文件压缩与解压

1.文件压缩事件

 private void button1_Click(object sender, EventArgs e)
        {
            string[] FileProperties = new string[2];
            FileProperties[0] = @"F:sssd";//待压缩文件目录
            FileProperties[1] = @"F:sssd\三国人物.zip";  //压缩后的目标文件
            ZipClass Zc = new ZipClass();
            Zc.ZipFileMain(FileProperties);
            ZipClass.Zip(FileProperties[0], FileProperties[1]);
            
        }

2.文件解压事件

 private void button2_Click(object sender, EventArgs e)
        {
            string[] FileProperties = new string[2];
            FileProperties[0] = @"F:sssd\三国人物.zip";//待解压的文件
            FileProperties[1] = @"F:sssd";//解压后放置的目标目录
            UnZipClass UnZc = new UnZipClass();
            UnZc.UnZip(FileProperties);

        }

3.ZipClass.cs（处理压缩文件类）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ICSharpCode.SharpZipLib.Zip;
using System.IO;
using ICSharpCode.SharpZipLib.Checksums;
using System.Net.Mail;
using System.Net;


namespace 压缩和解压缩
{
    public class ZipClass
    {

        public void ZipFile(string FileToZip, string ZipedFile, int CompressionLevel, int BlockSize)
        {
            //如果文件没有找到，则报错
            if (!System.IO.File.Exists(FileToZip))
            {
                throw new System.IO.FileNotFoundException("The specified file " + FileToZip + " could not be found. Zipping aborderd");
            }

            System.IO.FileStream StreamToZip = new System.IO.FileStream(FileToZip, System.IO.FileMode.Open, System.IO.FileAccess.Read);
            System.IO.FileStream ZipFile = System.IO.File.Create(ZipedFile);
            ZipOutputStream ZipStream = new ZipOutputStream(ZipFile);
            ZipEntry ZipEntry = new ZipEntry("ZippedFile");
            ZipStream.PutNextEntry(ZipEntry);
            ZipStream.SetLevel(CompressionLevel);
            byte[] buffer = new byte[BlockSize];
            System.Int32 size = StreamToZip.Read(buffer, 0, buffer.Length);
            ZipStream.Write(buffer, 0, size);
            try
            {
                while (size < StreamToZip.Length)
                {
                    int sizeRead = StreamToZip.Read(buffer, 0, buffer.Length);
                    ZipStream.Write(buffer, 0, sizeRead);
                    size += sizeRead;
                }
            }
            catch (System.Exception ex)
            {
                throw ex;
            }
            ZipStream.Finish();
            ZipStream.Close();
            StreamToZip.Close();
        }

        public void ZipFileMain(string[] args)
        {
            string[] filenames = Directory.GetFiles(args[0]);

            Crc32 crc = new Crc32();
            ZipOutputStream s = new ZipOutputStream(File.Create(args[1]));

            s.SetLevel(6); // 0 - store only to 9 - means best compression

            foreach (string file in filenames)
            {
                //打开压缩文件
                FileStream fs = File.OpenRead(file);

                byte[] buffer = new byte[fs.Length];
                fs.Read(buffer, 0, buffer.Length);
                ZipEntry entry = new ZipEntry(file);

                entry.DateTime = DateTime.Now;

                // set Size and the crc, because the information
                // about the size and crc should be stored in the header
                // if it is not set it is automatically written in the footer.
                // (in this case size == crc == -1 in the header)
                // Some ZIP programs have problems with zip files that don't store
                // the size and crc in the header.
                entry.Size = fs.Length;
                fs.Close();

                crc.Reset();
                crc.Update(buffer);

                entry.Crc = crc.Value;

                s.PutNextEntry(entry);

                s.Write(buffer, 0, buffer.Length);

            }

            s.Finish();
            s.Close();
        }
        /**/
        /// <summary>
        /// 递归压缩文件夹方法
        /// </summary>
        /// <param name="FolderToZip"></param>
        /// <param name="s"></param>
        /// <param name="ParentFolderName"></param>
        private static bool ZipFileDictory(string FolderToZip, ZipOutputStream s, string ParentFolderName)
         {
             bool res = true;
             string[] folders, filenames;
             ZipEntry entry = null;
             FileStream fs = null;
             Crc32 crc = new Crc32();
 
             try
             {
 
                 //创建当前文件夹
                 entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/"));  //加上 “/” 才会当成是文件夹创建
                 s.PutNextEntry(entry);
                 s.Flush();
 
 
                 //先压缩文件，再递归压缩文件夹 
                 filenames = Directory.GetFiles(FolderToZip);
                 foreach (string file in filenames)
                 {
                     //打开压缩文件
                     fs = File.OpenRead(file);
 
                     byte[] buffer = new byte[fs.Length];
                     fs.Read(buffer, 0, buffer.Length);
                     entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/" + Path.GetFileName(file)));
 
                     entry.DateTime = DateTime.Now;
                     entry.Size = fs.Length;
                     fs.Close();
 
                     crc.Reset();
                     crc.Update(buffer);
 
                     entry.Crc = crc.Value;
 
                     s.PutNextEntry(entry);
 
                     s.Write(buffer, 0, buffer.Length);
                 }
             }
             catch
             {
                 res = false;
             }
             finally
             {
                 if (fs != null)
                 {
                     fs.Close();
                     fs = null;
                 }
                 if (entry != null)
                 {
                     entry = null;
                 }
                 GC.Collect();
                 GC.Collect();
             }
 
 
             folders = Directory.GetDirectories(FolderToZip);
             foreach (string folder in folders)
             {
                 if (!ZipFileDictory(folder, s, Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip))))
                 {
                     return false;
                 }
             }
 
             return res;
        }

        /**/
        /// <summary>
        /// 压缩目录
        /// </summary>
        /// <param name="FolderToZip">待压缩的文件夹，全路径格式</param>
        /// <param name="ZipedFile">压缩后的文件名，全路径格式</param>
        /// <returns></returns>
        private static bool ZipFileDictory(string FolderToZip, string ZipedFile)
        {
            bool res;
            if (!Directory.Exists(FolderToZip))
            {
                return false;
            }

