ICSharpCode.SharpZipLib 实现文件压缩功能,可以压缩空文件夹

为了方便下载,对文件进行打包压缩,今天实现了一个在线压缩功能,借助了 ICSharpCode.SharpZipLib 控件进行的操作,别的不多说,代码贴出来!

 

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

    public class ZipFileHelper
    {



        /// <summary>  
        ///   
        /// 利用 ICSharpCode.SharpZipLib（0.85.5.452）进行压缩与解压缩的帮助类  
        ///   
        /// <example>  
        /// 使用方法如下：  
        /// 压缩：  
        /// SharpZipHelper.ZipFile 

 
        ///         (  
        ///         "C:\\test\\",  
        ///         new string[] {   
        ///             "bin\\ICSharpCode.SharpZipLib.dll",   
        ///             "bin\\ICSharpCode.SharpZipLib.pdb",   
        ///             "bin\\ICSharpCode.SharpZipLib.xml",   
        ///             "bin\\ziplist.exe",   
        ///             "bin\\ziplist.vshost.exe",   
        ///             "bin\\ziplist.pdb"   
        ///         },   
        ///         "test.zip",   
        ///         9,   
        ///         "chinull",  
        ///         "测试压缩程序"  
        ///         );  
        /// 解压缩：  
        /// SharpZipHelper.UnZipFile("test.zip", "C:\\bin0\\", "chinull");  
        /// </example>  
        /// </summary>  

        /// <summary>  
        /// 压缩指定文件生成ZIP文件  
        /// </summary>  
        /// <param name="topDirName">顶层文件夹名称</param>  
        /// <param name="fileNamesToZip">待压缩文件列表</param>  
        /// <param name="ZipedFileName">ZIP文件</param>  
        /// <param name="CompressionLevel">压缩比</param>  
        /// <param name="password">密码</param>  
        /// <param name="comment">压缩文件注释文字</param>  
        public static void ZipFile(string topDirName,string[] fileNamesToZip,string ZipedFileName,int CompressionLevel, string password,string comment)
        {
            ZipOutputStream s = new ZipOutputStream(System.IO.File.Open(ZipedFileName, FileMode.Create));
            if (password != null && password.Length > 0)
                s.Password = password;
            if (comment != null && comment.Length > 0)
                s.SetComment(comment);
            s.SetLevel(CompressionLevel); // 0 - means store only to 9 - means best compression  

            foreach (string file in fileNamesToZip)
            {
                

                if (file.EndsWith("\\")) //如果是文件夹 folder
                {
                    
                    ZipEntry entry = new ZipEntry(file);
                    entry.DateTime = DateTime.Now;
                    s.PutNextEntry(entry);
                }
                else  //文件
                {

                    FileStream fs = File.OpenRead(topDirName + file);    //打开待压缩文件  
                    byte[] buffer = new byte[fs.Length];
                    fs.Read(buffer, 0, buffer.Length);      //读取文件流  
                    ZipEntry entry = new ZipEntry(file);    //新建实例  

                    entry.DateTime = DateTime.Now;

                    entry.Size = fs.Length;
                    fs.Close();

                    s.PutNextEntry(entry);
                    s.Write(buffer, 0, buffer.Length);
                }
            }
            s.Finish();
            s.Close();
        }

        /// <summary>  
        /// 解压缩ZIP文件到指定文件夹  
        /// </summary>  
        /// <param name="zipfileName">ZIP文件</param>  
        /// <param name="UnZipDir">解压文件夹</param>  
        /// <param name="password">压缩文件密码</param>  
        public static void UnZipFile(string zipfileName, string UnZipDir, string password)
        {
            ZipInputStream s = new ZipInputStream(File.OpenRead(zipfileName));
            if (password != null && password.Length > 0)
                s.Password = password;
            try
            {
                ZipEntry theEntry;
                while ((theEntry = s.GetNextEntry()) != null)
                {
                    string directoryName = Path.GetDirectoryName(UnZipDir);
                    string pathname = Path.GetDirectoryName(theEntry.Name);
                    string fileName = Path.GetFileName(theEntry.Name);

                    //生成解压目录   
                    pathname = pathname.Replace(":", "$");//处理压缩时带有盘符的问题  
                    directoryName = directoryName + "\\" + pathname;
                    Directory.CreateDirectory(directoryName);

                    if (fileName != String.Empty)
                    {
                        //解压文件到指定的目录  
                        FileStream streamWriter = File.Create(directoryName + "\\" + 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();
            }
            catch (Exception eu)
            {
                throw eu;
            }
            finally
            {
                s.Close();
            }

        }
    }

这里是调用

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.IO;

public partial class Admin_Zip_Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            
        }
    }
    
   
   
       /// <summary>
    /// 压缩
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void Button1_Click(object sender, EventArgs e)
    {
        string p = Server.MapPath("~") + "\\";
        IList<string> list = new List<string>();
        GetFileInfo(p, p, list);
        ZipFileHelper.ZipFile(p, list.ToArray(), "testInfo1.zip", 8, null, null);
    }

    /// <summary>
    /// 解压缩
    /// </summary>
    /// <param name="sender"></param>
    /// <param name="e"></param>
    protected void Button2_Click(object sender, EventArgs e)
    {
        string p = Server.MapPath("~");

        ZipFileHelper.UnZipFile("testInfo1.zip", p, null);
    }





   /// <summary>
   /// 获取文件夹下的所有的文件及文件夹
   /// </summary>
   /// <param name="p">当前目录</param>
   /// <param name="cutStr">要替换的物理路径</param>
   /// <param name="list">所有的文件及文件夹组成的集合</param>
    public void GetFileInfo(string p,string cutStr,IList<string> list)
    {
        //目录
      DirectoryInfo di = new DirectoryInfo(p);

        //目录下的文件
      FileInfo[] file = di.GetFiles();
      //当前目录下的所有目录
      DirectoryInfo[] dr = di.GetDirectories("*");
      if (file.Length==0&&dr.Length==0)
      {
          list.Add(di.FullName.Replace(cutStr, "")+"\\");
      }
        //把文件添加到list中
      foreach (FileInfo strFile in file)
      {
          //格式为目录+文件名
          string fullname = strFile.FullName.Replace(cutStr, "");
          list.Add(fullname);

      }
     
        
        //遍历当前文件夹,如果还有下一级文件夹,则递归调用遍历下一级目录文件夹
      foreach (DirectoryInfo d in dr)
      {
          GetFileInfo(d.FullName, cutStr, list);
      }
     

    }


}