如何在 C# 中将文件解压到目录

Why Would You Unzip Files?

ZIP files, also known as ZIP archives, are bundles of multiple files into a single compressed container. Unzipping these files involves extracting the compressed data and restoring it to its original state. This process is essential when you need to access or manipulate data within a C# application. IronZIP streamlines this task by providing simple methods for managing compressed data.

What is IronZIP?

IronZIP is a powerful C# ZIP archive library that facilitates creating, reading, and extracting archives in .NET applications. Whether you need to compress files, extract data from existing archives, or manage your ZIP files, IronZIP provides a user-friendly API for achieving these tasks efficiently. IronZIP simplifies working with ZIP archives in your .NET applications.

It supports various archive formats, including ZIP, TAR, GZIP, and BZIP2. IronZIP is cross-platform, compatible with .NET Core, .NET Standard, and .NET Framework. And it offers advanced features like password-protected archives, customizable compression levels, and file entry management.

How to Extract Files to a Directory in C#

Now, I will discuss some examples for extracting from ZIP files in C#. Start by creating a new C# project in Visual Studio. Choose the appropriate project type (e.g., Console Application, Windows Forms, ASP.NET Core, etc.). Next, we need to install the IronZIP NuGet Package.

Install-Package IronZip

using IronZip;

using IronZip;

Imports IronZip

// This line extracts the "Images.zip" archive to the "Extracted Images" directory
IronZipArchive.ExtractArchiveToDirectory(@"E:\Images.zip", "Extracted Images");

// This line extracts the "Images.zip" archive to the "Extracted Images" directory
IronZipArchive.ExtractArchiveToDirectory(@"E:\Images.zip", "Extracted Images");

' This line extracts the "Images.zip" archive to the "Extracted Images" directory
IronZipArchive.ExtractArchiveToDirectory("E:\Images.zip", "Extracted Images")

// This line extracts the "EncryptedImages.zip" archive to the "ExtractedImages" directory with the given password
IronZipArchive.ExtractArchiveToDirectory(@"EncryptedImages.zip", "ExtractedImages", "zipP@55w0rd");

// This line extracts the "EncryptedImages.zip" archive to the "ExtractedImages" directory with the given password
IronZipArchive.ExtractArchiveToDirectory(@"EncryptedImages.zip", "ExtractedImages", "zipP@55w0rd");

' This line extracts the "EncryptedImages.zip" archive to the "ExtractedImages" directory with the given password
IronZipArchive.ExtractArchiveToDirectory("EncryptedImages.zip", "ExtractedImages", "zipP@55w0rd")

How to Create a ZIP Archive

The following code example will create a ZIP archive.

static void Main(string[] args)
{
    // Create a new ZIP archive with a high compression level (9)
    using (var archive = new IronZipArchive(9))
    {
        // Add image files to the archive
        archive.Add(@"E:\Images\image1.png");
        archive.Add(@"E:\Images\image2.png");
        archive.Add(@"E:\Images\image3.png");
        archive.Add(@"E:\Images\image4.png");

        // Export the ZIP archive to the file "MyImages.zip"
        archive.SaveAs("MyImages.zip");
    }
}

static void Main(string[] args)
{
    // Create a new ZIP archive with a high compression level (9)
    using (var archive = new IronZipArchive(9))
    {
        // Add image files to the archive
        archive.Add(@"E:\Images\image1.png");
        archive.Add(@"E:\Images\image2.png");
        archive.Add(@"E:\Images\image3.png");
        archive.Add(@"E:\Images\image4.png");

        // Export the ZIP archive to the file "MyImages.zip"
        archive.SaveAs("MyImages.zip");
    }
}

Shared Sub Main(ByVal args() As String)
	' Create a new ZIP archive with a high compression level (9)
	Using archive = New IronZipArchive(9)
		' Add image files to the archive
		archive.Add("E:\Images\image1.png")
		archive.Add("E:\Images\image2.png")
		archive.Add("E:\Images\image3.png")
		archive.Add("E:\Images\image4.png")

		' Export the ZIP archive to the file "MyImages.zip"
		archive.SaveAs("MyImages.zip")
	End Using
End Sub

The above code demonstrates the usage of IronZIP to create a new ZIP archive (with compression level 9) and add multiple entries, each representing an image file (image1.png, image2.png, image3.png, and image4.png) from the specified file paths.

Finally, the SaveAs method is used to export the created ZIP archive as "MyImages.zip" in the specified directory. The compression level 9 indicates maximum compression, resulting in smaller file sizes but potentially longer processing times.

How to Create a Password-Protected ZIP Archive

The following code will create a password-protected ZIP file.

// Create a new ZIP archive with a high compression level (9)
using (var archive = new IronZipArchive(9))
{
    // Password protect the ZIP archive (Support AES128 & AES256)
    archive.Encrypt("miPassw0rd", EncryptionMethods.AES256);

    // Add image files to the archive
    archive.Add(@"E:\Images\image1.png");
    archive.Add(@"E:\Images\image2.png");

    // Export the ZIP archive as "PasswordProtectedImages.zip"
    archive.SaveAs("PasswordProtectedImages.zip");
}

// Create a new ZIP archive with a high compression level (9)
using (var archive = new IronZipArchive(9))
{
    // Password protect the ZIP archive (Support AES128 & AES256)
    archive.Encrypt("miPassw0rd", EncryptionMethods.AES256);

    // Add image files to the archive
    archive.Add(@"E:\Images\image1.png");
    archive.Add(@"E:\Images\image2.png");

    // Export the ZIP archive as "PasswordProtectedImages.zip"
    archive.SaveAs("PasswordProtectedImages.zip");
}

' Create a new ZIP archive with a high compression level (9)
Using archive = New IronZipArchive(9)
	' Password protect the ZIP archive (Support AES128 & AES256)
	archive.Encrypt("miPassw0rd", EncryptionMethods.AES256)

	' Add image files to the archive
	archive.Add("E:\Images\image1.png")
	archive.Add("E:\Images\image2.png")

	' Export the ZIP archive as "PasswordProtectedImages.zip"
	archive.SaveAs("PasswordProtectedImages.zip")
End Using

The above code demonstrates the use of IronZIP to create a password-protected ZIP archive with a specified encryption method (AES256 in this case). The password "miPassw0rd" is set to secure the ZIP file. The code then adds two image files (image1.png and image2.png) from the specified file paths to the archive.

Finally, the SaveAs method is utilized to export the password-protected ZIP archive as "PasswordProtectedImages.zip." This ensures the security of the contents with the specified password and encryption method. IronZIP supports AES128, AES256, and traditional methods.

Conclusion

In summary, this article has covered the essential aspects of programmatically handling compressed files in C# using the IronZIP library. From the installation process to practical examples of extracting, creating, and securing ZIP archives, developers have been provided with valuable insights. IronZIP's user-friendly API, cross-platform compatibility, and support for encryption methods make it a versatile solution for efficiently managing ZIP files in various C# applications.

Whether updating existing files or working with password-protected archives, IronZIP streamlines the process, offering a robust toolset for developers seeking effective file manipulation capabilities in their C# projects.

IronZIP offers flexible licensing options, including a free trial for long-term usage. Developers can choose the licensing model that best fits their project requirements, ensuring both versatility and convenience in implementing IronZIP in their C# applications.