压缩/解压文件

引用的dll:ICSharpCode.SharpZipLib.dll

压缩

  static void Main(string[] args)
        {
            string ZipPath = @"D:TESTConsoleApp3ConsoleApp3inDebug2";
            string dzhjZipPath = Path.Combine(ZipPath, string.Format("{0:yyyyMMddHHmmss}", DateTime.Now) + ".zip");
            //WriteFile(ZipPath);//往文件夹里面放文件
            ZipFloClass zc = new ZipFloClass();
            zc.ZipFile(ZipPath, dzhjZipPath);
        }

帮助类

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

namespace ConsoleApp3
{
    public class ZipFloClass
    {
        public void ZipFile(string strFile, string strZip)
        {
            if (strFile[strFile.Length - 1] != Path.DirectorySeparatorChar)
                strFile += Path.DirectorySeparatorChar;
            ZipOutputStream s = new ZipOutputStream(File.Create(strZip));
            s.SetLevel(6); // 0 - store only to 9 - means best compression   
            zip(strFile, s, strFile, strZip);
            s.Finish();
            s.Close();
        }


        private void zip(string strFile, ZipOutputStream s, string staticFile, string strZip)
        {
            if (strFile[strFile.Length - 1] != Path.DirectorySeparatorChar) strFile += Path.DirectorySeparatorChar;
            Crc32 crc = new Crc32();
            string[] filenames = Directory.GetFileSystemEntries(strFile);
            FileStream fs = null;
            ZipEntry entry = null;
            foreach (string file in filenames)
            {

                if (Directory.Exists(file))
                {
                    zip(file, s, staticFile, strZip);
                }
                else if (file == strZip)
                {
                    continue;
                }
                else // 否则直接压缩文件   
                {
                    //打开压缩文件  
                    FileInfo fi = new FileInfo(file);
                    fs = fi.OpenRead();
                    byte[] buffer = new byte[fs.Length];
                    fs.Read(buffer, 0, buffer.Length);
                    string tempfile = file.Substring(staticFile.LastIndexOf("\") + 1);
                    entry = new ZipEntry(tempfile);
                    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);
                }
            }
        }
    }
}

 解压

 static void Main(string[] args)
        {
            UnZipFloClass ufc = new UnZipFloClass();
            string dzZip = @"D:TESTConsoleApp3ConsoleApp3inDebug220200410142512.zip";
            string ZipPath = @"D:TESTConsoleApp3ConsoleApp3inDebug2";
            ufc.unZipFile(dzZip, ZipPath + "\新建");//新建这个文件夹不需要存在，解压时会判断没有会自动生成,存在则会删除掉，在重新生成

        }

帮助类

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

namespace ConsoleApp3
{
    public class UnZipFloClass
    {
        public string unZipFile(string TargetFile, string fileDir)
        {
            string rootFile = " ";
            try
            {
                //读取压缩文件(zip文件)，准备解压缩   
                ZipInputStream s = new ZipInputStream(File.OpenRead(TargetFile.Trim()));
                ZipEntry theEntry;
                string path = fileDir;
                //解压出来的文件保存的路径   

                string rootDir = " ";
                //根目录下的第一个子文件夹的名称   
                while ((theEntry = s.GetNextEntry()) != null)
                {
                    rootDir = Path.GetDirectoryName(theEntry.Name);
                    //得到根目录下的第一级子文件夹的名称   
                    if (rootDir.IndexOf("\") >= 0)
                    {
                        rootDir = rootDir.Substring(0, rootDir.IndexOf("\") + 1);
                    }
                    string dir = Path.GetDirectoryName(theEntry.Name);
                    //根目录下的第一级子文件夹的下的文件夹的名称   
                    string fileName = Path.GetFileName(theEntry.Name);
                    //根目录下的文件名称   
                    if (dir != " ")
                    //创建根目录下的子文件夹,不限制级别   
                    {
                        if (!Directory.Exists(fileDir + "\" + dir))
                        {
                            path = fileDir + "\" + dir;
                            //在指定的路径创建文件夹   
                            Directory.CreateDirectory(path);
                        }
                    }
                    else if (dir == " " && fileName != "")
                    //根目录下的文件   
                    {
                        path = fileDir;
                        rootFile = fileName;
                    }
                    else if (dir != " " && fileName != "")
                    //根目录下的第一级子文件夹下的文件   
                    {
                        if (dir.IndexOf("\") > 0)
                        //指定文件保存的路径   
                        {
                            path = fileDir + "\" + dir;
                        }
                    }

                    if (dir == rootDir)
                    //判断是不是需要保存在根目录下的文件   
                    {
                        path = fileDir + "\" + rootDir;
                    }

                    //以下为解压缩zip文件的基本步骤   
                    //基本思路就是遍历压缩文件里的所有文件，创建一个相同的文件。   
                    if (fileName != String.Empty)
                    {
                        FileStream streamWriter = File.Create(path + "\" + 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();

                return rootFile;
            }
            catch (Exception ex)
            {
                return "1; " + ex.Message;
            }
        }
    }
}