C# ICSharpCode.SharpZipLib.dll文件壓縮和解壓功能類整理，上傳文件或下載文件很常用

工作中我們很多時候需要進行對文件進行壓縮，比較通用的壓縮的dll就是ICSharpCode.SharpZipLib.dll，廢話不多了，網上也有很多的資料，我將其最常用的兩個函數(shù)整理了一下，提供了一個通用的類，這樣在工作中可以快速的完成壓縮和解壓縮的動作哦

官網下載地址：http://www.icsharpcode.net/OpenSource/SharpZipLib/Download.aspx

1. 在項目中添加對ICSharpCode.SharpZipLib.dll的引用；

2. 在需要使用到ICSharpCode.SharpZipLib中定義的類的編碼界面中將其導入(Imports)

 1 using ICSharpCode.SharpZipLib.Zip; 2 using System; 3 using System.IO; 4  5 namespace ZTO.WayBill.Utilities 6 { 7     /// <summary> 8     /// 壓縮類 9     /// http://www.survivalescaperooms.com/kissdodog/p/3525295.html 10 11     /// </summary>12     public class ZipHelper13     {14         /// <summary>15         /// 壓縮文件夾16         /// </summary>17         /// <param name="source">源目錄</param>18         /// <param name="s">ZipOutputStream對象</param>19         public static void ComPRess(string source, ZipOutputStream s)20         {21             string[] filenames = Directory.GetFileSystemEntries(source);22             foreach (string file in filenames)23             {24                 if (Directory.Exists(file))25                 {26                     // 遞歸壓縮子文件夾27                     Compress(file, s);28                 }29                 else30                 {31                     using (FileStream fs = File.OpenRead(file))32                     {33                         byte[] buffer = new byte[4 * 1024];34                         // 此處去掉盤符，如D:/123/1.txt 去掉D:35                         ZipEntry entry = new ZipEntry(file.Replace(Path.GetPathRoot(file), ""));36                         entry.DateTime = DateTime.Now;37                         s.PutNextEntry(entry);38                         int sourceBytes;39                         do40                         {41                             sourceBytes = fs.Read(buffer, 0, buffer.Length);42                             s.Write(buffer, 0, sourceBytes);43                         } while (sourceBytes > 0);44                     }45                 }46             }47         }48 49         /// <summary>50         /// 解壓縮51         /// </summary>52         /// <param name="sourceFile">壓縮包完整路徑地址</param>53         /// <param name="targetPath">解壓路徑是哪里</param>54         /// <returns></returns>55         public static bool Decompress(string sourceFile, string targetPath)56         {57             if (!File.Exists(sourceFile))58             {59                 throw new FileNotFoundException(string.Format("未能找到文件 '{0}' ", sourceFile));60             }61             if (!Directory.Exists(targetPath))62             {63                 Directory.CreateDirectory(targetPath);64             }65             using (var s = new ZipInputStream(File.OpenRead(sourceFile)))66             {67                 ZipEntry theEntry;68                 while ((theEntry = s.GetNextEntry()) != null)69                 {70                     if (theEntry.IsDirectory)71                     {72                         continue;73                     }74                     string directorName = Path.Combine(targetPath, Path.GetDirectoryName(theEntry.Name));75                     string fileName = Path.Combine(directorName, Path.GetFileName(theEntry.Name));76                     if (!Directory.Exists(directorName))77                     {78                         Directory.CreateDirectory(directorName);79                     }80                     if (!String.IsNullOrEmpty(fileName))81                     {82                         using (FileStream streamWriter = File.Create(fileName))83                         {84                             int size = 4096;85                             byte[] data = new byte[size];86                             while (size > 0)87                             {88                                 streamWriter.Write(data, 0, size);89                                 size = s.Read(data, 0, data.Length);90                             }91                         }92                     }93                 }94             }95             return true;96         }97     }98 }