DeflateStream クラス
アセンブリ: System (system.dll 内)


このクラスは、デフレート アルゴリズムを表します。これは、損失のないファイル圧縮および圧縮解除を実現する業界標準のアルゴリズムです。このアルゴリズムでは、LZ77 アルゴリズムと Huffman コーディングを併用します。順次提供される不特定の長さの入力データ ストリームに対しても、あらかじめバインドされた量の中間ストレージのみを使用して、データの生成と処理が行うことができます。この形式は、特許に抵触することなく簡単に実装できます。詳細については、RFC 1951 『DEFLATE Compressed Data Format Specification version 1.3』を参照してください。このクラスは、サイズが 4 GB を超えるファイルの圧縮には使用できません。

DeflateStream クラスを使用して、ファイルの圧縮および圧縮解除を実行するコード例を次に示します。
Imports System Imports System.IO Imports System.IO.Compression Public Class DeflateTest Shared msg As String Public Shared Function ReadAllBytesFromStream(stream As Stream, buffer() As Byte) As Integer ' Use this method is used to read all bytes from a stream. Dim offset As Integer = 0 Dim totalCount As Integer = 0 While True Dim bytesRead As Integer = stream.Read(buffer, offset, 100) If bytesRead = 0 Then Exit While End If offset += bytesRead totalCount += bytesRead End While Return totalCount End Function 'ReadAllBytesFromStream Public Shared Function CompareData(buf1() As Byte, len1 As Integer, buf2() As Byte, len2 As Integer) As Boolean ' Use this method to compare data from two different buffers. If len1 <> len2 Then msg = "Number of bytes in two buffer are different" & len1 & ":" & len2 MsgBox(msg) Return False End If Dim i As Integer For i = 0 To len1 - 1 If buf1(i) <> buf2(i) Then msg = "byte " & i & " is different " & buf1(i) & "|" & buf2(i) MsgBox(msg) Return False End If Next i msg = "All bytes compare." MsgBox(msg) Return True End Function 'CompareData Public Shared Sub DeflateCompressDecompress(filename As String) msg = "Test compression and decompression on file " & filename MsgBox(msg) Dim infile As FileStream Try ' Open the file as a FileStream object. infile = New FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read) Dim buffer(infile.Length - 1) As Byte ' Read the file to ensure it is readable. Dim count As Integer = infile.Read(buffer, 0, buffer.Length) If count <> buffer.Length Then infile.Close() msg = "Test Failed: Unable to read data from file" MsgBox(msg) Return End If infile.Close() Dim ms As New MemoryStream() ' Use the newly created memory stream for the compressed data. Dim compressedzipStream As New DeflateStream(ms, CompressionMode.Compress, True) compressedzipStream.Write(buffer, 0, buffer.Length) ' Close the stream. compressedzipStream.Close() msg = "Original size: " & buffer.Length & ", Compressed size: " & ms.Length MsgBox(msg) ' Reset the memory stream position to begin decompression. ms.Position = 0 Dim zipStream As New DeflateStream(ms, CompressionMode.Decompress) Dim decompressedBuffer(buffer.Length + 100) As Byte ' Use the ReadAllBytesFromStream to read the stream. Dim totalCount As Integer = DeflateTest.ReadAllBytesFromStream(zipStream, decompressedBuffer) msg = "Decompressed " & totalCount & " bytes" MsgBox(msg) If Not DeflateTest.CompareData(buffer, buffer.Length, decompressedBuffer, totalCount) Then msg = "Error. The two buffers did not compare." MsgBox(msg) End If zipStream.Close() Catch e As Exception msg = "Error: The file being read contains invalid data." MsgBox(msg) End Try End Sub 'DeflateCompressDecompress Public Shared Sub Main(ByVal args() As String) Dim usageText As String = "Usage: DeflateTest <inputfilename>" 'If no file name is specified, write usage text. If args.Length = 0 Then Console.WriteLine(usageText) Else If File.Exists(args(0)) Then DeflateCompressDecompress(args(0)) End If End If End Sub 'Main End Class 'DeflateTest
using System; using System.IO; using System.IO.Compression; public class DeflateTest { public static int ReadAllBytesFromStream(Stream stream, byte[] buffer) { // Use this method is used to read all bytes from a stream. int offset = 0; int totalCount = 0; while (true) { int bytesRead = stream.Read(buffer, offset, 100); if ( bytesRead == 0) { break; } offset += bytesRead; totalCount += bytesRead; } return totalCount; } public static bool CompareData(byte[] buf1, int len1, byte[] buf2, int len2) { // Use this method to compare data from two different buffers. if (len1 != len2) { Console.WriteLine("Number of bytes in two buffer are different {0}:{1}", len1, len2); return false; } for ( int i= 0; i< len1; i++) { if ( buf1[i] != buf2[i]) { Console.WriteLine("byte {0} is different {1}|{2}", i, buf1[i], buf2[i]); return false; } } Console.WriteLine("All bytes compare."); return true; } public static void DeflateCompressDecompress(string filename) { Console.WriteLine("Test compression and decompression on file {0}", filename); FileStream infile; try { // Open the file as a FileStream object. infile = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read); byte[] buffer = new byte[infile.Length]; // Read the file to ensure it is readable. int count = infile.Read(buffer, 0, buffer.Length); if ( count != buffer.Length) { infile.Close(); Console.WriteLine("Test Failed: Unable to read data from file"); return; } infile.Close(); MemoryStream ms = new MemoryStream(); // Use the newly created memory stream for the compressed data. DeflateStream compressedzipStream = new DeflateStream(ms , CompressionMode.Compress, true); Console.WriteLine("Compression"); compressedzipStream.Write(buffer, 0, buffer.Length); // Close the stream. compressedzipStream.Close(); Console.WriteLine("Original size: {0}, Compressed size: {1}", buffer.Length, ms.Length); // Reset the memory stream position to begin decompression. ms.Position = 0; DeflateStream zipStream = new DeflateStream(ms, CompressionMode.Decompress); Console.WriteLine("Decompression"); byte[] decompressedBuffer = new byte[buffer.Length + 100]; // Use the ReadAllBytesFromStream to read the stream. int totalCount = DeflateTest.ReadAllBytesFromStream(zipStream, decompressedBuffer); Console.WriteLine("Decompressed {0} bytes", totalCount); if( !DeflateTest.CompareData(buffer, buffer.Length, decompressedBuffer, totalCount) ) { Console.WriteLine("Error. The two buffers did not compare."); } zipStream.Close(); } // end try catch (InvalidDataException) { Console.WriteLine("Error: The file being read contains invalid data."); } catch (FileNotFoundException) { Console.WriteLine("Error:The file specified was not found."); } catch (ArgumentException) { Console.WriteLine("Error: path is a zero-length string, contains only white space, or contains one or more invalid characters"); } catch (PathTooLongException) { Console.WriteLine("Error: The specified path, file name, or both exceed the system-defined maximum length. For example, on Windows-based platforms, paths must be less than 248 characters, and file names must be less than 260 characters."); } catch (DirectoryNotFoundException) { Console.WriteLine("Error: The specified path is invalid, such as being on an unmapped drive."); } catch (IOException) { Console.WriteLine("Error: An I/O error occurred while opening the file."); } catch (UnauthorizedAccessException) { Console.WriteLine("Error: path specified a file that is read-only, the path is a directory, or caller does not have the required permissions."); } catch (IndexOutOfRangeException) { Console.WriteLine("Error: You must provide parameters for MyGZIP."); } } public static void Main(string[] args) { string usageText = "Usage: DeflateTest <inputfilename>"; //If no file name is specified, write usage text. if (args.Length == 0) { Console.WriteLine(usageText); } else { if (File.Exists(args[0])) DeflateCompressDecompress(args[0]); } } }
#using <System.dll> using namespace System; using namespace System::IO; using namespace System::IO::Compression; int ReadAllBytesFromStream( Stream^ stream, array<Byte>^buffer ) { // Use this method is used to read all bytes from a stream. int offset = 0; int totalCount = 0; for ( ; ; ) { int bytesRead = stream->Read( buffer, offset, 100 ); if ( bytesRead == 0 ) { break; } offset += bytesRead; totalCount += bytesRead; } return totalCount; } bool CompareData( array<Byte>^buf1, int len1, array<Byte>^buf2, int len2 ) { // Use this method to compare data from two different buffers. if ( len1 != len2 ) { Console::WriteLine( "Number of bytes in two buffer are different {0}:{1}", len1, len2 ); return false; } for ( int i = 0; i < len1; i++ ) { if ( buf1[ i ] != buf2[ i ] ) { Console::WriteLine( "byte {0} is different {1}|{2}", i, buf1[ i ], buf2[ i ] ); return false; } } Console::WriteLine( "All bytes compare." ); return true; } void DeflateCompressDecompress( String^ filename ) { Console::WriteLine( "Test compression and decompression on file {0}", filename ); FileStream^ infile; try { // Open the file as a FileStream object. infile = gcnew FileStream( filename,FileMode::Open,FileAccess::Read,FileShare::Read ); array<Byte>^buffer = gcnew array<Byte>((int)infile->Length); // Read the file to ensure it is readable. int count = infile->Read( buffer, 0, buffer->Length ); if ( count != buffer->Length ) { infile->Close(); Console::WriteLine( "Test Failed: Unable to read data from file" ); return; } infile->Close(); MemoryStream^ ms = gcnew MemoryStream; // Use the newly created memory stream for the compressed data. DeflateStream ^ compressedzipStream = gcnew DeflateStream( ms,CompressionMode::Compress,true ); Console::WriteLine( "Compression" ); compressedzipStream->Write( buffer, 0, buffer->Length ); // Close the stream. compressedzipStream->Close(); Console::WriteLine( "Original size: {0}, Compressed size: {1}", buffer->Length, ms->Length ); // Reset the memory stream position to begin decompression. ms->Position = 0; DeflateStream ^ zipStream = gcnew DeflateStream( ms,CompressionMode::Decompress ); Console::WriteLine( "Decompression" ); array<Byte>^decompressedBuffer = gcnew array<Byte>(buffer->Length + 100); // Use the ReadAllBytesFromStream to read the stream. int totalCount = ReadAllBytesFromStream( zipStream, decompressedBuffer ); Console::WriteLine( "Decompressed {0} bytes", totalCount ); if ( !CompareData( buffer, buffer->Length, decompressedBuffer, totalCount ) ) { Console::WriteLine( "Error. The two buffers did not compare." ); } zipStream->Close(); } catch ( InvalidDataException ^ ) { Console::WriteLine( "Error: The file being read contains invalid data." ); } catch ( FileNotFoundException^ ) { Console::WriteLine( "Error:The file specified was not found." ); } catch ( ArgumentException^ ) { Console::WriteLine( "Error: path is a zero-length string, contains only white space, or contains one or more invalid characters" ); } catch ( PathTooLongException^ ) { Console::WriteLine( "Error: The specified path, file name, or both exceed the system-defined maximum length." " For example, on Windows-based platforms, paths must be less than 248 characters, and file names must be less than 260 characters." ); } catch ( DirectoryNotFoundException^ ) { Console::WriteLine( "Error: The specified path is invalid, such as being on an unmapped drive." ); } catch ( IOException^ ) { Console::WriteLine( "Error: An I/O error occurred while opening the file." ); } catch ( UnauthorizedAccessException^ ) { Console::WriteLine( "Error: path specified a file that is read-only, the path is a directory, or caller does not have the required permissions." ); } catch ( IndexOutOfRangeException^ ) { Console::WriteLine( "Error: You must provide parameters for MyGZIP." ); } } int main() { array<String^>^args = Environment::GetCommandLineArgs(); String^ usageText = "Usage: DeflateTest <inputfilename>"; //If no file name is specified, write usage text. if ( args->Length == 1 ) { Console::WriteLine( usageText ); } else { if ( File::Exists( args[ 1 ] ) ) DeflateCompressDecompress( args[ 1 ] ); } }
import System.*; import System.IO.*; import System.IO.Compression.*; public class DeflateTest { public static int ReadAllBytesFromStream(Stream stream, ubyte buffer[]) { // Use this method is used to read all bytes from a stream. int offSet = 0; int totalCount = 0; while (true) { int bytesRead = stream.Read(buffer, offSet, 100); if (bytesRead == 0) { break; } offSet += bytesRead; totalCount += bytesRead; } return totalCount; } //ReadAllBytesFromStream public static boolean CompareData(ubyte buf1[], int len1, ubyte buf2[], int len2) { // Use this method to compare data from two different buffers. if (len1 != len2) { Console.WriteLine("Number of bytes in two buffer are " + "different {0}:{1}", System.Convert.ToString(len1), System.Convert.ToString(len2)); return false; } for (int i = 0; i < len1; i++) { if (!(buf1.get_Item(i).Equals(buf2.get_Item(i)))) { Console.WriteLine("byte {0} is different {1}|{2}", System.Convert.ToString(i), System.Convert.ToString(buf1.get_Item(i)), System.Convert.ToString(buf2.get_Item(i))); return false; } } Console.WriteLine("All bytes compare."); return true; } //CompareData public static void DeflateCompressDecompress(String fileName) { Console.WriteLine("Test compression and decompression on file {0}" , fileName); FileStream inFile; try { // Open the file as a FileStream object. inFile = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read); ubyte buffer[] = new ubyte[(ubyte)inFile.get_Length()]; // Read the file to ensure it is readable. int count = inFile.Read(buffer, 0, buffer.length); if (count != buffer.length) { inFile.Close(); Console.WriteLine("Test Failed: Unable to read data from file"); return; } inFile.Close(); MemoryStream ms = new MemoryStream(); // Use the newly created memory stream for the compressed data. DeflateStream compressedZipStream = new DeflateStream(ms, CompressionMode.Compress, true); Console.WriteLine("Compression"); compressedZipStream.Write(buffer, 0, buffer.length); // Close the stream. compressedZipStream.Close(); Console.WriteLine("Original size: {0}, Compressed size: {1}", System.Convert.ToString(buffer.length), System.Convert.ToString(ms.get_Length())); // Reset the memory stream position to begin decompression. ms.set_Position(0); DeflateStream zipStream = new DeflateStream(ms, CompressionMode.Decompress); Console.WriteLine("Decompression"); ubyte decompressedBuffer[] = new ubyte[buffer.length + 100]; // Use the ReadAllBytesFromStream to read the stream. int totalCount = DeflateTest.ReadAllBytesFromStream(zipStream, decompressedBuffer); Console.WriteLine("Decompressed {0} bytes", System.Convert.ToString(totalCount)); if (!