C＃利用SharpZipLib解压或压缩文件(支持多层目录递归压缩)

需要下载ICSharpCode.SharpZipLib.dll

 using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Text;
 using System.Threading.Tasks;

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

 namespace ZYOfficeWrap
 {

     /// <summary>
     /// 压缩文件格式
     /// </summary>

     public enum fileType
     {
         Zip = ,
         RAR = ,
         Tar =
     }
     /// <summary>
     /// 文件解压缩操作类库
     /// </summary>
     public class FileZipOpr
     {
         /// <summary>
         /// 构造函数
         /// </summary>
         public FileZipOpr()
         {

         }

         /// <summary>
         /// 压缩单个文件
         /// </summary>
         /// <param name="fileToZip">要压缩的文件</param>
         /// <param name="zipedFile">压缩后的文件</param>
         /// <param name="compressionLevel">压缩等级</param>
         /// <param name="blockSize">每次写入大小</param>
         public  void ZipFile(string fileToZip, string zipedFile, int compressionLevel, int blockSize)
         {
             //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!");
             }

             using (FileStream ZipFile = File.Create(zipedFile))
             {
                 using (ZipOutputStream ZipStream = new ZipOutputStream(ZipFile))
                 {
                     using (FileStream StreamToZip = new FileStream(fileToZip, FileMode.Open, FileAccess.Read))
                     {
                         string fileName = fileToZip.Substring(fileToZip.LastIndexOf("\\") + );
                         ZipEntry ZipEntry = new ZipEntry(fileName);
                         ZipStream.PutNextEntry(ZipEntry);
                         ZipStream.SetLevel(compressionLevel);
                         byte[] buffer = new byte[blockSize];
                         int sizeRead = ;
                         try
                         {
                             do
                             {
                                 sizeRead = StreamToZip.Read(buffer, , buffer.Length);
                                 ZipStream.Write(buffer, , sizeRead);
                             }
                             while (sizeRead > );
                         }
                         catch (System.Exception ex)
                         {
                             throw ex;
                         }
                         StreamToZip.Close();
                     }

                     ZipStream.Finish();
                     ZipStream.Close();
                 }
                 ZipFile.Close();
             }
         }

         /// <summary>
         /// 压缩单个文件
         /// </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>
         public  void 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!");
             }

             using (FileStream fs = File.OpenRead(fileToZip))
             {
                 byte[] buffer = new byte[fs.Length];
                 fs.Read(buffer, , buffer.Length);
                 fs.Close();

                 using (FileStream ZipFile = File.Create(zipedFile))
                 {
                     using (ZipOutputStream ZipStream = new ZipOutputStream(ZipFile))
                     {
                         string fileName = fileToZip.Substring(fileToZip.LastIndexOf("\\") + );
                         ZipEntry ZipEntry = new ZipEntry(fileName);
                         ZipStream.PutNextEntry(ZipEntry);
                         ZipStream.SetLevel();

                         ZipStream.Write(buffer, , buffer.Length);
                         ZipStream.Finish();
                         ZipStream.Close();
                     }
                 }
             }
         }

         /// <summary>
         /// 压缩多层目录
         /// </summary>
         /// <param name="strDirectory">要进行压缩的文件夹</param>
         /// <param name="zipedFile">压缩后生成的压缩文件名</param>
         public  void ZipFileDirectory(string strDirectory, string zipedFile)
         {
             using (System.IO.FileStream ZipFile = System.IO.File.Create(zipedFile))
             {
                 using (ZipOutputStream s = new ZipOutputStream(ZipFile))
                 {
                     ZipSetp(strDirectory, s, "");
                 }
             }
         }

         /// <summary>
         /// 递归遍历目录
         /// </summary>
         /// <param name="strDirectory">文件夹名称</param>
         /// <param name="s">The ZipOutputStream Object.</param>
         /// <param name="parentPath"></param>
         private static void ZipSetp(string strDirectory, ZipOutputStream s, string parentPath)
         {
             if (strDirectory[strDirectory.Length - ] != Path.DirectorySeparatorChar)
             {
                 strDirectory += Path.DirectorySeparatorChar;
             }
             Crc32 crc = new Crc32();

             string[] filenames = Directory.GetFileSystemEntries(strDirectory);

             foreach (string file in filenames)// 遍历所有的文件和目录
             {

                 if (Directory.Exists(file))// 先当作目录处理如果存在这个目录就递归Copy该目录下面的文件
                 {
                     string pPath = parentPath;
                     pPath += file.Substring(file.LastIndexOf("\\") + );
                     pPath += "\\";
                     ZipSetp(file, s, pPath);
                 }

                 else // 否则直接压缩文件
                 {
                     //打开压缩文件
                     using (FileStream fs = File.OpenRead(file))
                     {

                         byte[] buffer = new byte[fs.Length];
                         fs.Read(buffer, , buffer.Length);

                         string fileName = parentPath + file.Substring(file.LastIndexOf("\\") + );
                         ZipEntry entry = new ZipEntry(fileName);

                         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, , buffer.Length);
                     }
                 }
             }
         }

         /// <summary>
         /// 解压缩一个 zip 文件。
         /// </summary>
         /// <param name="zipedFile">The ziped file.</param>
         /// <param name="strDirectory">The STR directory.</param>
         /// <param name="password">zip 文件的密码。</param>
         /// <param name="overWrite">是否覆盖已存在的文件。</param>
         public void UnZipFile(string zipedFile, string strDirectory, string password, bool overWrite)
         {

             if (strDirectory == "")
                 strDirectory = Directory.GetCurrentDirectory();
             if (!strDirectory.EndsWith("\\"))
                 strDirectory = strDirectory + "\\";

             using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipedFile)))
             {
                 s.Password = password;
                 ZipEntry theEntry;

                 while ((theEntry = s.GetNextEntry()) != null)
                 {
                     string directoryName = "";
                     string pathToZip = "";
                     pathToZip = theEntry.Name;

                     if (pathToZip != "")
                         directoryName = Path.GetDirectoryName(pathToZip) + "\\";

                     string fileName = Path.GetFileName(pathToZip);

                     Directory.CreateDirectory(strDirectory + directoryName);

                     if (fileName != "")
                     {
                         if ((File.Exists(strDirectory + directoryName + fileName) && overWrite) || (!File.Exists(strDirectory + directoryName + fileName)))
                         {
                             using (FileStream streamWriter = File.Create(strDirectory + directoryName + fileName))
                             {
                                 int size = ;
                                 byte[] data = new byte[];
                                 while (true)
                                 {
                                     size = s.Read(data, , data.Length);

                                     if (size > )
                                         streamWriter.Write(data, , size);
                                     else
                                         break;
                                 }
                                 streamWriter.Close();
                             }
                         }
                     }
                 }

                 s.Close();
             }
         }

     }
 }