使用DotNetZip压缩与解压缩

下载地址：http://dotnetzip.codeplex.com/

解压后找到\\DotNetZipLib-DevKit-v1.9\zip-v1.9\Release下的Ionic.Zip.dll文件拷贝到C盘下

接着打开Visual Studio Command Prompt (2010),然后定位到C盘根目录，依次输入gacutil -i Ionic.Zip.dll 和regasm Ionic.Zip.dll ，然后拷贝C盘下的这个Ionic.Zip.dll到您的应用程序中，添加引用即可！代码例子如下：

[csharp] view plaincopy

.using System;
.using System.Collections.Generic;
.using System.ComponentModel;
.using System.Data;
.using System.Drawing;
.using System.Linq;
.using System.Text;
.using System.Windows.Forms;
.using Ionic.Zip;
.namespace WindowsFormsZIP
.{
.    public partial class Form1 : Form
.    {
.        public Form1()
.        {
.            InitializeComponent();
.        }
.
.        /// <summary>
.        /// 压缩带中文的文件名.
.        /// </summary>
.        /// <param name="sender">The source of the event.</param>
.        /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
.        private void button1_Click(object sender, EventArgs e)
.        {
.
.            using (ZipFile zip = new ZipFile("苏志.zip",Encoding.Default))
.            {
.                zip.AddFile("数据库文档.doc");
.                zip.Save();
.            }
.
.        }
.
.        /// <summary>
.        /// 用密码加密ZIP文件.
.        /// </summary>
.        /// <param name="sender">The source of the event.</param>
.        /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
.        private void button2_Click(object sender, EventArgs e)
.        {
.
.            using (ZipFile zip = new ZipFile())
.            {
.                zip.Password = "123456!";
.                zip.AddFile("WPF 4 Unleashed.pdf");
.                zip.Save("WPF 4 Unleashed.zip");
.            }
.
.        }
.
.        /// <summary>
.        /// 压缩文件夹
.        /// </summary>
.        /// <param name="sender">The source of the event.</param>
.        /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
.        private void button3_Click(object sender, EventArgs e)
.        {
.            using (ZipFile zip = new ZipFile())
.            {
.                zip.AddDirectory(@"E:\suzhi");
.                zip.Comment = "This zip was created at " + System.DateTime.Now.ToString("G");
.                zip.Save("test.zip");
.            }
.        }
.
.        /// <summary>
.        /// 抽取ZIP中的文件到指定的文件夹.
.        /// </summary>
.        /// <param name="sender">The source of the event.</param>
.        /// <param name="e">The <see cref="System.EventArgs"/> instance containing the event data.</param>
.        private void button4_Click(object sender, EventArgs e)
.        {
.            using (ZipFile zip = ZipFile.Read("test.zip"))
.            {
.                foreach (ZipEntry z in zip)
.                {
.                    z.Extract(@"F:\kk");
.                }
.            }
.
.        }
.
.    }
.}  

具体的例子：

//获取压缩包路径
            string filename = material.CreationTime.ToyyyyMMdd().Replace("-", "");

            //string zippath = AppDomain.CurrentDomain.BaseDirectory + "upload\\Zipped\\" + filename;
            //和上面的结果一样
            string zippath = material.FilePath;
            string decomPath = "";
            string nowpath = "";
            if (material.FilePath.Substring(material.FilePath.Length - , ).Equals("zip"))
            { decomPath = material.FilePath.Replace(".zip", ""); }
            if (material.FilePath.Substring(material.FilePath.Length - , ).Equals("rar"))
            { decomPath = material.FilePath.Replace(".rar", ""); }
            //查询此目录下是否存在需要解压过的同名的文件夹名称
            DirectoryInfo direInfo = new DirectoryInfo(decomPath);
            if (direInfo.Exists)
            {
                DirectoryInfo[] childs = direInfo.GetDirectories();
                foreach (DirectoryInfo child in childs)
                {
                    child.Delete(true);
                }
                direInfo.Delete(true);
            }

            //解压文件夹
            using (ZipFile zip = ZipFile.Read(zippath))
            {

                foreach (ZipEntry z in zip)
                {
                    //z.Extract(material.FilePath.Replace(".zip", ""));
                    z.Extract(zippath.Replace(".zip", ""));
                }
            }

            direInfo = new DirectoryInfo(zippath.Replace(".zip", ""));
            if (direInfo.Exists)
            {
                DirectoryInfo[] dirchild = direInfo.GetDirectories();
                if (dirchild.Count() == )
                {
                     nowpath = decomPath + "\\" + dirchild[].Name;
                    direInfo = new DirectoryInfo(nowpath);
                    DirectoryInfo[] dirchild2 = direInfo.GetDirectories();
                    foreach (DirectoryInfo childrens in dirchild2)
                    {

                        //修改文件夹的内容
                        FileStream fs = new FileStream(nowpath +"\\"+ childrens.Name + "\\index.html", FileMode.OpenOrCreate, FileAccess.ReadWrite);
                        string fileText = "";
                        GameServer server = GameServerService.GetGameServerWithGame(materialLog.ServerId);
                        Game game = server.Game;
                        using (StreamReader sr = new StreamReader(fs))
                        {
                            fileText = sr.ReadToEnd();
                            fileText = fileText.Replace("#GameCode#", game.Code);
                            fileText = fileText.Replace("#ServerCode#", server.Code);
                            fileText = fileText.Replace("#ServerId#", Convert.ToString(server.ServerId));
                        }
                        if (fileText != "")
                        {
                            using (StreamWriter sw = new StreamWriter(nowpath + "\\" + childrens.Name + "\\index.html", false, Encoding.Default))
                            {
                                sw.Write(fileText);
                            }
                        }

                    }
                }

            }

            //重新压缩

            using (ZipFile zip = new ZipFile())
            {
                zip.AddDirectory(decomPath);
                zip.Save(nowpath+".zip");
            }