过程说明都在注释里，我们直接来看代码：
压缩：

using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.IO;using ICSharpCode.SharpZipLib.Zip;using System.Diagnostics;public class winrar{ #region 压缩文件 /// <summary> /// 压缩文件 /// </summary> /// <param name="filesPath">压缩文件及完整路径(D:\abc)</param> /// <param name="zipFilePath">压缩包所存完整路径(D:\a.zip或d:\a.rar)</param> public static void CreateZipFile(string filesPath, string zipFilePath) { if (!Directory.Exists(filesPath)) { Console.WriteLine("Cannot find directory '{0}'", filesPath); return; } try { string[] filenames = Directory.GetFiles(filesPath); using (ZipOutputStream s = new ZipOutputStream(File.Create(zipFilePath))) { s.SetLevel(9); // 压缩级别 0-9 //s.Password = "123"; //Zip压缩文件密码 byte[] buffer = new byte[4096]; //缓冲区大小 foreach (string file in filenames) { ZipEntry entry = new ZipEntry(Path.GetFileName(file)); entry.DateTime = DateTime.Now; s.PutNextEntry(entry); using (FileStream fs = File.OpenRead(file)) { int sourceBytes; do { sourceBytes = fs.Read(buffer, 0, buffer.Length); s.Write(buffer, 0, sourceBytes); } while (sourceBytes > 0); } } s.Finish(); s.Close(); } } catch (Exception ex) { AutoCompare.ErrorLog.SaveError(ex, "压缩文件出错！"); } } #endregion #region 解压文件 /// <summary> /// 解压文件 /// </summary> /// <param name="zipFilePath">解压文件及完整路径(d:\a.zip或d:\a.rar)</param> public static void UnZipFile(string zipFilePath) { if (!File.Exists(zipFilePath)) { Console.WriteLine("Cannot find file '{0}'", zipFilePath); return; } using (ZipInputStream s = new ZipInputStream(File.OpenRead(zipFilePath))) { ZipEntry theEntry; while ((theEntry = s.GetNextEntry()) != null) { Console.WriteLine(theEntry.Name); string directoryName = Path.GetDirectoryName(theEntry.Name); string fileName = Path.GetFileName(theEntry.Name); // create directory if (directoryName.Length > 0) { Directory.CreateDirectory(directoryName); } if (fileName != String.Empty) { using (FileStream streamWriter = File.Create(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; } } } } } } } #endregion

string rarFile=@"C:\Program Files\WinRAR\WinRAR.exe";//winrar之所在的路径，这里找执行文件所在文件夹和"C:\Program Files\WinRAR\WinRAR.exe

