在.NET可以通過多種方式實現zip的壓縮和解壓：1、使用System.IO.Packaging；2、使用第三方類庫；3、通過 System.IO.Compression 命名空間中新增的ZipArchive、ZipFile等類實現。
一、使用System.IO.Packaging壓縮和解壓
Package為一個抽象類，可用于將對象組織到定義的物理格式的單個實體中，從而實現可移植性與高效訪問。ZIP 文件是Package的主物理格式。 其他Package實現可以使用其他物理格式（如 XML 文檔、數據庫或 Web 服務。與文件系統類似，在分層組織的文件夾和文件中引用 Package 中包含的項。雖然 Package 是抽象類，但 Package.Open 方法默認使用 ZipPackage 派生類。
System.IO.Packaging在WindowsBase.dll程序集下，使用時需要添加對WindowsBase的引用。
1、將整個文件夾壓縮成zip
/// <summary> /// Add a folder along with its subfolders to a Package /// </summary> /// <param name="folderName">The folder to add</param> /// <param name="compressedFileName">The package to create</param> /// <param name="overrideExisting">Override exsisitng files</param> /// <returns></returns> static bool PackageFolder(string folderName, string compressedFileName, bool overrideExisting) { if (folderName.EndsWith(@"/")) folderName = folderName.Remove(folderName.Length - 1); bool result = false; if (!Directory.Exists(folderName)) { return result; } if (!overrideExisting && File.Exists(compressedFileName)) { return result; } try { using (Package package = Package.Open(compressedFileName, FileMode.Create)) { var fileList = Directory.EnumerateFiles(folderName, "*", SearchOption.AllDirectories); foreach (string fileName in fileList) { //The path in the package is all of the subfolders after folderName string pathInPackage; pathInPackage = Path.GetDirectoryName(fileName).Replace(folderName, string.Empty) + "/" + Path.GetFileName(fileName); Uri partUriDocument = PackUriHelper.CreatePartUri(new Uri(pathInPackage, UriKind.Relative)); PackagePart packagePartDocument = package.CreatePart(partUriDocument,"", CompressionOption.Maximum); using (FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read)) { fileStream.CopyTo(packagePartDocument.GetStream()); } } } result = true; } catch (Exception e) { throw new Exception("Error zipping folder " + folderName, e); } return result; }2、將單個文件添加到zip文件中
/// <summary> /// Compress a file into a ZIP archive as the container store /// </summary> /// <param name="fileName">The file to compress</param> /// <param name="compressedFileName">The archive file</param> /// <param name="overrideExisting">override existing file</param> /// <returns></returns> static bool PackageFile(string fileName, string compressedFileName, bool overrideExisting) { bool result = false; if (!File.Exists(fileName)) { return result; } if (!overrideExisting && File.Exists(compressedFileName)) { return result; } try { Uri partUriDocument = PackUriHelper.CreatePartUri(new Uri(Path.GetFileName(fileName), UriKind.Relative)); using (Package package = Package.Open(compressedFileName, FileMode.OpenOrCreate)) { if (package.PartExists(partUriDocument)) { package.DeletePart(partUriDocument); } PackagePart packagePartDocument = package.CreatePart(partUriDocument, "", CompressionOption.Maximum); using (FileStream fileStream = new FileStream(fileName, FileMode.Open, FileAccess.Read)) { fileStream.CopyTo(packagePartDocument.GetStream()); } } result = true; } catch (Exception e) { throw new Exception("Error zipping file " + fileName, e); } return result; }3、zip文件解壓
/// <summary> /// Extract a container Zip. NOTE: container must be created as Open Packaging Conventions (OPC) specification /// </summary> /// <param name="folderName">The folder to extract the package to</param> /// <param name="compressedFileName">The package file</param> /// <param name="overrideExisting">override existing files</param> /// <returns></returns> static bool UncompressFile(string folderName, string compressedFileName, bool overrideExisting) { bool result = false; try { if (!File.Exists(compressedFileName)) { return result; } DirectoryInfo directoryInfo = new DirectoryInfo(folderName); if (!directoryInfo.Exists) directoryInfo.Create(); using (Package package = Package.Open(compressedFileName, FileMode.Open, FileAccess.Read)) { foreach (PackagePart packagePart in package.GetParts()) { ExtractPart(packagePart, folderName, overrideExisting); } } result = true; } catch (Exception e) { throw new Exception("Error unzipping file " + compressedFileName, e); } return result; } static void ExtractPart(PackagePart packagePart, string targetDirectory, bool overrideExisting) { string stringPart = targetDirectory + HttpUtility.UrlDecode(packagePart.Uri.ToString()).Replace('//', '/'); if (!Directory.Exists(Path.GetDirectoryName(stringPart))) Directory.CreateDirectory(Path.GetDirectoryName(stringPart)); if (!overrideExisting && File.Exists(stringPart)) return; using (FileStream fileStream = new FileStream(stringPart, FileMode.Create)) { packagePart.GetStream().CopyTo(fileStream); } }使用Package壓縮文件會在zip文件自動生成[Content_Type].xml，用來描述zip文件解壓支持的文件格式。
<?xml version="1.0" encoding="utf-8" ?> <Types xmlns="http://schemas.openxmlformats.org/package/2006/content-types"> <Default Extension="vsixmanifest" ContentType="text/xml" /> <Default Extension="dll" ContentType="application/octet-stream" /> <Default Extension="png" ContentType="application/octet-stream" /> <Default Extension="txt" ContentType="text/plain" /> <Default Extension="pkgdef" ContentType="text/plain" /> </Types>
同樣，如果zip文件不包含[Content_Type].xml文件，或者[Content_Type].xml文件不包含所對應擴展名的描述（手動添加的[Content_Type].xml也是可以），將無法解壓文件。
二、使用第三方類庫
zip的壓縮和解壓使用比較的有SharpZipLib和DotNetZip。
1、SharpZipLib，也稱為“#ziplib”，基于GPL開源，支持Zip，GZip，Tar和BZip2的壓縮和解壓縮。
支持.NET 1.1,NET 2.0（3.5、4.0）.
（1）zip壓縮
public static void Zip(string SrcFile, string DstFile, int BufferSize){ FileStream fileStreamIn = new FileStream (SrcFile, FileMode.Open, FileAccess.Read); FileStream fileStreamOut = new FileStream (DstFile, FileMode.Create, FileAccess.Write); ZipOutputStream zipOutStream = new ZipOutputStream(fileStreamOut); byte[] buffer = new byte<buffersize />; ZipEntry entry = new ZipEntry(Path.GetFileName(SrcFile)); zipOutStream.PutNextEntry(entry); int size; do { size = fileStreamIn.Read(buffer, 0, buffer.Length); zipOutStream.Write(buffer, 0, size); } while (size > 0); zipOutStream.Close(); fileStreamOut.Close(); fileStreamIn.Close();}（2）解壓zip
public static void UnZip(string SrcFile, string DstFile, int BufferSize){ FileStream fileStreamIn = new FileStream (SrcFile, FileMode.Open, FileAccess.Read); ZipInputStream zipInStream = new ZipInputStream(fileStreamIn); ZipEntry entry = zipInStream.GetNextEntry(); FileStream fileStreamOut = new FileStream (DstFile + @"/" + entry.Name, FileMode.Create, FileAccess.Write); int size; byte[] buffer = new byte<buffersize />; do { size = zipInStream.Read(buffer, 0, buffer.Length); fileStreamOut.Write(buffer, 0, size); } while (size > 0); zipInStream.Close(); fileStreamOut.Close(); fileStreamIn.Close();}2、DotNetLib，是基于”WS-PL”開源，使用比較簡單
(1)壓縮
using (ZipFile zip = new ZipFile()) { zip.AddFile("ReadMe.txt"); zip.AddFile("7440-N49th.png"); zip.AddFile("2008_Annual_Report.pdf"); zip.Save("Archive.zip"); }（2）解壓
private void MyExtract() { string zipToUnpack = "C1P3SML.zip"; string unpackDirectory = "Extracted Files"; using (ZipFile zip1 = ZipFile.Read(zipToUnpack)) { // here, we extract every entry, but we could extract conditionally // based on entry name, size, date, checkbox status, etc. foreach (ZipEntry e in zip1) { e.Extract(unpackDirectory, ExtractExistingFileAction.OverwriteSilently); } } }三、在.NET 4.5使用ZipArchive、ZipFile等類壓縮和解壓
static void Main(string[] args) { string ZipPath = @"c:/users/exampleuser/start.zip"; string ExtractPath = @"c:/users/exampleuser/extract"; string NewFile = @"c:/users/exampleuser/NewFile.txt"; using (ZipArchive Archive = ZipFile.Open(ZipPath, ZipArchiveMode.Update)) { Archive.CreateEntryFromFile(NewFile, "NewEntry.txt"); Archive.ExtractToDirectory(ExtractPath); } }以上就是本文的全部內容，希望對大家的學習有所幫助，也希望大家多多支持VeVb武林網。
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