DeflateStream Konstruktor

Referensi

Definisi

Ruang nama:: System.IO.Compression

Rakitan:: System.IO.Compression.dll

Rakitan:: System.dll

Rakitan:: netstandard.dll

Penting

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Menginisialisasi instans baru kelas DeflateStream.

Overload

DeflateStream(Stream, CompressionLevel)	Menginisialisasi instans baru kelas DeflateStream dengan menggunakan tingkat aliran dan kompresi yang ditentukan.
DeflateStream(Stream, CompressionMode)	Menginisialisasi instans baru kelas DeflateStream dengan menggunakan mode aliran dan kompresi yang ditentukan.
DeflateStream(Stream, CompressionLevel, Boolean)	Menginisialisasi instans baru kelas DeflateStream dengan menggunakan tingkat aliran dan kompresi yang ditentukan, dan secara opsional membiarkan aliran terbuka.
DeflateStream(Stream, CompressionMode, Boolean)	Menginisialisasi instans baru kelas DeflateStream dengan menggunakan mode aliran dan kompresi yang ditentukan, dan secara opsional membiarkan aliran terbuka.
DeflateStream(Stream, ZLibCompressionOptions, Boolean)	Menginisialisasi instans baru kelas DeflateStream dengan menggunakan aliran yang ditentukan, opsi pemadatan, dan secara opsional membiarkan aliran terbuka.

Keterangan

Menggunakan kelas DeflateStream untuk mengompresi file yang lebih besar dari 4 GB akan menyebabkan pengecualian.

DeflateStream(Stream, CompressionLevel)

Sumber:: DeflateStream.cs

Sumber:: DeflateStream.cs

Sumber:: DeflateStream.cs

Menginisialisasi instans baru kelas DeflateStream dengan menggunakan tingkat aliran dan kompresi yang ditentukan.

public:
 DeflateStream(System::IO::Stream ^ stream, System::IO::Compression::CompressionLevel compressionLevel);

public DeflateStream (System.IO.Stream stream, System.IO.Compression.CompressionLevel compressionLevel);

new System.IO.Compression.DeflateStream : System.IO.Stream * System.IO.Compression.CompressionLevel -> System.IO.Compression.DeflateStream

Public Sub New (stream As Stream, compressionLevel As CompressionLevel)

Parameter

stream: Stream

Aliran tempat data terkompresi ditulis.

compressionLevel: CompressionLevel

Salah satu nilai enumerasi yang menunjukkan apakah akan menekankan kecepatan atau efisiensi pemadatan saat mengompresi data ke aliran.

Pengecualian

ArgumentNullException

stream null.

ArgumentException

Aliran tidak mendukung operasi tulis seperti pemadatan. (Properti CanWrite pada objek stream false.)

Keterangan

Anda menggunakan konstruktor ini ketika Anda ingin menentukan apakah efisiensi atau kecepatan kompresi lebih penting untuk instans kelas DeflateStream.

Overload konstruktor ini menggunakan mode kompresi Compress. Untuk mengatur mode kompresi ke nilai lain, gunakan DeflateStream(Stream, CompressionMode) atau DeflateStream(Stream, CompressionMode, Boolean) kelebihan beban.

Contoh

Contoh berikut menunjukkan cara mengatur tingkat kompresi saat membuat objek DeflateStream dan cara membiarkan aliran terbuka.

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

public static class FileCompressionLevelExample
{
    private const string Message = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.";
    private const string OriginalFileName = "original.txt";
    private const string CompressedFileName = "compressed.dfl";

    public static void Run()
    {
        CreateFileToCompress();
        CompressFile();
        PrintResults();
        DeleteFiles();

        /*
         Output:
            The original file 'original.txt' is 445 bytes.
            The compressed file 'compressed.dfl' is 259 bytes.
         */
    }

    private static void CreateFileToCompress() => File.WriteAllText(OriginalFileName, Message);

    private static void CompressFile()
    {
        using FileStream originalFileStream = File.Open(OriginalFileName, FileMode.Open);
        using FileStream compressedFileStream = File.Create(CompressedFileName);
        using var compressor = new DeflateStream(compressedFileStream, CompressionLevel.Fastest);
        originalFileStream.CopyTo(compressor);
    }

    private static void PrintResults()
    {
        long originalSize = new FileInfo(OriginalFileName).Length;
        long compressedSize = new FileInfo(CompressedFileName).Length;

