通过ICSharpCode.SharpZipLib类库对zip文件进行压缩与解压

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using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.IO;using ICSharpCode.SharpZipLib.Checksums;using ICSharpCode.SharpZipLib.Zip;namespace DataDisplay.Utilities{    public class ZipHelper    {        #region 压缩        /// <summary>           /// 递归压缩文件夹的内部方法           /// </summary>           /// <param name="folderToZip">要压缩的文件夹路径</param>           /// <param name="zipStream">压缩输出流</param>           /// <param name="parentFolderName">此文件夹的上级文件夹</param>           /// <returns></returns>           private static bool ZipDirectory(string folderToZip, ZipOutputStream zipStream, string parentFolderName)        {            bool result = true;            string[] folders, files;            ZipEntry ent = null;            FileStream fs = null;            Crc32 crc = new Crc32();            try            {                ent = new ZipEntry(Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/"));                zipStream.PutNextEntry(ent);                zipStream.Flush();                files = Directory.GetFiles(folderToZip);                foreach (string file in files)                {                    fs = File.OpenRead(file);                    byte[] buffer = new byte[fs.Length];                    fs.Read(buffer, 0, buffer.Length);                    ent = new ZipEntry(Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/" + Path.GetFileName(file)));                    ent.DateTime = DateTime.Now;                    ent.Size = fs.Length;                    fs.Close();                    crc.Reset();                    crc.Update(buffer);                    ent.Crc = crc.Value;                    zipStream.PutNextEntry(ent);                    zipStream.Write(buffer, 0, buffer.Length);                }            }            catch            {                result = false;            }            finally            {                if (fs != null)                {                    fs.Close();                    fs.Dispose();                }                if (ent != null)                {                    ent = null;                }                GC.Collect();                GC.Collect(1);            }            folders = Directory.GetDirectories(folderToZip);            foreach (string folder in folders)                if (!ZipDirectory(folder, zipStream, folderToZip))                    return false;            return result;        }        /// <summary>           /// 压缩文件夹            /// </summary>           /// <param name="folderToZip">要压缩的文件夹路径</param>           /// <param name="zipedFile">压缩文件完整路径</param>           /// <param name="password">密码</param>           /// <returns>是否压缩成功</returns>           public static bool ZipDirectory(string folderToZip, string zipedFile, string password)        {            bool result = false;            if (!Directory.Exists(folderToZip))                return result;            ZipOutputStream zipStream = new ZipOutputStream(File.Create(zipedFile));            zipStream.SetLevel(6);            if (!string.IsNullOrEmpty(password)) zipStream.Password = password;            result = ZipDirectory(folderToZip, zipStream, "");            zipStream.Finish();            zipStream.Close();            return result;        }        /// <summary>           /// 压缩文件夹           /// </summary>           /// <param name="folderToZip">要压缩的文件夹路径</param>           /// <param name="zipedFile">压缩文件完整路径</param>           /// <returns>是否压缩成功</returns>           public static bool ZipDirectory(string folderToZip, string zipedFile)        {            bool result = ZipDirectory(folderToZip, zipedFile, null);            return result;        }        /// <summary>           /// 压缩文件           /// </summary>           /// <param name="fileToZip">要压缩的文件全名</param>           /// <param name="zipedFile">压缩后的文件名</param>           /// <param name="password">密码</param>           /// <returns>压缩结果</returns>           public static bool ZipFile(string fileToZip, string zipedFile, string password)        {            bool result = true;            ZipOutputStream zipStream = null;            FileStream fs = null;            ZipEntry ent = null;            if (!File.Exists(fileToZip))                return false;            try            {                fs = File.OpenRead(fileToZip);                byte[] buffer = new byte[fs.Length];                fs.Read(buffer, 0, buffer.Length);                fs.Close();                fs = File.Create(zipedFile);                zipStream = new ZipOutputStream(fs);                if (!string.IsNullOrEmpty(password)) zipStream.Password = password;                ent = new ZipEntry(Path.GetFileName(fileToZip));                zipStream.PutNextEntry(ent);                zipStream.SetLevel(6);                zipStream.Write(buffer, 0, buffer.Length);            }            catch            {                result = false;            }            finally            {                if (zipStream != null)                {                    zipStream.Finish();                    zipStream.Close();                }                if (ent != null)                {                    ent = null;                }                if (fs != null)                {                    fs.Close();                    fs.Dispose();                }            }            GC.Collect();            GC.Collect(1);            return result;        }        /// <summary>           /// 压缩文件           /// </summary>           /// <param name="fileToZip">要压缩的文件全名</param>           /// <param name="zipedFile">压缩后的文件名</param>           /// <returns>压缩结果</returns>           public static bool ZipFile(string fileToZip, string zipedFile)        {            bool result = ZipFile(fileToZip, zipedFile, null);            return result;        }        /// <summary>           /// 压缩文件或文件夹           /// </summary>           /// <param name="fileToZip">要压缩的路径</param>           /// <param name="zipedFile">压缩后的文件名</param>           /// <param name="password">密码</param>           /// <returns>压缩结果</returns>           public static bool Zip(string fileToZip, string zipedFile, string password)        {            bool result = false;            if (Directory.Exists(fileToZip))                result = ZipDirectory(fileToZip, zipedFile, password);            else if (File.Exists(fileToZip))                result = ZipFile(fileToZip, zipedFile, password);            return result;        }        /// <summary>           /// 压缩文件或文件夹           /// </summary>           /// <param name="fileToZip">要压缩的路径</param>           /// <param name="zipedFile">压缩后的文件名</param>           /// <returns>压缩结果</returns>           public static bool Zip(string fileToZip, string zipedFile)        {            bool result = Zip(fileToZip, zipedFile, null);            return result;        }        #endregion        #region 解压        /// <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)// , out string err          {            // 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.ToLower())))                {                    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    }}
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