Sharpziplib 提取 ZIP C#（對於開發者的運行原理）

What is SharpZipLib?

SharpZipLib is a feature-rich, open-source compression library for .NET, written entirely in C#. It provides comprehensive support for various compression formats, including ZIP, GZip, and Tar. Developed by a dedicated community, SharpZipLib offers a wide range of functionalities for compressing and decompressing files efficiently.

Advantages of SharpZipLib

1. Open Source: As an open-source library, SharpZipLib encourages collaboration and community contributions, ensuring continuous improvement and adaptability to evolving needs.
2. Cross-Platform Compatibility: SharpZipLib, being written in C# and targeting the .NET framework, is compatible with various platforms, including Windows, Linux, and macOS, enhancing its versatility.
3. Lightweight and Efficient: SharpZipLib is designed to be lightweight and efficient, minimizing resource consumption while delivering high-performance compression and decompression capabilities.
4. Extensive Documentation and Support: Comprehensive documentation and community support make it easier for developers to integrate and troubleshoot issues when using SharpZipLib.

Create C# Visual Studio Project

1. Open Visual Studio and click on the "Create a new project" option.

2. Choose the appropriate project template based on your requirements (e.g., Console Application, Windows Forms Application).

   

3. Specify the project name and location, then click "Next".

   

4. From Additional Information, select the latest .NET Framework. Click "Create" to create the project.

Installation Process

To integrate SharpZipLib into your .NET project:

1. In your Visual Studio IDE C# ConsoleApp, right-click on your project in Solution Explorer and select "Manage NuGet Packages..."

2. In the NuGet Package Manager window, search for "SharpZipLib".

   

3. Select "SharpZipLib" from the search results and click on the "Install" button.
4. NuGet will download and add the necessary dependencies to your project automatically.

代碼示例

Here's a simplified example demonstrating how to use SharpZipLib to compress and decompress files:

using ICSharpCode.SharpZipLib.Zip;
using System;
using System.IO;

namespace SharpZipLibExample
{
    class Program
    {
        static void Main(string[] args)
        {
            string sourceDirectory = @"C:\SourceDirectory";     // Source directory containing files to compress
            string zipFilePath = @"C:\OutputDirectory\compressed.zip"; // Output path for the compressed ZIP file

            // Compress files from the source directory
            CompressDirectory(sourceDirectory, zipFilePath);
            Console.WriteLine("Files compressed successfully.");

            string extractPath = @"C:\OutputDirectory\extracted"; // Path to extract the decompressed files

            // Decompress files from the ZIP archive
            Decompress(zipFilePath, extractPath);
            Console.WriteLine("Files decompressed successfully.");
        }

        // Method to compress all files in a directory to a ZIP file
        static void CompressDirectory(string sourceDirectory, string zipFilePath)
        {
            using (var zipOutputStream = new ZipOutputStream(File.Create(zipFilePath)))
            {
                zipOutputStream.SetLevel(5); // Set compression level (0-9), 5 as a mid-range

                // Recursively add files in the source directory to the ZIP file
                AddDirectoryFilesToZip(sourceDirectory, zipOutputStream);

                zipOutputStream.Finish();
                zipOutputStream.Close();
            }
        }

        // Method to add files from a directory to a ZIP output stream
        static void AddDirectoryFilesToZip(string sourceDirectory, ZipOutputStream zipOutputStream)
        {
            // Get list of files in the directory
            string[] files = Directory.GetFiles(sourceDirectory);

            foreach (string file in files)
            {
                var entry = new ZipEntry(Path.GetFileName(file)); // Create a new entry for each file
                zipOutputStream.PutNextEntry(entry);

                using (var fileStream = File.OpenRead(file))
                {
                    // Buffer for reading files
                    byte[] buffer = new byte[4096];
                    int sourceBytes;

                    // Read file and write to ZIP stream
                    while ((sourceBytes = fileStream.Read(buffer, 0, buffer.Length)) > 0)
                    {
                        zipOutputStream.Write(buffer, 0, sourceBytes);
                    }
                }
            }

            // Handle subdirectories recursively
            string[] subdirectories = Directory.GetDirectories(sourceDirectory);
            foreach (string subdirectory in subdirectories)
            {
                AddDirectoryFilesToZip(subdirectory, zipOutputStream);
            }
        }

        // Method to decompress files from a ZIP file
        static void Decompress(string zipFilePath, string extractPath)
        {
            using (var zipInputStream = new ZipInputStream(File.OpenRead(zipFilePath)))
            {
                ZipEntry entry;
                // Read entries from the ZIP archive
                while ((entry = zipInputStream.GetNextEntry()) != null)
                {
                    string entryPath = Path.Combine(extractPath, entry.Name);