        Console.WriteLine($"The original file '{OriginalFileName}' is {originalSize} bytes.");
        Console.WriteLine($"The compressed file '{CompressedFileName}' is {compressedSize} bytes.");
    }

    private static void DeleteFiles()
    {
        File.Delete(OriginalFileName);
        File.Delete(CompressedFileName);
    }
}

Imports System.IO
Imports System.IO.Compression

Module FileCompressionLevelExample
    Private Const Message As String = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."
    Private Const OriginalFileName As String = "original.txt"
    Private Const CompressedFileName As String = "compressed.dfl"

    Sub Main()
        CreateFileToCompress()
        CompressFile()
        PrintResults()
        DeleteFiles()

        'Output:
        '   The original file 'original.txt' weighs 445 bytes.
        '   The compressed file 'compressed.dfl' weighs 259 bytes.
    End Sub

    Private Sub CreateFileToCompress()
        File.WriteAllText(OriginalFileName, Message)
    End Sub

    Private Sub CompressFile()
        Using originalFileStream As FileStream = File.Open(OriginalFileName, FileMode.Open)
            Using compressedFileStream As FileStream = File.Create(CompressedFileName)
                Using compressor = New DeflateStream(compressedFileStream, CompressionLevel.Fastest)
                    originalFileStream.CopyTo(compressor)
                End Using
            End Using
        End Using
    End Sub

    Private Sub PrintResults()
        Dim originalSize As Long = New FileInfo(OriginalFileName).Length
        Dim compressedSize As Long = New FileInfo(CompressedFileName).Length

        Console.WriteLine($"The original file '{OriginalFileName}' weighs {originalSize} bytes.")
        Console.WriteLine($"The compressed file '{CompressedFileName}' weighs {compressedSize} bytes.")
    End Sub

    Private Sub DeleteFiles()
        File.Delete(OriginalFileName)
        File.Delete(CompressedFileName)
    End Sub
End Module

Berlaku untuk

DeflateStream(Stream, CompressionMode)

Sumber:: DeflateStream.cs

Sumber:: DeflateStream.cs

Sumber:: DeflateStream.cs

Menginisialisasi instans baru kelas DeflateStream dengan menggunakan mode aliran dan kompresi yang ditentukan.

public:
 DeflateStream(System::IO::Stream ^ stream, System::IO::Compression::CompressionMode mode);

public DeflateStream (System.IO.Stream stream, System.IO.Compression.CompressionMode mode);

new System.IO.Compression.DeflateStream : System.IO.Stream * System.IO.Compression.CompressionMode -> System.IO.Compression.DeflateStream

Public Sub New (stream As Stream, mode As CompressionMode)

Parameter

stream: Stream

Aliran tempat data terkompresi ditulis atau dari data mana yang akan didekompresi dibaca.

mode: CompressionMode

Salah satu nilai enumerasi yang menunjukkan apakah akan mengompresi data ke aliran atau mendekompresi data dari aliran.

Pengecualian

ArgumentNullException

stream null.

ArgumentException

mode bukan nilai CompressionMode yang valid.

-atau-

CompressionMode Compress dan CanWritefalse.

-atau-

CompressionMode Decompress dan CanReadfalse.

Keterangan

Secara default, DeflateStream memiliki aliran yang mendasar, jadi menutup aliran juga menutup aliran yang mendasar. Perhatikan bahwa status aliran yang mendasar dapat memengaruhi kegunaan aliran. Selain itu, tidak ada pemeriksaan eksplisit yang dilakukan, jadi tidak ada pengecualian tambahan yang dilemparkan saat instans baru dibuat.

Jika instans kelas DeflateStream dibuat dengan parameter mode sama dengan Compress, informasi header segera disisipkan. Jika tidak ada tindakan lebih lanjut yang terjadi, aliran muncul sebagai file terkompresi yang valid, kosong, dan terkompresi.

Menggunakan kelas DeflateStream untuk mengompresi file yang lebih besar dari 4 GB menimbulkan pengecualian.

Secara default, tingkat kompresi diatur ke Optimal ketika mode kompresi Compress.

Contoh

Contoh berikut menunjukkan cara menggunakan kelas DeflateStream untuk mengompresi dan mendekompresi file.

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

public static class FileCompressionModeExample
{
    private const string Message = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.";
    private const string OriginalFileName = "original.txt";
    private const string CompressedFileName = "compressed.dfl";
    private const string DecompressedFileName = "decompressed.txt";

    public static void Run()
    {
        CreateFileToCompress();
        CompressFile();
        DecompressFile();
        PrintResults();
        DeleteFiles();

        /*
         Output:

            The original file 'original.txt' is 445 bytes. Contents: "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."

