ZipFile.OpenRead(String) Method
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Opens a zip archive for reading at the specified path.
public:
static System::IO::Compression::ZipArchive ^ OpenRead(System::String ^ archiveFileName);public static System.IO.Compression.ZipArchive OpenRead(string archiveFileName);static member OpenRead : string -> System.IO.Compression.ZipArchivePublic Shared Function OpenRead (archiveFileName As String) As ZipArchive- archiveFileName
- String
The path to the archive to open, specified as a relative or absolute path. A relative path is interpreted as relative to the current working directory.
The opened zip archive.
archiveFileName is Empty, contains only white space, or contains at least one invalid character.
archiveFileName is null.
In archiveFileName, the specified path, file name, or both exceed the system-defined maximum length.
archiveFileName is invalid or does not exist (for example, it is on an unmapped drive).
archiveFileName could not be opened.
-or-
An unspecified I/O error occurred while opening the file.
archiveFileName specifies a directory.
-or-
The caller does not have the required permission to access the file specified in archiveFileName.
The file specified in archiveFileName is not found.
archiveFileName contains an invalid format.
archiveFileName could not be interpreted as a zip archive.
The following example shows how to open a zip archive for reading.
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);
}
}
}
}
}
open System
open System.IO;
open System.IO.Compression;
[<EntryPoint>]
let main _ =
let zipPath = @".\result.zip"
printfn "Provide path where to extract the zip file:"
let extractPath = stdin.ReadLine();
// Normalizes the path.
let mutable 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) |> not then
extractPath <- extractPath + string Path.DirectorySeparatorChar
use archive = ZipFile.OpenRead zipPath
for entry in archive.Entries do
if entry.FullName.EndsWith(".txt", StringComparison.OrdinalIgnoreCase) then
// Gets the full path to ensure that relative segments are removed.
let 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) then
entry.ExtractToFile destinationPath
0
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
This method is equivalent to calling the Open method and setting the mode parameter to Read. The archive is opened with FileMode.Open as the file mode value. If the archive does not exist, a FileNotFoundException exception is thrown.
| Termék | Verziók |
|---|---|
| .NET | Core 1.0, Core 1.1, Core 2.0, Core 2.1, Core 2.2, Core 3.0, Core 3.1, 5, 6, 7, 8, 9, 10 |
| .NET Framework | 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1 |
| .NET Standard | 1.3, 1.4, 1.6, 2.0, 2.1 |
| UWP | 10.0 |
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