                    // Process files
                    if (entry.IsFile)
                    {
                        string directoryName = Path.GetDirectoryName(entryPath);
                        if (!Directory.Exists(directoryName))
                            Directory.CreateDirectory(directoryName);

                        using (var fileStream = File.Create(entryPath))
                        {
                            // Buffer for reading entries
                            byte[] buffer = new byte[4096];
                            int bytesRead;
                            // Read from ZIP stream and write to file
                            while ((bytesRead = zipInputStream.Read(buffer, 0, buffer.Length)) > 0)
                            {
                                fileStream.Write(buffer, 0, bytesRead);
                            }
                        }
                    }
                    else if (entry.IsDirectory) // Process directories
                    {
                        Directory.CreateDirectory(entryPath);
                    }
                }
            }
        }
    }
}

using ICSharpCode.SharpZipLib.Zip;
using System;
using System.IO;

namespace SharpZipLibExample
{
    class Program
    {
        static void Main(string[] args)
        {
            string sourceDirectory = @"C:\SourceDirectory";     // Source directory containing files to compress
            string zipFilePath = @"C:\OutputDirectory\compressed.zip"; // Output path for the compressed ZIP file

            // Compress files from the source directory
            CompressDirectory(sourceDirectory, zipFilePath);
            Console.WriteLine("Files compressed successfully.");

            string extractPath = @"C:\OutputDirectory\extracted"; // Path to extract the decompressed files

            // Decompress files from the ZIP archive
            Decompress(zipFilePath, extractPath);
            Console.WriteLine("Files decompressed successfully.");
        }

        // Method to compress all files in a directory to a ZIP file
        static void CompressDirectory(string sourceDirectory, string zipFilePath)
        {
            using (var zipOutputStream = new ZipOutputStream(File.Create(zipFilePath)))
            {
                zipOutputStream.SetLevel(5); // Set compression level (0-9), 5 as a mid-range

                // Recursively add files in the source directory to the ZIP file
                AddDirectoryFilesToZip(sourceDirectory, zipOutputStream);

                zipOutputStream.Finish();
                zipOutputStream.Close();
            }
        }

        // Method to add files from a directory to a ZIP output stream
        static void AddDirectoryFilesToZip(string sourceDirectory, ZipOutputStream zipOutputStream)
        {
            // Get list of files in the directory
            string[] files = Directory.GetFiles(sourceDirectory);

            foreach (string file in files)
            {
                var entry = new ZipEntry(Path.GetFileName(file)); // Create a new entry for each file
                zipOutputStream.PutNextEntry(entry);

                using (var fileStream = File.OpenRead(file))
                {
                    // Buffer for reading files
                    byte[] buffer = new byte[4096];
                    int sourceBytes;

                    // Read file and write to ZIP stream
                    while ((sourceBytes = fileStream.Read(buffer, 0, buffer.Length)) > 0)
                    {
                        zipOutputStream.Write(buffer, 0, sourceBytes);
                    }
                }
            }

            // Handle subdirectories recursively
            string[] subdirectories = Directory.GetDirectories(sourceDirectory);
            foreach (string subdirectory in subdirectories)
            {
                AddDirectoryFilesToZip(subdirectory, zipOutputStream);
            }
        }

        // Method to decompress files from a ZIP file
        static void Decompress(string zipFilePath, string extractPath)
        {
            using (var zipInputStream = new ZipInputStream(File.OpenRead(zipFilePath)))
            {
                ZipEntry entry;
                // Read entries from the ZIP archive
                while ((entry = zipInputStream.GetNextEntry()) != null)
                {
                    string entryPath = Path.Combine(extractPath, entry.Name);

                    // Process files
                    if (entry.IsFile)
                    {
                        string directoryName = Path.GetDirectoryName(entryPath);
                        if (!Directory.Exists(directoryName))
                            Directory.CreateDirectory(directoryName);

                        using (var fileStream = File.Create(entryPath))
                        {
                            // Buffer for reading entries
                            byte[] buffer = new byte[4096];
                            int bytesRead;
                            // Read from ZIP stream and write to file
                            while ((bytesRead = zipInputStream.Read(buffer, 0, buffer.Length)) > 0)
                            {
                                fileStream.Write(buffer, 0, bytesRead);
                            }
                        }
                    }
                    else if (entry.IsDirectory) // Process directories
                    {
                        Directory.CreateDirectory(entryPath);
                    }
                }
            }
        }
    }
}

Imports ICSharpCode.SharpZipLib.Zip
Imports System
Imports System.IO

Namespace SharpZipLibExample
	Friend Class Program
		Shared Sub Main(ByVal args() As String)
			Dim sourceDirectory As String = "C:\SourceDirectory" ' Source directory containing files to compress
			Dim zipFilePath As String = "C:\OutputDirectory\compressed.zip" ' Output path for the compressed ZIP file

			' Compress files from the source directory
			CompressDirectory(sourceDirectory, zipFilePath)
			Console.WriteLine("Files compressed successfully.")