            The compressed file 'compressed.dfl' is 265 bytes.

            The decompressed file 'decompressed.txt' is 445 bytes. Contents: "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."
         */
    }

    private static void CreateFileToCompress() => File.WriteAllText(OriginalFileName, Message);

    private static void CompressFile()
    {
        using FileStream originalFileStream = File.Open(OriginalFileName, FileMode.Open);
        using FileStream compressedFileStream = File.Create(CompressedFileName);
        using var compressor = new DeflateStream(compressedFileStream, CompressionMode.Compress);
        originalFileStream.CopyTo(compressor);
    }

    private static void DecompressFile()
    {
        using FileStream compressedFileStream = File.Open(CompressedFileName, FileMode.Open);
        using FileStream outputFileStream = File.Create(DecompressedFileName);
        using var decompressor = new DeflateStream(compressedFileStream, CompressionMode.Decompress);
        decompressor.CopyTo(outputFileStream);
    }

    private static void PrintResults()
    {
        long originalSize = new FileInfo(OriginalFileName).Length;
        long compressedSize = new FileInfo(CompressedFileName).Length;
        long decompressedSize = new FileInfo(DecompressedFileName).Length;

        Console.WriteLine($"The original file '{OriginalFileName}' is {originalSize} bytes. Contents: \"{File.ReadAllText(OriginalFileName)}\"");
        Console.WriteLine($"The compressed file '{CompressedFileName}' is {compressedSize} bytes.");
        Console.WriteLine($"The decompressed file '{DecompressedFileName}' is {decompressedSize} bytes. Contents: \"{File.ReadAllText(DecompressedFileName)}\"");
    }

    private static void DeleteFiles()
    {
        File.Delete(OriginalFileName);
        File.Delete(CompressedFileName);
        File.Delete(DecompressedFileName);
    }
}

Imports System.IO
Imports System.IO.Compression

Module FileCompressionModeExample
    Private Const Message As String = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."
    Private Const OriginalFileName As String = "original.txt"
    Private Const CompressedFileName As String = "compressed.dfl"
    Private Const DecompressedFileName As String = "decompressed.txt"

    Sub Main()
        CreateFileToCompress()
        CompressFile()
        DecompressFile()
        PrintResults()
        DeleteFiles()

        'Output:

        '   The original file 'original.txt' weighs 445 bytes. Contents: "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."

        '   The compressed file 'compressed.dfl' weighs 265 bytes.

        '   The decompressed file 'decompressed.txt' weighs 445 bytes. Contents: "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."

    End Sub

    Private Sub CreateFileToCompress()
        File.WriteAllText(OriginalFileName, Message)
    End Sub

    Private Sub CompressFile()
        Using originalFileStream As FileStream = File.Open(OriginalFileName, FileMode.Open)
            Using compressedFileStream As FileStream = File.Create(CompressedFileName)
                Using compressor = New DeflateStream(compressedFileStream, CompressionMode.Compress)
                    originalFileStream.CopyTo(compressor)
                End Using
            End Using
        End Using
    End Sub

    Private Sub DecompressFile()
        Using compressedFileStream As FileStream = File.Open(CompressedFileName, FileMode.Open)
            Using outputFileStream As FileStream = File.Create(DecompressedFileName)
                Using decompressor = New DeflateStream(compressedFileStream, CompressionMode.Decompress)
                    decompressor.CopyTo(outputFileStream)
                End Using
            End Using
        End Using
    End Sub

    Private Sub PrintResults()
        Dim originalSize As Long = New FileInfo(OriginalFileName).Length
        Dim compressedSize As Long = New FileInfo(CompressedFileName).Length
        Dim decompressedSize As Long = New FileInfo(DecompressedFileName).Length

        Console.WriteLine($"The original file '{OriginalFileName}' weighs {originalSize} bytes. Contents: ""{File.ReadAllText(OriginalFileName)}""")
        Console.WriteLine($"The compressed file '{CompressedFileName}' weighs {compressedSize} bytes.")
        Console.WriteLine($"The decompressed file '{DecompressedFileName}' weighs {decompressedSize} bytes. Contents: ""{File.ReadAllText(DecompressedFileName)}""")
    End Sub

    Private Sub DeleteFiles()
        File.Delete(OriginalFileName)
        File.Delete(CompressedFileName)
        File.Delete(DecompressedFileName)
    End Sub
End Module

Berlaku untuk

DeflateStream(Stream, CompressionLevel, Boolean)