(DeflateTest.CompareData(buffer, buffer.length, decompressedBuffer, totalCount))) { Console.WriteLine("Error. The two buffers did not compare."); } zipStream.Close(); } catch (InvalidDataException exp) { Console.WriteLine("Error: The file being read contains" + " invalid data."); } catch (FileNotFoundException exp) { Console.WriteLine("Error:The file specified was not found."); } catch (ArgumentException exp) { Console.WriteLine("Error: path is a zero-length string, contains" + " only white space, or contains one or more " + "invalid characters"); } catch (PathTooLongException exp) { Console.WriteLine("Error: The specified path, file name, or both" + " exceed the system-defined maximum length. For example, " + "on Windows-based platforms, paths must be less than 248 " + "characters, and file names must be less than 260 " + "characters."); } catch (DirectoryNotFoundException exp) { Console.WriteLine("Error: The specified path is invalid, such" + " as being on an unmapped drive."); } catch (IOException exp) { Console.WriteLine("Error: An I/O error occurred while " + "opening the file."); } catch (UnauthorizedAccessException exp) { Console.WriteLine("Error: path specified a file that is read-only ," + " the path is a directory, or caller does not have the" + " required permissions."); } catch (IndexOutOfRangeException exp) { Console.WriteLine("Error: You must provide parameters for MyGZIP."); } } //DeflateCompressDecompress public static void main(String[] args) { String usageText = "Usage: DeflateTest <inputfilename>"; //If no file name is specified, write usage text. if (args.length == 0) { Console.WriteLine(usageText); } else { if (File.Exists(args[0])) { DeflateCompressDecompress(args[0]); } } } //main } //DeflateTest



Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


DeflateStream コンストラクタ (Stream, CompressionMode)
アセンブリ: System (system.dll 内)



既定では、DeflateStream が基になるストリームを所有しているため、ストリームを閉じると基になるストリームも閉じられます。基になるストリームの状態によっては、ストリームを使用できなくなることがあります。また、明示的なチェックは実行されないため、新しいインスタンスの作成時に追加の例外はスローされません。
Compress と等しい mode パラメータを使用して DeflateStream クラスのインスタンスが作成されると、ヘッダー情報が即座に挿入されます。それ以上のアクションが実行されないと、ストリームは有効な空の圧縮ファイルとして表示されます。

DeflateStream クラスを使用して、ファイルの圧縮および圧縮解除を実行するコード例を次に示します。
Imports System Imports System.IO Imports System.IO.Compression Public Class DeflateTest Shared msg As String Public Shared Function ReadAllBytesFromStream(stream As Stream, buffer() As Byte) As Integer ' Use this method is used to read all bytes from a stream. Dim offset As Integer = 0 Dim totalCount As Integer = 0 While True Dim bytesRead As Integer = stream.Read(buffer, offset, 100) If bytesRead = 0 Then Exit While End If offset += bytesRead totalCount += bytesRead End While Return totalCount End Function 'ReadAllBytesFromStream Public Shared Function CompareData(buf1() As Byte, len1 As Integer, buf2() As Byte, len2 As Integer) As Boolean ' Use this method to compare data from two different buffers. If len1 <> len2 Then msg = "Number of bytes in two buffer are different" & len1 & ":" & len2 MsgBox(msg) Return False End If Dim i As Integer For i = 0 To len1 - 1 If buf1(i) <> buf2(i) Then msg = "byte " & i & " is different " & buf1(i) & "|" & buf2(i) MsgBox(msg) Return False End If Next i msg = "All bytes compare." MsgBox(msg) Return True End Function 'CompareData Public Shared Sub DeflateCompressDecompress(filename As String) msg = "Test compression and decompression on file " & filename MsgBox(msg) Dim infile As FileStream Try ' Open the file as a FileStream object. infile = New FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read) Dim buffer(infile.Length - 1) As Byte ' Read the file to ensure it is readable. Dim count As Integer = infile.Read(buffer, 0, buffer.Length) If count <> buffer.Length Then infile.Close() msg = "Test Failed: Unable to read data from file" MsgBox(msg) Return End If infile.Close() Dim ms As New MemoryStream() ' Use the newly created memory stream for the compressed data. Dim compressedzipStream As New DeflateStream(ms, CompressionMode.Compress, True) compressedzipStream.Write(buffer, 0, buffer.Length) ' Close the stream. compressedzipStream.Close() msg = "Original size: " & buffer.Length & ", Compressed size: " & ms.Length MsgBox(msg) ' Reset the memory stream position to begin decompression. ms.Position = 0 Dim zipStream As New DeflateStream(ms, CompressionMode.Decompress) Dim decompressedBuffer(buffer.Length + 100) As Byte ' Use the ReadAllBytesFromStream to read the stream. Dim totalCount As Integer = DeflateTest.ReadAllBytesFromStream(zipStream, decompressedBuffer) msg = "Decompressed " & totalCount & " bytes" MsgBox(msg) If Not DeflateTest.CompareData(buffer, buffer.Length, decompressedBuffer, totalCount) Then msg = "Error. The two buffers did not compare." MsgBox(msg) End If zipStream.Close() Catch e As Exception msg = "Error: The file being read contains invalid data." MsgBox(msg) End Try End Sub 'DeflateCompressDecompress Public Shared Sub Main(ByVal args() As String) Dim usageText As String = "Usage: DeflateTest <inputfilename>" 'If no file name is specified, write usage text. If args.Length = 0 Then Console.WriteLine(usageText) Else If File.Exists(args(0)) Then DeflateCompressDecompress(args(0)) End If End If End Sub 'Main End Class 'DeflateTest
