ZipInputStream Constructor (fileName)

DotNetZip

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Ionic Zip Library v1.9.1.6 ZipInputStream Constructor (fileName)

Create a ZipInputStream, given the name of an existing zip file.

Declaration Syntax

Visual Basic

Visual C++

public ZipInputStream(
	string fileName
)

Public Sub New ( _
	fileName As String _
)

public:
ZipInputStream(
	String^ fileName
)

Parameters

fileName (String): The name of the filesystem file to read.

Remarks

This constructor opens a FileStream for the given zipfile, and wraps a ZipInputStream around that. See the documentation for the ZipInputStream(Stream) constructor for full details.

While the ZipFile class is generally easier to use, this class provides an alternative to those applications that want to read from a zipfile directly, using a Stream.

Examples

This example shows how to read a zip file, and extract entries, using the ZipInputStream class.

CopyC#

private void Unzip()
{
    byte[] buffer= new byte[2048];
    int n;
    using (var input= new ZipInputStream(inputFileName))
    {
        ZipEntry e;
        while (( e = input.GetNextEntry()) != null)
        {
            if (e.IsDirectory) continue;
            string outputPath = Path.Combine(extractDir, e.FileName);
            using (var output = File.Open(outputPath, FileMode.Create, FileAccess.ReadWrite))
            {
                while ((n= input.Read(buffer, 0, buffer.Length)) > 0)
                {
                    output.Write(buffer,0,n);
                }
            }
        }
    }
}

CopyVB.NET

Private Sub UnZip()
    Dim inputFileName As String = "MyArchive.zip"
    Dim extractDir As String = "extract"
    Dim buffer As Byte() = New Byte(2048) {}
    Using input As ZipInputStream = New ZipInputStream(inputFileName)
        Dim e As ZipEntry
        Do While (Not e = input.GetNextEntry Is Nothing)
            If Not e.IsDirectory Then
                Using output As FileStream = File.Open(Path.Combine(extractDir, e.FileName), _
                                                       FileMode.Create, FileAccess.ReadWrite)
                    Dim n As Integer
                    Do While (n = input.Read(buffer, 0, buffer.Length) > 0)
                        output.Write(buffer, 0, n)
                    Loop
                End Using
            End If
        Loop
    End Using
End Sub

Assembly: Ionic.Zip (Module: Ionic.Zip) Version: 1.9.1.8 (1.9.1.8)

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