			Dim extractPath As String = "C:\OutputDirectory\extracted" ' Path to extract the decompressed files

			' Decompress files from the ZIP archive
			Decompress(zipFilePath, extractPath)
			Console.WriteLine("Files decompressed successfully.")
		End Sub

		' Method to compress all files in a directory to a ZIP file
		Private Shared Sub CompressDirectory(ByVal sourceDirectory As String, ByVal zipFilePath As String)
			Using zipOutputStream As New ZipOutputStream(File.Create(zipFilePath))
				zipOutputStream.SetLevel(5) ' Set compression level (0-9), 5 as a mid-range

				' Recursively add files in the source directory to the ZIP file
				AddDirectoryFilesToZip(sourceDirectory, zipOutputStream)

				zipOutputStream.Finish()
				zipOutputStream.Close()
			End Using
		End Sub

		' Method to add files from a directory to a ZIP output stream
		Private Shared Sub AddDirectoryFilesToZip(ByVal sourceDirectory As String, ByVal zipOutputStream As ZipOutputStream)
			' Get list of files in the directory
			Dim files() As String = Directory.GetFiles(sourceDirectory)

			For Each file As String In files
				Dim entry = New ZipEntry(Path.GetFileName(file)) ' Create a new entry for each file
				zipOutputStream.PutNextEntry(entry)

				Using fileStream = System.IO.File.OpenRead(file)
					' Buffer for reading files
					Dim buffer(4095) As Byte
					Dim sourceBytes As Integer

					' Read file and write to ZIP stream
					sourceBytes = fileStream.Read(buffer, 0, buffer.Length)
'INSTANT VB WARNING: An assignment within expression was extracted from the following statement:
'ORIGINAL LINE: while ((sourceBytes = fileStream.Read(buffer, 0, buffer.Length)) > 0)
					Do While sourceBytes > 0
						zipOutputStream.Write(buffer, 0, sourceBytes)
						sourceBytes = fileStream.Read(buffer, 0, buffer.Length)
					Loop
				End Using
			Next file

			' Handle subdirectories recursively
			Dim subdirectories() As String = Directory.GetDirectories(sourceDirectory)
			For Each subdirectory As String In subdirectories
				AddDirectoryFilesToZip(subdirectory, zipOutputStream)
			Next subdirectory
		End Sub

		' Method to decompress files from a ZIP file
		Private Shared Sub Decompress(ByVal zipFilePath As String, ByVal extractPath As String)
			Using zipInputStream As New ZipInputStream(File.OpenRead(zipFilePath))
				Dim entry As ZipEntry
				' Read entries from the ZIP archive
				entry = zipInputStream.GetNextEntry()
'INSTANT VB WARNING: An assignment within expression was extracted from the following statement:
'ORIGINAL LINE: while ((entry = zipInputStream.GetNextEntry()) != null)
				Do While entry IsNot Nothing
					Dim entryPath As String = Path.Combine(extractPath, entry.Name)

					' Process files
					If entry.IsFile Then
						Dim directoryName As String = Path.GetDirectoryName(entryPath)
						If Not Directory.Exists(directoryName) Then
							Directory.CreateDirectory(directoryName)
						End If

						Using fileStream = File.Create(entryPath)
							' Buffer for reading entries
							Dim buffer(4095) As Byte
							Dim bytesRead As Integer
							' Read from ZIP stream and write to file
							bytesRead = zipInputStream.Read(buffer, 0, buffer.Length)
'INSTANT VB WARNING: An assignment within expression was extracted from the following statement:
'ORIGINAL LINE: while ((bytesRead = zipInputStream.Read(buffer, 0, buffer.Length)) > 0)
							Do While bytesRead > 0
								fileStream.Write(buffer, 0, bytesRead)
								bytesRead = zipInputStream.Read(buffer, 0, buffer.Length)
							Loop
						End Using
					ElseIf entry.IsDirectory Then ' Process directories
						Directory.CreateDirectory(entryPath)
					End If
					entry = zipInputStream.GetNextEntry()
				Loop
			End Using
		End Sub
	End Class
End Namespace

SharpZipLib has long been a staple in the .NET language development community, providing essential functionality for working with compressed archives such as ZIP, GZip, Tar, and BZip2. However, as technology evolves and developers seek more advanced solutions, certain limitations of SharpZipLib have become apparent.

Limitations of SharpZipLib

1. Complexity: SharpZipLib's API can be cumbersome and verbose, requiring developers to write lengthy code to perform simple tasks such as creating or extracting ZIP archives.
2. Lack of Modern Features: SharpZipLib lacks support for modern .NET features and platforms, making it less suitable for contemporary development environments.
3. Limited Documentation: While SharpZipLib has been around for a long time, its documentation is often sparse and outdated, making it challenging for developers to get started or troubleshoot issues.
4. Performance: SharpZipLib's performance may not always meet the expectations of developers, especially when dealing with large or complex archives.

