    
//s.Password = "123"; //Zip压缩文件密码
                    byte[] buffer = new byte[4096]; //缓冲区大小
                    foreach (string file in filenames)
                    
{
                        ZipEntry entry 
= new ZipEntry(Path.GetFileName(file));
                        entry.DateTime 
= DateTime.Now;
                        s.PutNextEntry(entry);
                        
using (FileStream fs = File.OpenRead(file))
                        
{
                            
int sourceBytes;
                            
do
                            
{
                                sourceBytes 
= fs.Read(buffer, 0, buffer.Length);
                                s.Write(buffer, 
0, sourceBytes);
                            }
 while (sourceBytes > 0);
                        }

                    }

                    s.Finish();
                    s.Close();
                }

            }

            
catch (Exception ex)
            
{
                Console.WriteLine(
"Exception during processing {0}", ex);
            }

        }

     

        //解压缩
        ///zipfilepath 源路径

        ///UnfilePath 解压后的路径

        private static void UnZipFile( string zipFilePath,string unfilepath)
        
{
            
if (!File.Exists(zipFilePath))
            
{
                Console.WriteLine(
"Cannot find file '{0}'", zipFilePath);
                
return;
            }

        string directoryName = Path.GetDirectoryName(theEntry.Name);

          // create directory
             if (directoryName.Length > 0)
            
{
               Directory.CreateDirectory(directoryName);
            }

            using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipFilePath)))
            
{

                ZipEntry theEntry;

          
                
while ((theEntry = s.GetNextEntry()) != null)
                
{

                    Console.WriteLine(theEntry.Name);

                    string fileName = Path.Combine(unZipFilePath,theEntry.Name);

                    

                    
if (fileName != String.Empty)
                    
{
                        
using (FileStream streamWriter = File.Create(fileName))
                        
{

                            
int size = 2048;
                            
byte[] data = new byte[2048];
                            
while (true)
                            
{
                                size 
= s.Read(data, 0, data.Length);
                                
if (size > 0)
                                
{
                                    streamWriter.Write(data, 
0, size);
                                }

                                
else
                                
{
                                    
break;
                                }

                            }

                 streamWriter.close();                     
                        }

                    }

                }

        s.close();
            }

        }

    }


}

原文出自:http://www.cnblogs.com/cbcye/archive/2009/03/10/1407672.html

原文地址:https://www.cnblogs.com/songling/p/2172254.html