            ZipOutputStream s = new ZipOutputStream(File.Create(ZipedFile));
            s.SetLevel(6);
          
            //s.Password = Password;

            res = ZipFileDictory(FolderToZip, s, "");

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

            return res;
        }

        /**/
        /// <summary>
        /// 压缩文件
        /// </summary>
        /// <param name="FileToZip">要进行压缩的文件名</param>
        /// <param name="ZipedFile">压缩后生成的压缩文件名</param>
        /// <returns></returns>
        private static bool ZipFile(string FileToZip, string ZipedFile)
        {
            //如果文件没有找到，则报错
            if (!File.Exists(FileToZip))
            {
                throw new System.IO.FileNotFoundException("指定要压缩的文件: " + FileToZip + " 不存在!");
            }
            //FileStream fs = null;
            FileStream ZipFile = null;
            ZipOutputStream ZipStream = null;
            ZipEntry ZipEntry = null;

            bool res = true;
            try
            {
                ZipFile = File.OpenRead(FileToZip);
                byte[] buffer = new byte[ZipFile.Length];
                ZipFile.Read(buffer, 0, buffer.Length);
                ZipFile.Close();

                ZipFile = File.Create(ZipedFile);
                ZipStream = new ZipOutputStream(ZipFile);
               // ZipStream.Password = Password;
                ZipEntry = new ZipEntry(Path.GetFileName(FileToZip));
                ZipStream.PutNextEntry(ZipEntry);
                ZipStream.SetLevel(6);

                ZipStream.Write(buffer, 0, buffer.Length);
            }
            catch
            {
                res = false;
            }
            finally
            {
                if (ZipEntry != null)
                {
                    ZipEntry = null;
                }
                if (ZipStream != null)
                {
                    ZipStream.Finish();
                    ZipStream.Close();
                }
                if (ZipFile != null)
                {
                    ZipFile.Close();
                    ZipFile = null;
                }
                GC.Collect();
                GC.Collect();
            }

            return res;
        }

        /**/
        /// <summary>
        /// 压缩文件 和 文件夹
        /// </summary>
        /// <param name="FileToZip">待压缩的文件或文件夹，全路径格式</param>
        /// <param name="ZipedFile">压缩后生成的压缩文件名，全路径格式</param>
        /// <returns></returns>
        public static bool Zip(String FileToZip, String ZipedFile)
        {
            if (Directory.Exists(FileToZip))
            {
                return ZipFileDictory(FileToZip, ZipedFile);
            }
            else if (File.Exists(FileToZip))
            {
                return ZipFile(FileToZip, ZipedFile);
            }
            else
            {
                return false;
            }
        }
       
    }
}

4.UnZipClass.cs（处理解压的文件类）

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using ICSharpCode.SharpZipLib.Zip;
using System.IO;

namespace 压缩和解压缩
{
    public class UnZipClass
    {
        public void UnZip(string[] args)
        {
            ZipInputStream s = new ZipInputStream(File.OpenRead(args[0]));

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

                string directoryName = Path.GetDirectoryName(args[1]);
                string fileName = Path.GetFileName(theEntry.Name);

                //生成解压目录
                Directory.CreateDirectory(directoryName);

                if (fileName != String.Empty)
                {
                    //解压文件到指定的目录
                    FileStream streamWriter = File.Create(args[1] + 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();
        }
        /**/
        /// <summary>
        /// 解压功能(解压压缩文件到指定目录)
        /// </summary>
        /// <param name="FileToUpZip">待解压的文件</param>
        /// <param name="ZipedFolder">指定解压目标目录</param>
        public static void UnZip(string FileToUpZip, string ZipedFolder)
        {
            if (!File.Exists(FileToUpZip))
            {
                return;
            }

            if (!Directory.Exists(ZipedFolder))
            {
                Directory.CreateDirectory(ZipedFolder);
            }

            ZipInputStream s = null;
            ZipEntry theEntry = null;

            string fileName;
            FileStream streamWriter = null;
            try
            {
                s = new ZipInputStream(File.OpenRead(FileToUpZip));
               // s.Password = Password;
                while ((theEntry = s.GetNextEntry()) != null)
                {
                    if (theEntry.Name != String.Empty)
                    {
                        fileName = Path.Combine(ZipedFolder, theEntry.Name);
                        /**/
                        ///判断文件路径是否是文件夹
                        if (fileName.EndsWith("/") || fileName.EndsWith("\"))
                        {
                            Directory.CreateDirectory(fileName);
                            continue;
                        }

                        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;
                            }
                        }
                    }
                }
            }
            finally
            {
                if (streamWriter != null)
                {
                    streamWriter.Close();
                    streamWriter = null;
                }
                if (theEntry != null)
                {
                    theEntry = null;
                }
                if (s != null)
                {
                    s.Close();
                    s = null;
                }
                GC.Collect();
                GC.Collect(1);
            }
        }
    }
}