Sumber:: DeflateStream.cs

Sumber:: DeflateStream.cs

Sumber:: DeflateStream.cs

Menginisialisasi instans baru kelas DeflateStream dengan menggunakan tingkat aliran dan kompresi yang ditentukan, dan secara opsional membiarkan aliran terbuka.

public:
 DeflateStream(System::IO::Stream ^ stream, System::IO::Compression::CompressionLevel compressionLevel, bool leaveOpen);

public DeflateStream (System.IO.Stream stream, System.IO.Compression.CompressionLevel compressionLevel, bool leaveOpen);

new System.IO.Compression.DeflateStream : System.IO.Stream * System.IO.Compression.CompressionLevel * bool -> System.IO.Compression.DeflateStream

Public Sub New (stream As Stream, compressionLevel As CompressionLevel, leaveOpen As Boolean)

Parameter

stream: Stream

Aliran tempat data terkompresi ditulis.

compressionLevel: CompressionLevel

Salah satu nilai enumerasi yang menunjukkan apakah akan menekankan kecepatan atau efisiensi pemadatan saat mengompresi data ke aliran.

leaveOpen: Boolean

true membiarkan objek stream terbuka setelah membuang objek DeflateStream; jika tidak, false.

Pengecualian

ArgumentNullException

stream null.

ArgumentException

Aliran tidak mendukung operasi tulis seperti pemadatan. (Properti CanWrite pada objek stream false.)

Keterangan

Anda menggunakan konstruktor ini ketika Anda ingin menentukan apakah efisiensi atau kecepatan kompresi lebih penting untuk instans kelas DeflateStream, dan apakah akan membiarkan objek stream terbuka setelah membuang objek DeflateStream.

Contoh

Contoh berikut menunjukkan cara mengatur tingkat kompresi saat membuat objek DeflateStream dan cara membiarkan aliran terbuka.

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

public static class FileCompressionLevelExample
{
    private const string Message = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.";
    private const string OriginalFileName = "original.txt";
    private const string CompressedFileName = "compressed.dfl";

    public static void Run()
    {
        CreateFileToCompress();
        CompressFile();
        PrintResults();
        DeleteFiles();

        /*
         Output:
            The original file 'original.txt' is 445 bytes.
            The compressed file 'compressed.dfl' is 259 bytes.
         */
    }

    private static void CreateFileToCompress() => File.WriteAllText(OriginalFileName, Message);

    private static void CompressFile()
    {
        using FileStream originalFileStream = File.Open(OriginalFileName, FileMode.Open);
        using FileStream compressedFileStream = File.Create(CompressedFileName);
        using var compressor = new DeflateStream(compressedFileStream, CompressionLevel.Fastest);
        originalFileStream.CopyTo(compressor);
    }

    private static void PrintResults()
    {
        long originalSize = new FileInfo(OriginalFileName).Length;
        long compressedSize = new FileInfo(CompressedFileName).Length;

        Console.WriteLine($"The original file '{OriginalFileName}' is {originalSize} bytes.");
        Console.WriteLine($"The compressed file '{CompressedFileName}' is {compressedSize} bytes.");
    }

    private static void DeleteFiles()
    {
        File.Delete(OriginalFileName);
        File.Delete(CompressedFileName);
    }
}

Imports System.IO
Imports System.IO.Compression

Module FileCompressionLevelExample
    Private Const Message As String = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."
    Private Const OriginalFileName As String = "original.txt"
    Private Const CompressedFileName As String = "compressed.dfl"

    Sub Main()
        CreateFileToCompress()
        CompressFile()
        PrintResults()
        DeleteFiles()

        'Output:
        '   The original file 'original.txt' weighs 445 bytes.
        '   The compressed file 'compressed.dfl' weighs 259 bytes.
    End Sub

    Private Sub CreateFileToCompress()
        File.WriteAllText(OriginalFileName, Message)
    End Sub

    Private Sub CompressFile()
        Using originalFileStream As FileStream = File.Open(OriginalFileName, FileMode.Open)
            Using compressedFileStream As FileStream = File.Create(CompressedFileName)
                Using compressor = New DeflateStream(compressedFileStream, CompressionLevel.Fastest)
                    originalFileStream.CopyTo(compressor)
                End Using
            End Using
        End Using
    End Sub

    Private Sub PrintResults()
        Dim originalSize As Long = New FileInfo(OriginalFileName).Length
        Dim compressedSize As Long = New FileInfo(CompressedFileName).Length