IronZIP: Bridging the Gap

IronZIP Documentation, developed by Iron Software Overview, is a modern and efficient solution for managing ZIP archives in .NET applications. With its intuitive API, developers can easily create, read, and manipulate ZIP files. IronZIP offers advanced features like customizable compression levels and password protection, ensuring flexibility and data security. Compatible with the latest .NET versions and optimized for performance, IronZIP streamlines archive management tasks with ease and efficiency.

IronZIP Features emerges as a robust and modern solution that addresses the shortcomings of SharpZipLib. Here's how IronZIP fills the gaps:

1. Advanced API: IronZIP offers an intuitive and developer-friendly API that simplifies archive management tasks. With IronZIP, developers can accomplish complex operations with just a few lines of code, reducing development time and effort.
2. Full .NET Support: IronZIP fully supports the latest .NET versions, including .NET Core, .NET Standard, and .NET Framework, ensuring compatibility with modern development environments and platforms.
3. Comprehensive Documentation: IronZIP comes with comprehensive documentation and examples, empowering developers to quickly grasp its features and capabilities. The extensive documentation helps streamline the learning curve and facilitates rapid integration into projects.
4. Compression Level Control: IronZIP provides developers with control over the compression level, allowing them to adjust the level of compression based on their requirements. This feature enables developers to balance between file size reduction and compression speed.
5. Password Protection: IronZIP supports password protection for ZIP archives, enhancing security for sensitive data. Developers can easily encrypt ZIP archives with traditional, AES128, and AES256 passwords, ensuring that only authorized users can access the contents of the archive.
6. Performance Optimization: IronZIP is optimized for performance, delivering faster compression and extraction speeds compared to SharpZipLib. This optimization ensures that developers can efficiently handle large volumes of data without compromising on performance.

Explore IronZIP Documentation for more information on getting started with IronZIP. The IronZIP Code Examples help you to start without any hassle.

using IronZip;
using IronZip.Enum;

class Program
{
    static void Main()
    {
        // Create an empty ZIP with the highest compression
        using (var archive = new IronZipArchive(9))
        {
            // Password protect the ZIP (Support AES128 & AES256)
            archive.SetPassword("P@ssw0rd", EncryptionMethods.Traditional);
            archive.AddArchiveEntry("./assets/file1.txt");
            archive.AddArchiveEntry("./assets/file2.txt");
            // Export the ZIP
            archive.SaveAs("output.zip");
        }
    }
}

using IronZip;
using IronZip.Enum;

class Program
{
    static void Main()
    {
        // Create an empty ZIP with the highest compression
        using (var archive = new IronZipArchive(9))
        {
            // Password protect the ZIP (Support AES128 & AES256)
            archive.SetPassword("P@ssw0rd", EncryptionMethods.Traditional);
            archive.AddArchiveEntry("./assets/file1.txt");
            archive.AddArchiveEntry("./assets/file2.txt");
            // Export the ZIP
            archive.SaveAs("output.zip");
        }
    }
}

Imports IronZip
Imports IronZip.Enum

Friend Class Program
	Shared Sub Main()
		' Create an empty ZIP with the highest compression
		Using archive = New IronZipArchive(9)
			' Password protect the ZIP (Support AES128 & AES256)
			archive.SetPassword("P@ssw0rd", EncryptionMethods.Traditional)
			archive.AddArchiveEntry("./assets/file1.txt")
			archive.AddArchiveEntry("./assets/file2.txt")
			' Export the ZIP
			archive.SaveAs("output.zip")
		End Using
	End Sub
End Class

結論

SharpZipLib Overview emerges as a powerful compression library for .NET, offering a rich set of features and capabilities for handling compressed files efficiently. Whether it's compressing data for storage, archiving files, or optimizing bandwidth usage in web services, SharpZipLib provides the necessary tools to streamline compression and decompression operations. With its open-source nature, cross-platform compatibility, and robust functionality, SharpZipLib remains a top choice for developers seeking a reliable solution for compression tasks in their .NET applications.

While SharpZipLib has been a reliable choice for working with compressed archives in .NET applications, its limitations have become increasingly apparent in today's development landscape. Explore IronZIP API steps in to fill the gaps left by SharpZipLib, offering a modern and feature-rich alternative that prioritizes ease of use, performance, and compatibility. With IronZIP, developers can unlock new possibilities in archive management and streamline their development workflow with advanced capabilities and intuitive API.

IronZIP provides a free trial licensing overview. Download the library from IronZIP Downloads and give it a try.