using System; using System.IO; using System.IO.Compression; public class DeflateTest { public static int ReadAllBytesFromStream(Stream stream, byte[] buffer) { // Use this method is used to read all bytes from a stream. int offset = 0; int totalCount = 0; while (true) { int bytesRead = stream.Read(buffer, offset, 100); if ( bytesRead == 0) { break; } offset += bytesRead; totalCount += bytesRead; } return totalCount; } public static bool CompareData(byte[] buf1, int len1, byte[] buf2, int len2) { // Use this method to compare data from two different buffers. if (len1 != len2) { Console.WriteLine("Number of bytes in two buffer are different {0}:{1}", len1, len2); return false; } for ( int i= 0; i< len1; i++) { if ( buf1[i] != buf2[i]) { Console.WriteLine("byte {0} is different {1}|{2}", i, buf1[i], buf2[i]); return false; } } Console.WriteLine("All bytes compare."); return true; } public static void DeflateCompressDecompress(string filename) { Console.WriteLine("Test compression and decompression on file {0}", filename); FileStream infile; try { // Open the file as a FileStream object. infile = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read); byte[] buffer = new byte[infile.Length]; // Read the file to ensure it is readable. int count = infile.Read(buffer, 0, buffer.Length); if ( count != buffer.Length) { infile.Close(); Console.WriteLine("Test Failed: Unable to read data from file"); return; } infile.Close(); MemoryStream ms = new MemoryStream(); // Use the newly created memory stream for the compressed data. DeflateStream compressedzipStream = new DeflateStream(ms , CompressionMode.Compress, true); Console.WriteLine("Compression"); compressedzipStream.Write(buffer, 0, buffer.Length); // Close the stream. compressedzipStream.Close(); Console.WriteLine("Original size: {0}, Compressed size: {1}", buffer.Length, ms.Length); // Reset the memory stream position to begin decompression. ms.Position = 0; DeflateStream zipStream = new DeflateStream(ms, CompressionMode.Decompress); Console.WriteLine("Decompression"); byte[] decompressedBuffer = new byte[buffer.Length + 100]; // Use the ReadAllBytesFromStream to read the stream. int totalCount = DeflateTest.ReadAllBytesFromStream(zipStream, decompressedBuffer); Console.WriteLine("Decompressed {0} bytes", totalCount); if( !DeflateTest.CompareData(buffer, buffer.Length, decompressedBuffer, totalCount) ) { Console.WriteLine("Error. The two buffers did not compare."); } zipStream.Close(); } // end try catch (InvalidDataException) { Console.WriteLine("Error: The file being read contains invalid data."); } catch (FileNotFoundException) { Console.WriteLine("Error:The file specified was not found."); } catch (ArgumentException) { Console.WriteLine("Error: path is a zero-length string, contains only white space, or contains one or more invalid characters"); } catch (PathTooLongException) { Console.WriteLine("Error: The specified path, file name, or both exceed the system-defined maximum length. For example, on Windows-based platforms, paths must be less than 248 characters, and file names must be less than 260 characters."); } catch (DirectoryNotFoundException) { Console.WriteLine("Error: The specified path is invalid, such as being on an unmapped drive."); } catch (IOException) { Console.WriteLine("Error: An I/O error occurred while opening the file."); } catch (UnauthorizedAccessException) { Console.WriteLine("Error: path specified a file that is read-only, the path is a directory, or caller does not have the required permissions."); } catch (IndexOutOfRangeException) { Console.WriteLine("Error: You must provide parameters for MyGZIP."); } } public static void Main(string[] args) { string usageText = "Usage: DeflateTest <inputfilename>"; //If no file name is specified, write usage text. if (args.Length == 0) { Console.WriteLine(usageText); } else { if (File.Exists(args[0])) DeflateCompressDecompress(args[0]); } } }
