ZipFileExtensions クラス

定義

public ref class ZipFileExtensions abstract sealed

public static class ZipFileExtensions

type ZipFileExtensions = class

Public Module ZipFileExtensions

継承

Object

ZipFileExtensions

注釈

クラスには、 ZipFileExtensions クラスおよびクラスを拡張する静的メソッドのみが含まれてい ZipArchive ZipArchiveEntry ます。The ZipFileExtensions class contains only static methods that extend the ZipArchive and ZipArchiveEntry classes. クラスのインスタンスを作成するので ZipFileExtensions はなく、またはのインスタンスからこれらのメソッドを使用し ZipArchive ZipArchiveEntry ます。You do not create an instance of the ZipFileExtensions class; instead, you use these methods from instances of ZipArchive or ZipArchiveEntry.

拡張メソッドを使用するには、プロジェクトでアセンブリを参照する必要があり System.IO.Compression.FileSystem ます。To use the extension methods, you must reference the System.IO.Compression.FileSystem assembly in your project. この System.IO.Compression.FileSystem アセンブリは、Windows 8.X ストアアプリでは使用できません。The System.IO.Compression.FileSystem assembly is not available in Windows 8.x Store apps. そのため、 ZipFileExtensions および ZipFile クラス (どちらもアセンブリに含まれてい System.IO.Compression.FileSystem ます) は、Windows 8.x ストアアプリでは使用できません。Therefore, the ZipFileExtensions and ZipFile classes (both of which are in the System.IO.Compression.FileSystem assembly) are not available in Windows 8.x Store apps. Windows 8.x ストアアプリでは、、、、およびのメソッドを使用して、圧縮されたファイルを操作します ZipArchive ZipArchiveEntry DeflateStream GZipStream 。In Windows 8.x Store apps, you work with compressed files by using the methods in ZipArchive, ZipArchiveEntry, DeflateStream, and GZipStream.

クラスには、 ZipFileExtensions を拡張する4つのメソッドが含まれてい ZipArchive ます。The ZipFileExtensions class contains four methods that extend ZipArchive:

• CreateEntryFromFile(ZipArchive, String, String)

• CreateEntryFromFile(ZipArchive, String, String, CompressionLevel)

• ExtractToDirectory(ZipArchive, String)

• ExtractToDirectory(ZipArchive, String, Boolean)

クラスには、 ZipFileExtensions を拡張する2つのメソッドが含まれてい ZipArchiveEntry ます。The ZipFileExtensions class contains two methods that extend ZipArchiveEntry:

• ExtractToFile(ZipArchiveEntry, String)

• ExtractToFile(ZipArchiveEntry, String, Boolean)

例Examples

次の例では、既存のファイルから zip アーカイブに新しいエントリを作成し、アーカイブの内容をディレクトリに抽出する方法を示します。The following example shows how to create a new entry in a zip archive from an existing file, and extract the contents of the archive to a directory.

using System;
using System.IO;
using System.IO.Compression;

namespace ConsoleApplication
{
    class Program
    {
        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);
            }
        }
    }
}

Imports System.IO
Imports System.IO.Compression

Module Module1

    Sub Main()
        Dim zipPath As String = "c:\users\exampleuser\end.zip"
        Dim extractPath As String = "c:\users\exampleuser\extract"
        Dim newFile As String = "c:\users\exampleuser\NewFile.txt"

        Using archive As ZipArchive = ZipFile.Open(zipPath, ZipArchiveMode.Update)
            archive.CreateEntryFromFile(newFile, "NewEntry.txt", CompressionLevel.Fastest)
            archive.ExtractToDirectory(extractPath)
        End Using
    End Sub

End Module

次の例は、zip アーカイブの内容を反復処理し、拡張子が .txt のファイルを抽出する方法を示しています。The following example shows how to iterate through the contents of a zip archive and extract files that have a .txt extension.

using System;
using System.IO;
using System.IO.Compression;

class Program
{
    static void Main(string[] args)
    {
        string zipPath = @".\result.zip";

        Console.WriteLine("Provide path where to extract the zip file:");
        string extractPath = Console.ReadLine();

        // Normalizes the path.
        extractPath = Path.GetFullPath(extractPath);

        // Ensures that the last character on the extraction path
        // is the directory separator char.
        // Without this, a malicious zip file could try to traverse outside of the expected
        // extraction path.
        if (!extractPath.EndsWith(Path.DirectorySeparatorChar.ToString(), StringComparison.Ordinal))
            extractPath += Path.DirectorySeparatorChar;

        using (ZipArchive archive = ZipFile.OpenRead(zipPath))
        {
            foreach (ZipArchiveEntry entry in archive.Entries)
            {
                if (entry.FullName.EndsWith(".txt", StringComparison.OrdinalIgnoreCase))
                {
                    // Gets the full path to ensure that relative segments are removed.
                    string destinationPath = Path.GetFullPath(Path.Combine(extractPath, entry.FullName));

                    // Ordinal match is safest, case-sensitive volumes can be mounted within volumes that
                    // are case-insensitive.
                    if (destinationPath.StartsWith(extractPath, StringComparison.Ordinal))
                        entry.ExtractToFile(destinationPath);
                }
            }
        }
    }
}

Imports System.IO
Imports System.IO.Compression

Module Module1

    Sub Main()
        Dim zipPath As String = ".\result.zip"

        Console.WriteLine("Provide path where to extract the zip file:")
        Dim extractPath As String = Console.ReadLine()

        ' Normalizes the path.
        extractPath = Path.GetFullPath(extractPath)

        ' Ensures that the last character on the extraction path
        ' is the directory separator char. 
        ' Without this, a malicious zip file could try to traverse outside of the expected
        ' extraction path.
        If Not extractPath.EndsWith(Path.DirectorySeparatorChar.ToString(), StringComparison.Ordinal) Then
            extractPath += Path.DirectorySeparatorChar
        End If

        Using archive As ZipArchive = ZipFile.OpenRead(zipPath)
            For Each entry As ZipArchiveEntry In archive.Entries
                If entry.FullName.EndsWith(".txt", StringComparison.OrdinalIgnoreCase) Then

                    ' Gets the full path to ensure that relative segments are removed.
                    Dim destinationPath As String = Path.GetFullPath(Path.Combine(extractPath, entry.FullName))
                    
                    ' Ordinal match is safest, case-sensitive volumes can be mounted within volumes that
                    ' are case-insensitive.
                    If destinationPath.StartsWith(extractPath, StringComparison.Ordinal) Then 
                        entry.ExtractToFile(destinationPath)
                    End If

                End If
            Next
        End Using
    End Sub

End Module

メソッド

適用対象