#region RAR压缩文件（支持路径中含有空格） /// <summary> /// 压缩到.rar /// </summary> /// <param name="intputPath">输入目录</param> /// <param name="outputPath">输出目录</param> /// <param name="outputFileName">输出文件名</param> public static void CompressRar(string intputPath, string outputPath, string outputFileName) { //rar 执行时的命令、参数 string rarCmd; //启动进程的参数 ProcessStartInfo processStartInfo; //进程对象 Process process; //命令参数 rarCmd = " a " + outputFileName + " " + intputPath + " -r -ep1"; //rar路径 string rarFile = System.Windows.Forms.Application.StartupPath + @"\rar.exe"; if (outputPath.IndexOf(' ') > 0 || intputPath.IndexOf(' ') > 0) { rarCmd = " a " + outputFileName + " \"" + intputPath + "\" -r -ep1"; } if (!File.Exists(System.Windows.Forms.Application.StartupPath + @"\rar.exe")) { rarFile=@"C:\Program Files\WinRAR\WinRAR.exe"; } try { //判断输入目录是否存在 if (!Directory.Exists(intputPath)) { throw new ArgumentException("CompressRar'arge : inputPath isn't exsit."); } //创建启动进程的参数 processStartInfo = new ProcessStartInfo(); //指定启动文件名 processStartInfo.FileName = @"C:\Program Files\WinRAR\WinRAR.exe"; //指定启动该文件时的命令、参数 processStartInfo.Arguments = rarCmd; //指定启动窗口模式：隐藏 processStartInfo.WindowStyle = ProcessWindowStyle.Hidden; //指定压缩后到达路径 processStartInfo.WorkingDirectory = outputPath; //创建进程对象 process = new Process(); //指定进程对象启动信息对象 process.StartInfo = processStartInfo; //启动进程 process.Start(); //指定进程自行退行为止 process.WaitForExit(); } catch (Exception ex) { throw ex; } } #endregion #region RAR解压文件（支持路径中含有空格） /// <summary> /// 解压文件 /// </summary> /// <param name="outputPath">解压到的路径</param> /// <param name="inputPath">压缩包所在路径（解压路径需存在）</param> /// <param name="inputFileName">压缩包名</param> /// <returns></returns> public static void DecompressRar(string outputPath, string inputPath, string inputFileName) { //rar 执行时的命令、参数 string rarCmd; //启动进程的参数 ProcessStartInfo processStartInfo; //进程对象 Process process; //rar路径 string rarFile =System.Windows.Forms.Application.StartupPath + @"\rar.exe" ; //命令参数 rarCmd = " e " + inputFileName + " " + outputPath + " -r -ep1"; if (outputPath.IndexOf(' ') > 0 || inputPath.IndexOf(' ') > 0) { rarCmd = "x -inul -y -o+ -ep1 \"" + inputPath + "\\" + inputFileName + "\" \"" + outputPath+"\""; } if (!File.Exists(System.Windows.Forms.Application.StartupPath + @"\rar.exe")) { rarFile=@"C:\Program Files\WinRAR\WinRAR.exe"; } try { //创建启动进程的参数 processStartInfo = new ProcessStartInfo(); //指定启动文件名 processStartInfo.FileName = rarFile; //指定启动该文件时的命令、参数 processStartInfo.Arguments = rarCmd; //指定启动窗口模式：隐藏 processStartInfo.WindowStyle = ProcessWindowStyle.Hidden; //指定解压后到达路径（文件夹需要存在） processStartInfo.WorkingDirectory = inputPath; //创建进程对象 process = new Process(); //指定进程对象启动信息对象 process.StartInfo = processStartInfo; //启动进程 process.Start(); //指定进程自行退行为止 process.WaitForExit(); //释放资源 process.Close(); } catch (Exception ex) { throw ex; } } #endregion}

解压：

class UseWinRar { private string rarExeFile = null;//WinRar.exe路径 private bool useAble = false;//标志WinRar是否可用 public UseWinRar()//构造方法 { rarExeFile = getRarExe(); useAble = !string.IsNullOrEmpty(rarExeFile);//如果WinRar.exe路径不为空，说明可用 } public static string getRarExe()//获取WinRar所在磁盘路径 { string rarExe = null; RegistryKey regKey = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\WinRAR.exe"); if (regKey == null) { return null; } rarExe = regKey.GetValue("").ToString(); regKey.Close();//关闭注册表 return rarExe; } public bool exeRarCmd(string cmd)//执行某个命令 { if (!useAble) { return false; } Process process = new Process();//新建一个过程 ProcessStartInfo startInfo = new ProcessStartInfo(rarExeFile);//新建一个启动信息 startInfo.Arguments = cmd;//设置启动信息的执行参数 //startInfo.WorkingDirectory = workDirectory;//设置启动信息的工作目录 startInfo.WindowStyle = ProcessWindowStyle.Hidden;//设置程序后台运行 process.StartInfo = startInfo;//设置过程的启动信息 process.Start();//开始过程 return true; } public bool unZipAll(string zipFile, string targetDirectory)//将指定压缩文件解压到指定目录 { if (! File.Exists(zipFile)) { return false; } string zipCmd = "x " + zipFile +" "+ targetDirectory + " -y -ibck";//后台解压压缩文件中全部文件到指定目录 exeRarCmd(zipCmd);//执行解压操作 return true; } public bool unZipToCurrentDirectory(string zipFile)//将压缩文件解压到当前目录 { if (!File.Exists(zipFile)) { return false; } FileInfo fileInfo = new FileInfo(zipFile); return unZipAll(zipFile, fileInfo.DirectoryName); } } Main:public static void Main() { UseWinRar rar = new UseWinRar(); string[] zipFiles = Directory.GetFiles(Environment.CurrentDirectory, "*.zip");//获取所有zip文件路径 foreach (string zipFile in zipFiles) { rar.unZipToCurrentDirectory(zipFile); } }