ZipFileExtensions.ExtractToFile Methode

Quelle:

ZipFileExtensions.ZipArchiveEntry.Extract.cs

Quelle:

ZipFileExtensions.ZipArchiveEntry.Extract.cs

Quelle:

ZipFileExtensions.ZipArchiveEntry.Extract.cs

public:
[System::Runtime::CompilerServices::Extension]
 static void ExtractToFile(System::IO::Compression::ZipArchiveEntry ^ source, System::String ^ destinationFileName);

public static void ExtractToFile (this System.IO.Compression.ZipArchiveEntry source, string destinationFileName);

static member ExtractToFile : System.IO.Compression.ZipArchiveEntry * string -> unit

<Extension()>
Public Sub ExtractToFile (source As ZipArchiveEntry, destinationFileName As String)

Parameter

Ausnahmen

Beispiele

Das folgende Beispiel zeigt, wie Sie den Inhalt einer ZIP-Archivdatei durchlaufen und Dateien mit einer .txt-Erweiterung extrahieren.

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

Hinweise

Wenn die Zieldatei bereits vorhanden ist, wird sie von dieser Methode nicht überschrieben. Es löst eine Ausnahme aus IOException . Um eine vorhandene Datei zu überschreiben, verwenden Sie stattdessen die ExtractToFile(ZipArchiveEntry, String, Boolean) Methodenüberladung.

Die letzte Schreibzeit der Datei wird auf die letzte Änderung des Eintrags im ZIP-Archiv festgelegt; Dieser Wert wird in der LastWriteTime -Eigenschaft gespeichert.

Sie können diese Methode nicht verwenden, um ein Verzeichnis zu extrahieren. verwenden Sie stattdessen die ExtractToDirectory -Methode.

Quelle:

ZipFileExtensions.ZipArchiveEntry.Extract.cs

Quelle:

ZipFileExtensions.ZipArchiveEntry.Extract.cs

Quelle:

ZipFileExtensions.ZipArchiveEntry.Extract.cs

public:
[System::Runtime::CompilerServices::Extension]
 static void ExtractToFile(System::IO::Compression::ZipArchiveEntry ^ source, System::String ^ destinationFileName, bool overwrite);

public static void ExtractToFile (this System.IO.Compression.ZipArchiveEntry source, string destinationFileName, bool overwrite);

static member ExtractToFile : System.IO.Compression.ZipArchiveEntry * string * bool -> unit

<Extension()>
Public Sub ExtractToFile (source As ZipArchiveEntry, destinationFileName As String, overwrite As Boolean)

Parameter

Ausnahmen

Beispiele

Im folgenden Beispiel wird gezeigt, wie Sie den Inhalt einer ZIP-Archivdatei durchlaufen und Dateien mit einer .txt-Erweiterung extrahieren. Es überschreibt eine vorhandene Datei, die denselben Namen im Zielordner hat. Um dieses Codebeispiel zu kompilieren, müssen Sie auf die System.IO.Compression Assemblys und System.IO.Compression.FileSystem in Ihrem Projekt verweisen.

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            string zipPath = @"c:\example\start.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))
                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, true);
                    }
                }
            }
        }
    }
}

Imports System.IO
Imports System.IO.Compression

Module Module1

    Sub Main()
        Dim zipPath As String = "c:\example\start.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) 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, true)
                    End If

                End If
            Next
        End Using
    End Sub

End Module

Hinweise

Die letzte Schreibzeit der Datei wird auf die letzte Änderung des Eintrags im ZIP-Archiv festgelegt; Dieser Wert wird in der LastWriteTime -Eigenschaft gespeichert.

Sie können diese Methode nicht verwenden, um ein Verzeichnis zu extrahieren. verwenden Sie stattdessen die ExtractToDirectory -Methode.