C# 使用SharpZipLib生成压缩包的实例代码

using ICSharpCode.SharpZipLib.Checksum;
using ICSharpCode.SharpZipLib.Zip;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace DemoZip
{
  class ZipHelper
  {
    private string rootPath = string.Empty;
    #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 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
      {
        string entName = folderToZip.Replace(this.rootPath, string.Empty)+"/";
        //Path.Combine(parentFolderName, Path.GetFileName(folderToZip) + "/")
        ent = new ZipEntry(entName);
        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(entName + 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 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 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 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 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 bool Zip(string fileToZip, string zipedFile, string password)
    {
      bool result = false;
      if (Directory.Exists(fileToZip))
      {
        this.rootPath = Path.GetDirectoryName(fileToZip);
        result = ZipDirectory(fileToZip, zipedFile, password);
      }
      else if (File.Exists(fileToZip))
      {
        this.rootPath = Path.GetDirectoryName(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 bool Zip(string fileToZip, string zipedFile)
    {
      bool result = Zip(fileToZip, zipedFile, null);
      return result;
    }
    #endregion
    #region 解压 
    /// <summary>  
    /// 解压功能(解压压缩文件到指定目录)  
    /// </summary>  
    /// <param name="fileToUnZip">待解压的文件</param>  
    /// <param name="zipedFolder">指定解压目标目录</param>  
    /// <param name="password">密码</param>  
    /// <returns>解压结果</returns>  
    public bool UnZip(string fileToUnZip, string zipedFolder, string password)
    {
      bool result = true;
      FileStream fs = null;
      ZipInputStream zipStream = null;
      ZipEntry ent = null;
      string fileName;
      if (!File.Exists(fileToUnZip))
        return false;
      if (!Directory.Exists(zipedFolder))
        Directory.CreateDirectory(zipedFolder);
      try
      {
        zipStream = new ZipInputStream(File.OpenRead(fileToUnZip));
        if (!string.IsNullOrEmpty(password)) zipStream.Password = password;
        while ((ent = zipStream.GetNextEntry()) != null)
        {
          if (!string.IsNullOrEmpty(ent.Name))
          {
            fileName = Path.Combine(zipedFolder, ent.Name);
            fileName = fileName.Replace('/', '\\');//change by Mr.HopeGi  
            if (fileName.EndsWith("\\"))
            {
              Directory.CreateDirectory(fileName);
              continue;
            }
            fs = File.Create(fileName);
            int size = 2048;
            byte[] data = new byte[size];
            while (true)
            {
              size = zipStream.Read(data, 0, data.Length);
              if (size > 0)
                fs.Write(data, 0, data.Length);
              else
                break;
            }
          }
        }
      }
      catch
      {
        result = false;
      }
      finally
      {
        if (fs != null)
        {
          fs.Close();
          fs.Dispose();
        }
        if (zipStream != null)
        {
          zipStream.Close();
          zipStream.Dispose();
        }
        if (ent != null)
        {
          ent = null;
        }
        GC.Collect();
        GC.Collect(1);
      }
      return result;
    }
    /// <summary>  
    /// 解压功能(解压压缩文件到指定目录)  
    /// </summary>  
    /// <param name="fileToUnZip">待解压的文件</param>  
    /// <param name="zipedFolder">指定解压目标目录</param>  
    /// <returns>解压结果</returns>  
    public bool UnZip(string fileToUnZip, string zipedFolder)
    {
      bool result = UnZip(fileToUnZip, zipedFolder, null);
      return result;
    }
    #endregion
  }
}