asp.net解压缩文件夹

需要用到第三方控件ICSharpCode.SharpZipLib.dll

using System.IO;
using System.IO.Compression;

using ICSharpCode.SharpZipLib.Zip;
using ICSharpCode.SharpZipLib.GZip;
using ICSharpCode.SharpZipLib.Checksums;  

 

 

  #region 压缩文件夹,支持递归

 

/// <summary>
        ///　压缩文件夹
        /// </summary>
        /// <param name="dir">待压缩的文件夹</param>
        /// <param name="targetFileName">压缩后文件路径（包括文件名）</param>
        /// <param name="recursive">是否递归压缩</param>
        /// <returns></returns>
        public bool Compress(string dir, string targetFileName, bool recursive)
        {
            //如果已经存在目标文件，询问用户是否覆盖
            if (File.Exists(targetFileName))
            {
               // if (!_ProcessOverwrite(targetFileName))
                    return false;
            }
            string[] ars = new string[2];
            if (recursive == false)
            {
                //return Compress(dir, targetFileName);
                ars[0] = dir;
                ars[1] = targetFileName;
                return ZipFileDictory(ars);
            } 
            FileStream ZipFile;
            ZipOutputStream ZipStream;

            //open
            ZipFile = File.Create(targetFileName);
            ZipStream = new ZipOutputStream(ZipFile);

            if (dir != String.Empty)
            {
                _CompressFolder(dir, ZipStream, dir);
            }

            //close
            ZipStream.Finish();
            ZipStream.Close();

            if (File.Exists(targetFileName))
                return true;
            else
                return false;
        }

 

 

        /// <summary>
        /// 压缩目录
        /// </summary>
        /// <param name="args">数组(数组[0]: 要压缩的目录; 数组[1]: 压缩的文件名)</param>
        public static bool ZipFileDictory(string[] args)
        {
            ZipOutputStream s=null;
            try
            {
                string[] filenames = Directory.GetFiles(args[0]);

                Crc32 crc = new Crc32();
                 s = new ZipOutputStream(File.Create(args[1]));
                s.SetLevel(6);

                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;

                    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 (Exception e)
            {
                return false;
            }

            finally
            {
                s.Finish();
                s.Close();
            }
            return true;
        }

 

             

        /// <summary>
        /// 压缩某个子文件夹
        /// </summary>
        /// <param name="basePath"></param>
        /// <param name="zips"></param>
        /// <param name="zipfolername"></param>    
        private static void _CompressFolder(string basePath, ZipOutputStream zips, string zipfolername)
        {
            if (File.Exists(basePath))
            {
                _AddFile(basePath, zips, zipfolername);
                return;
            }
            string[] names = Directory.GetFiles(basePath);
            foreach (string fileName in names)
            {
                _AddFile(fileName, zips, zipfolername);
            }

            names = Directory.GetDirectories(basePath);
            foreach (string folderName in names)
            {
                _CompressFolder(folderName, zips, zipfolername);
            }

        }

        /// <summary>
        ///　压缩某个子文件
        /// </summary>
        /// <param name="fileName"></param>
        /// <param name="zips"></param>
        /// <param name="zipfolername"></param>
        private static void _AddFile(string fileName, ZipOutputStream zips, string zipfolername)
        {
            if (File.Exists(fileName))
            {
                _CreateZipFile(fileName, zips, zipfolername);
            }
        }

        /// <summary>
        /// 压缩单独文件
        /// </summary>
        /// <param name="FileToZip"></param>
        /// <param name="zips"></param>
        /// <param name="zipfolername"></param>
        private static void _CreateZipFile(string FileToZip, ZipOutputStream zips, string zipfolername)
        {
            try
            {
                FileStream StreamToZip = new FileStream(FileToZip, FileMode.Open, FileAccess.Read);
                string temp = FileToZip;
                string temp1 = zipfolername;
                if (temp1.Length > 0)
                {
                    int i = temp1.LastIndexOf('//') + 1;
                    int j = temp.Length - i;
                    temp = temp.Substring(i, j);
                }
                ZipEntry ZipEn = new ZipEntry(temp);

                zips.PutNextEntry(ZipEn);
                byte[] buffer = new byte[16384];
                System.Int32 size = StreamToZip.Read(buffer, 0, buffer.Length);
                zips.Write(buffer, 0, size);
                try
                {
                    while (size < StreamToZip.Length)
                    {
                        int sizeRead = StreamToZip.Read(buffer, 0, buffer.Length);
                        zips.Write(buffer, 0, sizeRead);
                        size += sizeRead;
                    }
                }
                catch (System.Exception ex)
                {
                    throw ex;
                }

                StreamToZip.Close();
            }
            catch (Exception e)
            {
                throw e;
            }
        }
        #endregion

 

#region

 /// <summary>  
        /// 功能：解压zip格式的文件。  
        /// </summary>  
        /// <param name="zipFilePath">压缩文件路径</param>  
        /// <param name="unZipDir">解压文件存放路径,为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹</param>  
        /// <param name="err">出错信息</param>  
        /// <returns>解压是否成功</returns>  
        public bool UnZipFile(string zipFilePath, string unZipDir)
        {
            string err = "";
            if (zipFilePath == string.Empty)
            {
                err = "压缩文件不能为空！";
                return false;
            }
            if (!File.Exists(zipFilePath))
            {
                err = "压缩文件不存在！";
                return false;
            }
            //解压文件夹为空时默认与压缩文件同一级目录下，跟压缩文件同名的文件夹  
            if (unZipDir == string.Empty)
                unZipDir = zipFilePath.Replace(Path.GetFileName(zipFilePath), Path.GetFileNameWithoutExtension(zipFilePath));
            if (!unZipDir.EndsWith("//"))
                unZipDir += "//";
            if (!Directory.Exists(unZipDir))
                Directory.CreateDirectory(unZipDir);

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

                   

                    ZipEntry theEntry;
                    while ((theEntry = s.GetNextEntry()) != null)
                    {
                        string directoryName = Path.GetDirectoryName(theEntry.Name);
                        string fileName = Path.GetFileName(theEntry.Name);
                        if (directoryName.Length > 0)
                        {
                            Directory.CreateDirectory(unZipDir + directoryName);
                        }
                        if (!directoryName.EndsWith("//"))
                            directoryName += "//";
                        if (fileName != String.Empty)
                        {
                            using (FileStream streamWriter = File.Create(unZipDir + theEntry.Name))
                            {

                                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;
                                    }
                                }
                            }
                        }
                    }//while  
                }
            }
            catch (Exception ex)
            {
                err = ex.Message;
                return false;
            }
            return true;
        }//解压结束 
        #endregion

 

 

调用：：

             压缩： Class1 cals = new Class1();
                        bool resul = cals.Compress("E://aaaaaaaaa//新建文件夹", "E://aaaaaaaaa//新建文件夹.rar", true);

           解压缩：Class1 cals = new Class1();
                       cals.UnZipFile("E://aaaaaaaaa//新建文件夹.rar", "E://aaaaaaaaa//新建文件夹 (2)//");