如何在 VB.NET 中提取 Zip 文件

How to Extract Zip Files in VB.NET

1. Install IronZIP Library.
2. Use IronZipArchive.ExtractArchiveToDirectory() method to extract ZIP files.
3. Use IronZipArchive.ExtractArchiveToDirectory() method to extract password-protected ZIP files.
4. Use the GetArchiveEntryNames() method to get all the entries of the ZIP file.

What is IronZIP?

IronZIP, a collection of .NET software components for various development needs. IronZIP stands out for its ease of use, performance, and support for a wide range of compression and decompression features.

Use Cases of IronZIP

Some use cases of IronZIP are:

1. File compression: You can use IronZIP to reduce the size of your files and save disk space or bandwidth.
2. File distribution: You can use IronZIP to bundle multiple files into a single archive, making sharing or transferring them easier.
3. File encryption: You can use IronZIP to protect your files with passwords and permissions, and prevent unauthorized access or modification.
4. File extraction: You can use IronZIP to open and read ZIP files from various sources, such as local files, streams, or URLs, and extract the contents or metadata.
5. File management: You can use IronZIP to manipulate ZIP files, such as adding, deleting, or merging entries, changing compression formats, or validating the integrity of the archive.

Getting Started with IronZIP

To begin using IronZIP in your VB.NET project, we'll need to install the IronZIP library. We can easily do this by using NuGet Package Manager Console or Visual Studio's NuGet Package Manager.

Install-Package IronZip

VB.NET Extract Zip file

Now, let's explore a simple way to extract ZIP files using IronZIP:

Imports IronZip

Module Program
    Sub Main(args As String())
        ' Set paths for the ZIP file and the extraction directory
        Dim extractPath As String = "D:\ExtractedFiles"
        Dim zipPath As String = "D:\Docs.zip"

        ' Extract the ZIP file to the specified directory
        IronZipArchive.ExtractArchiveToDirectory(zipPath, extractPath)
    End Sub
End Module

Imports IronZip

Module Program
    Sub Main(args As String())
        ' Set paths for the ZIP file and the extraction directory
        Dim extractPath As String = "D:\ExtractedFiles"
        Dim zipPath As String = "D:\Docs.zip"

        ' Extract the ZIP file to the specified directory
        IronZipArchive.ExtractArchiveToDirectory(zipPath, extractPath)
    End Sub
End Module

We have used the ExtractArchiveToDirectory method of the IronZipArchive class, which extracts all the entries from a ZIP archive to a specified directory. It passes two arguments to the method: the path of the ZIP file (“D:\Docs.zip”) and the path of the destination directory (“D:\ExtractedFiles”). If different directories are not specified, it will extract files into the default program folder.

Extract all the Files from Password-Protected ZIP Archive

To extract all files from a password-protected ZIP archive using IronZIP in VB.NET, we can use the following code snippet:

Imports IronZip

Module Program
    Sub Main(args As String())
        ' Extract password-protected ZIP archive using a password
        IronZipArchive.ExtractArchiveToDirectory("PasswordProtectedZip.zip", "extractedDocs", "myPassw0rd")
    End Sub
End Module

Imports IronZip

Module Program
    Sub Main(args As String())
        ' Extract password-protected ZIP archive using a password
        IronZipArchive.ExtractArchiveToDirectory("PasswordProtectedZip.zip", "extractedDocs", "myPassw0rd")
    End Sub
End Module

The above VB.NET code uses the IronZIP library to extract items of a password-protected ZIP archive. It calls the ExtractArchiveToDirectory method of the IronZipArchive class, which extracts all the entries from a ZIP archive to a specified directory. It passes three arguments to the method: the full path of the ZIP file (“PasswordProtectedZip.zip”), the path of the destination directory (“extractedDocs”), and the password of the ZIP file (“myPassw0rd”).

IronZIP supports AES-128, AES-256, and traditional encryption algorithms. If the password is incorrect or the ZIP file is not encrypted, the method will throw an exception. The extracted files are:

Imports IronZip

Sub Main(args As String())
    ' Specify the ZIP file path
    Dim startPath As String = "D:\Docs.zip"

    ' Open the ZIP archive and list entry names
    Using archive As New IronZipArchive(startPath)
        Dim names As List(Of String) = archive.GetArchiveEntryNames()

        ' Print each entry name to the console
        For Each name As String In names
            Console.WriteLine(name)
        Next name
    End Using
End Sub

Imports IronZip

Sub Main(args As String())
    ' Specify the ZIP file path
    Dim startPath As String = "D:\Docs.zip"

    ' Open the ZIP archive and list entry names
    Using archive As New IronZipArchive(startPath)
        Dim names As List(Of String) = archive.GetArchiveEntryNames()

        ' Print each entry name to the console
        For Each name As String In names
            Console.WriteLine(name)
        Next name
    End Using
End Sub

Conclusion

In conclusion, IronZIP emerges as a powerful tool for handling ZIP archives in VB.NET, offering a rich set of features for compression, extraction, and manipulation. Its versatility extends beyond the basics, allowing developers to seamlessly integrate functionalities like password protection, encryption, and efficient file management. By exploring the examples provided, you can unlock the full potential of IronZIP in your VB.NET projects.

As demonstrated, the library simplifies the extraction process, enabling developers to effortlessly handle password-protected ZIP archives, view file entries, and perform various operations with ease. Moreover, IronZIP's compatibility with a range of compression formats and support across multiple platforms makes it a valuable asset for developers working in diverse environments. IronZIP provides a free trial option that aligns perfectly with their requirements.