        Console.WriteLine($"The original file '{OriginalFileName}' weighs {originalSize} bytes.")
        Console.WriteLine($"The compressed file '{CompressedFileName}' weighs {compressedSize} bytes.")
    End Sub

    Private Sub DeleteFiles()
        File.Delete(OriginalFileName)
        File.Delete(CompressedFileName)
    End Sub
End Module

Berlaku untuk

DeflateStream(Stream, CompressionMode, Boolean)

Sumber:: DeflateStream.cs

Sumber:: DeflateStream.cs

Sumber:: DeflateStream.cs

Menginisialisasi instans baru kelas DeflateStream dengan menggunakan mode aliran dan kompresi yang ditentukan, dan secara opsional membiarkan aliran terbuka.

public:
 DeflateStream(System::IO::Stream ^ stream, System::IO::Compression::CompressionMode mode, bool leaveOpen);

public DeflateStream (System.IO.Stream stream, System.IO.Compression.CompressionMode mode, bool leaveOpen);

new System.IO.Compression.DeflateStream : System.IO.Stream * System.IO.Compression.CompressionMode * bool -> System.IO.Compression.DeflateStream

Public Sub New (stream As Stream, mode As CompressionMode, leaveOpen As Boolean)

Parameter

stream: Stream

Aliran tempat data terkompresi ditulis atau dari data mana yang akan didekompresi dibaca.

mode: CompressionMode

Salah satu nilai enumerasi yang menunjukkan apakah akan mengompresi data ke aliran atau mendekompresi data dari aliran.

leaveOpen: Boolean

true membiarkan aliran terbuka setelah membuang objek DeflateStream; jika tidak, false.

Pengecualian

ArgumentNullException

stream null.

ArgumentException

mode bukan nilai CompressionMode yang valid.

-atau-

CompressionMode Compress dan CanWritefalse.

-atau-

CompressionMode Decompress dan CanReadfalse.

Keterangan

Menggunakan kelas DeflateStream untuk mengompresi file yang lebih besar dari 4 GB menimbulkan pengecualian.

Secara default, tingkat kompresi diatur ke Optimal ketika mode kompresi Compress.

Contoh

Contoh berikut menunjukkan cara menggunakan kelas DeflateStream untuk mengompresi dan mendekompresi file.

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

public static class FileCompressionModeExample
{
    private const string Message = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.";
    private const string OriginalFileName = "original.txt";
    private const string CompressedFileName = "compressed.dfl";
    private const string DecompressedFileName = "decompressed.txt";

    public static void Run()
    {
        CreateFileToCompress();
        CompressFile();
        DecompressFile();
        PrintResults();
        DeleteFiles();

        /*
         Output:

            The original file 'original.txt' is 445 bytes. Contents: "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."

            The compressed file 'compressed.dfl' is 265 bytes.

            The decompressed file 'decompressed.txt' is 445 bytes. Contents: "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."
         */
    }

    private static void CreateFileToCompress() => File.WriteAllText(OriginalFileName, Message);

    private static void CompressFile()
    {
        using FileStream originalFileStream = File.Open(OriginalFileName, FileMode.Open);
        using FileStream compressedFileStream = File.Create(CompressedFileName);
        using var compressor = new DeflateStream(compressedFileStream, CompressionMode.Compress);
        originalFileStream.CopyTo(compressor);
    }

    private static void DecompressFile()
    {
        using FileStream compressedFileStream = File.Open(CompressedFileName, FileMode.Open);
        using FileStream outputFileStream = File.Create(DecompressedFileName);
        using var decompressor = new DeflateStream(compressedFileStream, CompressionMode.Decompress);
        decompressor.CopyTo(outputFileStream);
    }

    private static void PrintResults()
    {
        long originalSize = new FileInfo(OriginalFileName).Length;
        long compressedSize = new FileInfo(CompressedFileName).Length;
        long decompressedSize = new FileInfo(DecompressedFileName).Length;

        Console.WriteLine($"The original file '{OriginalFileName}' is {originalSize} bytes. Contents: \"{File.ReadAllText(OriginalFileName)}\"");
        Console.WriteLine($"The compressed file '{CompressedFileName}' is {compressedSize} bytes.");
        Console.WriteLine($"The decompressed file '{DecompressedFileName}' is {decompressedSize} bytes. Contents: \"{File.ReadAllText(DecompressedFileName)}\"");
    }

    private static void DeleteFiles()
    {
        File.Delete(OriginalFileName);
        File.Delete(CompressedFileName);
        File.Delete(DecompressedFileName);
    }
}

Imports System.IO
Imports System.IO.Compression

Module FileCompressionModeExample
    Private Const Message As String = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."
    Private Const OriginalFileName As String = "original.txt"
    Private Const CompressedFileName As String = "compressed.dfl"
    Private Const DecompressedFileName As String = "decompressed.txt"

    Sub Main()
        CreateFileToCompress()
        CompressFile()
        DecompressFile()
        PrintResults()
        DeleteFiles()

        'Output:

        '   The original file 'original.txt' weighs 445 bytes. Contents: "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."