#using <System.dll> using namespace System; using namespace System::IO; using namespace System::IO::Compression; int ReadAllBytesFromStream( Stream^ stream, array<Byte>^buffer ) { // Use this method is used to read all bytes from a stream. int offset = 0; int totalCount = 0; for ( ; ; ) { int bytesRead = stream->Read( buffer, offset, 100 ); if ( bytesRead == 0 ) { break; } offset += bytesRead; totalCount += bytesRead; } return totalCount; } bool CompareData( array<Byte>^buf1, int len1, array<Byte>^buf2, int len2 ) { // Use this method to compare data from two different buffers. if ( len1 != len2 ) { Console::WriteLine( "Number of bytes in two buffer are different {0}:{1}", len1, len2 ); return false; } for ( int i = 0; i < len1; i++ ) { if ( buf1[ i ] != buf2[ i ] ) { Console::WriteLine( "byte {0} is different {1}|{2}", i, buf1[ i ], buf2[ i ] ); return false; } } Console::WriteLine( "All bytes compare." ); return true; } void DeflateCompressDecompress( String^ filename ) { Console::WriteLine( "Test compression and decompression on file {0}", filename ); FileStream^ infile; try { // Open the file as a FileStream object. infile = gcnew FileStream( filename,FileMode::Open,FileAccess::Read,FileShare::Read ); array<Byte>^buffer = gcnew array<Byte>((int)infile->Length); // Read the file to ensure it is readable. int count = infile->Read( buffer, 0, buffer->Length ); if ( count != buffer->Length ) { infile->Close(); Console::WriteLine( "Test Failed: Unable to read data from file" ); return; } infile->Close(); MemoryStream^ ms = gcnew MemoryStream; // Use the newly created memory stream for the compressed data. DeflateStream ^ compressedzipStream = gcnew DeflateStream( ms,CompressionMode::Compress,true ); Console::WriteLine( "Compression" ); compressedzipStream->Write( buffer, 0, buffer->Length ); // Close the stream. compressedzipStream->Close(); Console::WriteLine( "Original size: {0}, Compressed size: {1}", buffer->Length, ms->Length ); // Reset the memory stream position to begin decompression. ms->Position = 0; DeflateStream ^ zipStream = gcnew DeflateStream( ms,CompressionMode::Decompress ); Console::WriteLine( "Decompression" ); array<Byte>^decompressedBuffer = gcnew array<Byte>(buffer->Length + 100); // Use the ReadAllBytesFromStream to read the stream. int totalCount = ReadAllBytesFromStream( zipStream, decompressedBuffer ); Console::WriteLine( "Decompressed {0} bytes", totalCount ); if ( !CompareData( buffer, buffer->Length, decompressedBuffer, totalCount ) ) { Console::WriteLine( "Error. The two buffers did not compare." ); } zipStream->Close(); } catch ( InvalidDataException ^ ) { Console::WriteLine( "Error: The file being read contains invalid data." ); } catch ( FileNotFoundException^ ) { Console::WriteLine( "Error:The file specified was not found." ); } catch ( ArgumentException^ ) { Console::WriteLine( "Error: path is a zero-length string, contains only white space, or contains one or more invalid characters" ); } catch ( PathTooLongException^ ) { Console::WriteLine( "Error: The specified path, file name, or both exceed the system-defined maximum length." " For example, on Windows-based platforms, paths must be less than 248 characters, and file names must be less than 260 characters." ); } catch ( DirectoryNotFoundException^ ) { Console::WriteLine( "Error: The specified path is invalid, such as being on an unmapped drive." ); } catch ( IOException^ ) { Console::WriteLine( "Error: An I/O error occurred while opening the file." ); } catch ( UnauthorizedAccessException^ ) { Console::WriteLine( "Error: path specified a file that is read-only, the path is a directory, or caller does not have the required permissions." ); } catch ( IndexOutOfRangeException^ ) { Console::WriteLine( "Error: You must provide parameters for MyGZIP." ); } } int main() { array<String^>^args = Environment::GetCommandLineArgs(); String^ usageText = "Usage: DeflateTest <inputfilename>"; //If no file name is specified, write usage text. if ( args->Length == 1 ) { Console::WriteLine( usageText ); } else { if ( File::Exists( args[ 1 ] ) ) DeflateCompressDecompress( args[ 1 ] ); } }
import System.*; import System.IO.*; import System.IO.Compression.*; public class DeflateTest { public static int ReadAllBytesFromStream(Stream stream, ubyte buffer[]) { // Use this method is used to read all bytes from a stream. int offSet = 0; int totalCount = 0; while (true) { int bytesRead = stream.Read(buffer, offSet, 100); if (bytesRead == 0) { break; } offSet += bytesRead; totalCount += bytesRead; } return totalCount; } //ReadAllBytesFromStream public static boolean CompareData(ubyte buf1[], int len1, ubyte buf2[], int len2) { // Use this method to compare data from two different buffers. if (len1 != len2) { Console.WriteLine("Number of bytes in two buffer are " + "different {0}:{1}", System.Convert.ToString(len1), System.Convert.ToString(len2)); return false; } for (int i = 0; i < len1; i++) { if (!