C#壓縮解壓協助類

using System;  using System.Collections.Generic;  using System.IO;  using System.Linq;  using System.Web;  using ICSharpCode.SharpZipLib.Zip;     namespace GzRMIS.Main.Business  {      public class ZipHelper      {          ///           /// 存放待壓縮的檔案的絕對路徑          ///           private List AbsolutePaths { set; get; }          public string errorMsg { set; get; }             public ZipHelper()          {              errorMsg = "";              AbsolutePaths = new List();          }          ///           /// 添加壓縮檔或檔案夾          ///           /// 檔案或檔案夾的絕對路徑          public void AddFile(string _fileAbsolutePath)          {              AbsolutePaths.Add(_fileAbsolutePath);          }          ///           /// 壓縮檔或者檔案夾          ///           /// 壓縮後檔案的存放路徑   如C:\\windows\abc.zip          ///  壓縮層級0~9，數字越大壓縮率越高，預設為5          ///           public bool CompressionZip(string _depositPath,int _Level=5)          {              bool result = true;              FileStream fs = null;              try             {                  ZipOutputStream ComStream = new ZipOutputStream(File.Create(_depositPath));                  ComStream.SetLevel(_Level);      //壓縮等級                  foreach (string path in AbsolutePaths)                  {                      //如果是目錄                      if (Directory.Exists(path))                      {                          ZipFloder(path, ComStream, path);                      }                      else if (File.Exists(path))//如果是檔案                      {                          fs = File.OpenRead(path);                          byte[] bts = new byte[fs.Length];                          fs.Read(bts, 0, bts.Length);                          ZipEntry ze = new ZipEntry(new FileInfo(path).Name);                          ComStream.PutNextEntry(ze);             //為壓縮檔流提供一個容器                          ComStream.Write(bts, 0, bts.Length);  //寫入位元組                      }                  }                  ComStream.Finish(); // 結束壓縮                  ComStream.Close();              }              catch (Exception ex)              {                  if (fs != null)                  {                      fs.Close();                  }                  errorMsg = ex.Message;                  result = false;              }              return result;          }          //壓縮檔夾          private void ZipFloder(string _OfloderPath, ZipOutputStream zos, string _floderPath)          {              foreach (FileSystemInfo item in new DirectoryInfo(_floderPath).GetFileSystemInfos())              {                  if (Directory.Exists(item.FullName))                  {                      ZipFloder(_OfloderPath, zos, item.FullName);                  }                  else if (File.Exists(item.FullName))//如果是檔案                  {                      DirectoryInfo ODir = new DirectoryInfo(_OfloderPath);                      string fullName2 = new FileInfo(item.FullName).FullName;                      string path = ODir.Name + fullName2.Substring(ODir.FullName.Length, fullName2.Length - ODir.FullName.Length);//擷取相對目錄                      FileStream fs = File.OpenRead(fullName2);                      byte[] bts = new byte[fs.Length];                      fs.Read(bts, 0, bts.Length);                      ZipEntry ze = new ZipEntry(path);                      zos.PutNextEntry(ze);             //為壓縮檔流提供一個容器                      zos.Write(bts, 0, bts.Length);  //寫入位元組                  }              }          }          ///           /// 解壓          ///           /// 壓縮檔路徑          /// 解壓的路徑          ///           public bool DeCompressionZip(string _depositPath, string _floderPath)          {              bool result = true;              FileStream fs = null;              try             {                  ZipInputStream InpStream = new ZipInputStream(File.OpenRead(_depositPath));                  ZipEntry ze = InpStream.GetNextEntry();//擷取壓縮檔中的每一個檔案                  Directory.CreateDirectory(_floderPath);//建立解壓檔案夾                  while (ze != null)//如果解壓完ze則是null                  {                      if (ze.IsFile)//壓縮zipINputStream裡面存的都是檔案。帶檔案夾的檔案名稱字是檔案夾\\檔案名稱                      {                          string[] strs = ze.Name.Split('\\');//如果檔案名稱中包含’\\‘則表明有檔案夾                          if (strs.Length > 1)                          {                              //兩層迴圈用於一層一層建立檔案夾                              for (int i = 0; i < strs.Length - 1; i++)                              {                                  string floderPath = _floderPath;                                  for (int j = 0; j < i; j++)                                  {                                      floderPath = floderPath + "\\" + strs[j];                                  }                                  floderPath = floderPath + "\\" + strs[i];                                  Directory.CreateDirectory(floderPath);                              }                          }                          fs = new FileStream(_floderPath + "\\" + ze.Name, FileMode.OpenOrCreate, FileAccess.Write);//建立檔案                          //迴圈讀取檔案到檔案流中                          while (true)                          {                              byte[] bts = new byte[1024];                              int i = InpStream.Read(bts, 0, bts.Length);                              if (i > 0)                              {                                  fs.Write(bts, 0, i);                              }                              else                             {                                  fs.Flush();                                  fs.Close();                                  break;                              }                          }                      }                      ze = InpStream.GetNextEntry();                  }              }              catch (Exception ex)              {                  if (fs != null)                  {                      fs.Close();                  }                  errorMsg = ex.Message;                  result = false;              }              return result;          }         }  }