        '   The compressed file 'compressed.dfl' weighs 265 bytes.

        '   The decompressed file 'decompressed.txt' weighs 445 bytes. Contents: "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."

    End Sub

    Private Sub CreateFileToCompress()
        File.WriteAllText(OriginalFileName, Message)
    End Sub

    Private Sub CompressFile()
        Using originalFileStream As FileStream = File.Open(OriginalFileName, FileMode.Open)
            Using compressedFileStream As FileStream = File.Create(CompressedFileName)
                Using compressor = New DeflateStream(compressedFileStream, CompressionMode.Compress)
                    originalFileStream.CopyTo(compressor)
                End Using
            End Using
        End Using
    End Sub

    Private Sub DecompressFile()
        Using compressedFileStream As FileStream = File.Open(CompressedFileName, FileMode.Open)
            Using outputFileStream As FileStream = File.Create(DecompressedFileName)
                Using decompressor = New DeflateStream(compressedFileStream, CompressionMode.Decompress)
                    decompressor.CopyTo(outputFileStream)
                End Using
            End Using
        End Using
    End Sub

    Private Sub PrintResults()
        Dim originalSize As Long = New FileInfo(OriginalFileName).Length
        Dim compressedSize As Long = New FileInfo(CompressedFileName).Length
        Dim decompressedSize As Long = New FileInfo(DecompressedFileName).Length

        Console.WriteLine($"The original file '{OriginalFileName}' weighs {originalSize} bytes. Contents: ""{File.ReadAllText(OriginalFileName)}""")
        Console.WriteLine($"The compressed file '{CompressedFileName}' weighs {compressedSize} bytes.")
        Console.WriteLine($"The decompressed file '{DecompressedFileName}' weighs {decompressedSize} bytes. Contents: ""{File.ReadAllText(DecompressedFileName)}""")
    End Sub

    Private Sub DeleteFiles()
        File.Delete(OriginalFileName)
        File.Delete(CompressedFileName)
        File.Delete(DecompressedFileName)
    End Sub
End Module

Berlaku untuk

DeflateStream(Stream, ZLibCompressionOptions, Boolean)

Menginisialisasi instans baru kelas DeflateStream dengan menggunakan aliran yang ditentukan, opsi pemadatan, dan secara opsional membiarkan aliran terbuka.

public DeflateStream (System.IO.Stream stream, System.IO.Compression.ZLibCompressionOptions compressionOptions, bool leaveOpen = false);

new System.IO.Compression.DeflateStream : System.IO.Stream * System.IO.Compression.ZLibCompressionOptions * bool -> System.IO.Compression.DeflateStream

Public Sub New (stream As Stream, compressionOptions As ZLibCompressionOptions, Optional leaveOpen As Boolean = false)

Parameter

stream: Stream

Aliran tempat data terkompresi ditulis.

compressionOptions: ZLibCompressionOptions

Opsi untuk menyempurnakan aliran kompresi.

leaveOpen: Boolean

true membiarkan objek stream terbuka setelah membuang objek DeflateStream; jika tidak, false

Pengecualian

ArgumentNullException

stream atau compressionOptionsnull.

Berlaku untuk

Bagikan melalui

DeflateStream Konstruktor

Definisi

Overload

Keterangan

DeflateStream(Stream, CompressionLevel)

Parameter

Pengecualian

Keterangan

Contoh

Berlaku untuk

DeflateStream(Stream, CompressionMode)

Parameter

Pengecualian

Keterangan

Contoh

Berlaku untuk

DeflateStream(Stream, CompressionLevel, Boolean)

Parameter

Pengecualian

Keterangan

Contoh

Berlaku untuk

DeflateStream(Stream, CompressionMode, Boolean)

Parameter

Pengecualian

Keterangan

Contoh

Berlaku untuk

DeflateStream(Stream, ZLibCompressionOptions, Boolean)

Parameter

Pengecualian

Berlaku untuk

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