(buf1.get_Item(i).Equals(buf2.get_Item(i)))) { Console.WriteLine("byte {0} is different {1}|{2}", System.Convert.ToString(i), System.Convert.ToString(buf1.get_Item(i)), System.Convert.ToString(buf2.get_Item(i))); return false; } } Console.WriteLine("All bytes compare."); return true; } //CompareData public static void DeflateCompressDecompress(String fileName) { Console.WriteLine("Test compression and decompression on file {0}" , fileName); FileStream inFile; try { // Open the file as a FileStream object. inFile = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read); ubyte buffer[] = new ubyte[(ubyte)inFile.get_Length()]; // Read the file to ensure it is readable. int count = inFile.Read(buffer, 0, buffer.length); if (count != buffer.length) { inFile.Close(); Console.WriteLine("Test Failed: Unable to read data from file"); return; } inFile.Close(); MemoryStream ms = new MemoryStream(); // Use the newly created memory stream for the compressed data. DeflateStream compressedZipStream = new DeflateStream(ms, CompressionMode.Compress, true); Console.WriteLine("Compression"); compressedZipStream.Write(buffer, 0, buffer.length); // Close the stream. compressedZipStream.Close(); Console.WriteLine("Original size: {0}, Compressed size: {1}", System.Convert.ToString(buffer.length), System.Convert.ToString(ms.get_Length())); // Reset the memory stream position to begin decompression. ms.set_Position(0); DeflateStream zipStream = new DeflateStream(ms, CompressionMode.Decompress); Console.WriteLine("Decompression"); ubyte decompressedBuffer[] = new ubyte[buffer.length + 100]; // Use the ReadAllBytesFromStream to read the stream. int totalCount = DeflateTest.ReadAllBytesFromStream(zipStream, decompressedBuffer); Console.WriteLine("Decompressed {0} bytes", System.Convert.ToString(totalCount)); if (!(DeflateTest.CompareData(buffer, buffer.length, decompressedBuffer, totalCount))) { Console.WriteLine("Error. The two buffers did not compare."); } zipStream.Close(); } catch (InvalidDataException exp) { Console.WriteLine("Error: The file being read contains" + " invalid data."); } catch (FileNotFoundException exp) { Console.WriteLine("Error:The file specified was not found."); } catch (ArgumentException exp) { Console.WriteLine("Error: path is a zero-length string, contains" + " only white space, or contains one or more " + "invalid characters"); } catch (PathTooLongException exp) { Console.WriteLine("Error: The specified path, file name, or both" + " exceed the system-defined maximum length. For example, " + "on Windows-based platforms, paths must be less than 248 " + "characters, and file names must be less than 260 " + "characters."); } catch (DirectoryNotFoundException exp) { Console.WriteLine("Error: The specified path is invalid, such" + " as being on an unmapped drive."); } catch (IOException exp) { Console.WriteLine("Error: An I/O error occurred while " + "opening the file."); } catch (UnauthorizedAccessException exp) { Console.WriteLine("Error: path specified a file that is read-only ," + " the path is a directory, or caller does not have the" + " required permissions."); } catch (IndexOutOfRangeException exp) { Console.WriteLine("Error: You must provide parameters for MyGZIP."); } } //DeflateCompressDecompress public static void main(String[] args) { String usageText = "Usage: DeflateTest <inputfilename>"; //If no file name is specified, write usage text. if (args.length == 0) { Console.WriteLine(usageText); } else { if (File.Exists(args[0])) { DeflateCompressDecompress(args[0]); } } } //main } //DeflateTest

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


DeflateStream コンストラクタ (Stream, CompressionMode, Boolean)
アセンブリ: System (system.dll 内)

Dim stream As Stream Dim mode As CompressionMode Dim leaveOpen As Boolean Dim instance As New DeflateStream(stream, mode, leaveOpen)


既定では、DeflateStream が基になるストリームを所有しているため、ストリームを閉じると基になるストリームも閉じられます。基になるストリームの状態によっては、ストリームを使用できなくなることがあります。また、明示的なチェックは実行されないため、新しいインスタンスの作成時に追加の例外はスローされません。
Compress と等しい mode パラメータを使用して DeflateStream クラスのインスタンスが作成されると、ヘッダー情報が即座に挿入されます。それ以上のアクションが実行されないと、ストリームは有効な空の圧縮ファイルとして表示されます。

DeflateStream クラスを使用して、ファイルの圧縮および圧縮解除を実行するコード例を次に示します。
Imports System Imports System.IO Imports System.IO.Compression Public Class DeflateTest Shared msg As String Public Shared Function ReadAllBytesFromStream(stream As Stream, buffer() As Byte) As Integer ' Use this method is used to read all bytes from a stream. Dim offset As Integer = 0 Dim totalCount As Integer = 0 While True Dim bytesRead As Integer = stream.Read(buffer, offset, 100) If bytesRead = 0 Then Exit While End If offset += bytesRead totalCount += bytesRead End While Return totalCount End Function 'ReadAllBytesFromStream Public Shared Function CompareData(buf1() As Byte, len1 As Integer, buf2() As Byte, len2 As Integer) As Boolean ' Use this method to compare data from two different buffers. If len1 <> len2 Then msg = "Number of bytes in two buffer are different" & len1 & ":" & len2 MsgBox(msg) Return False End If Dim i As Integer For i = 0 To len1 - 1 If buf1(i) <> buf2(i) Then msg = "byte " & i & " is different " & buf1(i) & "|" & buf2(i) MsgBox(msg) Return False End If Next i msg = "All bytes