C# 文件压缩与解压(ZIP格式)

Hello，大家好，我是网呦，今天分享的内容是：C#操作文件压缩与解压(zip格式)。该文章Core Code 引用于：C#文件压缩与解压
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。

我在引用的程序上，做了优化，现在贴出来。
注意：如果你想运行起来，必须要来下载我提供的整个解决方案(含有两个项目：ISharpZipLib和TestConsole)
关于如何下载，可以到上面的引用地址下载，也可以留下邮箱，我发给你。

TestConsole调用的代码如下：

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");

            Console.WriteLine("Decompressioning the zip file.please wait for serval seconds.");
            UnZipFile(@"C:\Users\Administrator\Desktop\Print.zip",
                      @"C:\Users\Administrator\Desktop\Temps\CodeTemp\c#\CSharpZip\TestConsole\bin\Debug");
            Console.WriteLine("Decompressioned.");
            Console.ReadKey();
        }

        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);
            }
        }

        /// 

        /// Decompression the zip file 
        /// 
        /// the source path of the zip file
        /// What path you want to save the directory that was decompressioned
        private static void UnZipFile(string zipFilePath, string savePath)
        {
            if (!File.Exists(zipFilePath))
            {
                Console.WriteLine("Cannot find file '{0}'", zipFilePath);
                return;
            }

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

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

                    string fullPath = JudgeFullPath(savePath) + theEntry.Name;
                    Console.WriteLine(fullPath);

                    string directoryName = Path.GetDirectoryName(fullPath);
                    string fileName = Path.GetFileName(fullPath);

                    //if (String.IsNullOrEmpty(savePath))
                    //{
                    //    directoryName = savePath + "/"+directoryName;
                    //}
                    // create directory
                    if (directoryName.Length > 0)
                    {
                        Directory.CreateDirectory(directoryName);
                    }

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

                            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;
                                }
                            }
                        }
                    }
                }
            }
        }

        /// 

        /// Judge the last symbol of the full path wether is "/" or not.
        /// 
        /// 
        /// 
        private static string JudgeFullPath(string _path)
        {
            if (!string.IsNullOrEmpty(_path) && _path.Length>4)
            {
                string lastSymbol = _path.Substring(_path.Length - 1);
                if (lastSymbol == "\\")
                {
                    return _path;
                }
                return _path+"\\";
            }
            return _path;
        }
    }

}