asp.net中實現檔案壓縮及解壓代碼

代碼如下

複製代碼

using System;  using System.IO;  using ICSharpCode.SharpZipLib.Checksums;  using ICSharpCode.SharpZipLib.Zip;  using ICSharpCode.SharpZipLib.GZip;    namespace ZipFile  {      /// <summary>      /// 壓縮檔      /// </summary>      public class ZipHelp      {          public string ZipName { get; set; }          /// <summary>          /// 壓縮檔夾          /// </summary>          /// <param name="zipSourcePath">需要壓縮的檔案夾路徑（全路徑）</param>          /// <param name="zipToFilePath">壓縮後儲存的路徑且必須帶尾碼名如：D:\aa.zip（如果為空白字元則預設儲存到同級檔案夾名稱為源檔案名稱）</param>          public void ZipFileMain(string zipSourcePath,string zipToFilePath)          {              string[] filenames = Directory.GetFiles(zipSourcePath);              ZipName = zipSourcePath.Substring(zipSourcePath.LastIndexOf("\")+1);              //定義壓縮更目錄對象              Crc32 crc = new Crc32();              ZipOutputStream s = new ZipOutputStream(File.Create(zipToFilePath.Equals("")? zipSourcePath+".zip":zipToFilePath));                s.SetLevel(6); // 設定壓縮層級              //遞迴壓縮檔夾下的所有檔案和字檔案夾              AddDirToDir(crc, s,zipSourcePath);                s.Finish();              s.Close();          }          /// <summary>          /// 壓縮單個檔案          /// </summary>          /// <param name="zipSourcePath">需要壓縮的檔案路徑(全路徑)</param>          /// <param name="zipToFilePath">壓縮後儲存的檔案路徑（如果是Null 字元則預設壓縮到同目錄下檔案名稱為源檔案名稱）</param>          public void ZipByFile(string zipSourcePath,string zipToFilePath)          {              //定義壓縮更目錄對象              Crc32 crc = new Crc32();              string dirName = zipSourcePath.Substring(zipSourcePath.LastIndexOf("\") + 1, zipSourcePath.LastIndexOf(".") - (zipSourcePath.LastIndexOf("\") + 1)) + ".zip";              ZipOutputStream s = new ZipOutputStream(File.Create(zipToFilePath.Equals("")? zipSourcePath.Substring(0,zipSourcePath.LastIndexOf("\"))+"\"+ dirName:zipToFilePath));              s.SetLevel(6); // 設定壓縮層級              AddFileToDir(crc,s,zipSourcePath,0);              s.Finish();              s.Close();          }          /// <summary>          /// 壓縮單個檔案到指定壓縮檔夾下(內部調用)          /// </summary>          /// <param name="crc"></param>          /// <param name="s"></param>          /// <param name="file">檔案路徑</param>          public void AddFileToDir(Crc32 crc,ZipOutputStream s,string file,int dotype)          {              FileStream fs = File.OpenRead(file);              byte[] buffer = new byte[fs.Length];              fs.Read(buffer, 0, buffer.Length);              string filename="";              if (dotype == 0)                  filename = file.Substring(file.LastIndexOf("\") + 1);              else                  filename = file.Substring(file.IndexOf(ZipName));              ZipEntry entry = new ZipEntry(filename);              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);          }          /// <summary>          /// 遞迴檔案夾層級（內部調用）          /// </summary>          /// <param name="crc"></param>          /// <param name="s"></param>          /// <param name="file"></param>          public void AddDirToDir(Crc32 crc, ZipOutputStream s, string file)          {              //添加此檔案夾下的檔案              string[] files = Directory.GetFiles(file);              foreach (string i in files)              {                  AddFileToDir(crc,s,i,1);              }              //查詢此檔案夾下的子檔案夾              string[] dirs=Directory.GetDirectories(file);              foreach (string i in dirs)              {                  AddDirToDir(crc,s,i);              }          }      }  }

-------------------------------------------接下來是解壓的類------------------------------------------------------

代碼如下

複製代碼

using System;  using System.Text;  using System.Collections;  using System.IO;  using System.Diagnostics;  using System.Runtime.Serialization.Formatters.Binary;  using System.Data;    using ICSharpCode.SharpZipLib.BZip2;  using ICSharpCode.SharpZipLib.Zip;  using ICSharpCode.SharpZipLib.Zip.Compression;  using ICSharpCode.SharpZipLib.Zip.Compression.Streams;  using ICSharpCode.SharpZipLib.GZip;    namespace ZipFile  {      /// <summary>      /// 解壓檔案      /// </summary>      public class UnZipFile      {          /// <summary>          /// 解壓檔案方法          /// </summary>          /// <param name="UnSourceZip">源檔案</param>          /// <param name="UnZipToPath">解壓到目錄路徑（如果為空白字元則是解壓到目前的目錄）</param>          public void UnZip(string UnSourceZip,string UnZipToPath)          {              ZipInputStream s = new ZipInputStream(File.OpenRead(UnSourceZip));                ZipEntry theEntry;              while ((theEntry = s.GetNextEntry()) != null)              {                    string fileName = Path.GetFileName(theEntry.Name);                    //產生解壓目錄                  if (!UnZipToPath.Equals(""))                      Directory.CreateDirectory(UnZipToPath);                  else                      UnZipToPath = UnSourceZip.Substring(0,UnSourceZip.LastIndexOf("\")>0?UnSourceZip.LastIndexOf("\"):0);                  if (fileName != String.Empty)                  {                      //建立檔案夾                      int startIndex = 0;                      while(theEntry.Name.IndexOf("/",startIndex)>0)                      {                          //計算檔案夾路徑                          string dirpath=theEntry.Name.Substring(0, theEntry.Name.IndexOf("/", startIndex));                          //添加檔案夾                          Directory.CreateDirectory(UnZipToPath.Equals("")? dirpath: UnZipToPath + "//" + dirpath);                          startIndex = theEntry.Name.IndexOf("/", startIndex)+1;                      }                      //解壓檔案到指定的目錄                      FileStream streamWriter = File.Create(UnZipToPath.Equals("")? theEntry.Name: UnZipToPath + "//" + 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;                          }                      }                        streamWriter.Close();                  }              }              s.Close();          }      }  }