compare." MsgBox(msg) Return True End Function 'CompareData Public Shared Sub DeflateCompressDecompress(filename As String) msg = "Test compression and decompression on file " & filename MsgBox(msg) Dim infile As FileStream Try ' Open the file as a FileStream object. infile = New FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read) Dim buffer(infile.Length - 1) As Byte ' Read the file to ensure it is readable. Dim count As Integer = infile.Read(buffer, 0, buffer.Length) If count <> buffer.Length Then infile.Close() msg = "Test Failed: Unable to read data from file" MsgBox(msg) Return End If infile.Close() Dim ms As New MemoryStream() ' Use the newly created memory stream for the compressed data. Dim compressedzipStream As New DeflateStream(ms, CompressionMode.Compress, True) compressedzipStream.Write(buffer, 0, buffer.Length) ' Close the stream. compressedzipStream.Close() msg = "Original size: " & buffer.Length & ", Compressed size: " & ms.Length MsgBox(msg) ' Reset the memory stream position to begin decompression. ms.Position = 0 Dim zipStream As New DeflateStream(ms, CompressionMode.Decompress) Dim decompressedBuffer(buffer.Length + 100) As Byte ' Use the ReadAllBytesFromStream to read the stream. Dim totalCount As Integer = DeflateTest.ReadAllBytesFromStream(zipStream, decompressedBuffer) msg = "Decompressed " & totalCount & " bytes" MsgBox(msg) If Not DeflateTest.CompareData(buffer, buffer.Length, decompressedBuffer, totalCount) Then msg = "Error. The two buffers did not compare." MsgBox(msg) End If zipStream.Close() Catch e As Exception msg = "Error: The file being read contains invalid data." MsgBox(msg) End Try End Sub 'DeflateCompressDecompress Public Shared Sub Main(ByVal args() As String) Dim usageText As String = "Usage: DeflateTest <inputfilename>" 'If no file name is specified, write usage text. If args.Length = 0 Then Console.WriteLine(usageText) Else If File.Exists(args(0)) Then DeflateCompressDecompress(args(0)) End If End If End Sub 'Main End Class 'DeflateTest
using System; using System.IO; using System.IO.Compression; public class DeflateTest { public static int ReadAllBytesFromStream(Stream stream, byte[] buffer) { // Use this method is used to read all bytes from a stream. int offset = 0; int totalCount = 0; while (true) { int bytesRead = stream.Read(buffer, offset, 100); if ( bytesRead == 0) { break; } offset += bytesRead; totalCount += bytesRead; } return totalCount; } public static bool CompareData(byte[] buf1, int len1, byte[] buf2, int len2) { // Use this method to compare data from two different buffers. if (len1 != len2) { Console.WriteLine("Number of bytes in two buffer are different {0}:{1}", len1, len2); return false; } for ( int i= 0; i< len1; i++) { if ( buf1[i] != buf2[i]) { Console.WriteLine("byte {0} is different {1}|{2}", i, buf1[i], buf2[i]); return false; } } Console.WriteLine("All bytes compare."); return true; } public static void DeflateCompressDecompress(string filename) { Console.WriteLine("Test compression and decompression on file {0}", filename); FileStream infile; try { // Open the file as a FileStream object. infile = new FileStream(filename, FileMode.Open, FileAccess.Read, FileShare.Read); byte[] buffer = new byte[infile.Length]; // Read the file to ensure it is readable. int count = infile.Read(buffer, 0, buffer.Length); if ( count != buffer.Length) { infile.Close(); Console.WriteLine("Test Failed: Unable to read data from file"); return; } infile.Close(); MemoryStream ms = new MemoryStream(); // Use the newly created memory stream for the compressed data. DeflateStream compressedzipStream = new DeflateStream(ms , CompressionMode.Compress, true); Console.WriteLine("Compression"); compressedzipStream.Write(buffer, 0, buffer.Length); // Close the stream. compressedzipStream.Close(); Console.WriteLine("Original size: {0}, Compressed size: {1}", buffer.Length, ms.Length); // Reset the memory stream position to begin decompression. ms.Position = 0; DeflateStream zipStream = new DeflateStream(ms, CompressionMode.Decompress); Console.WriteLine("Decompression"); byte[] decompressedBuffer = new byte[buffer.Length + 100]; // Use the ReadAllBytesFromStream to read the stream. int totalCount = DeflateTest.ReadAllBytesFromStream(zipStream, decompressedBuffer); Console.WriteLine("Decompressed {0} bytes", totalCount); if( !DeflateTest.CompareData(buffer, buffer.Length, decompressedBuffer, totalCount) ) { Console.WriteLine("Error. The two buffers did not compare."); } zipStream.Close(); } // end try catch (InvalidDataException) { Console.WriteLine("Error: The file being read contains invalid data."); } catch (FileNotFoundException) { Console.WriteLine("Error:The file specified was not found."); } catch (ArgumentException) { Console.WriteLine("Error: path is a zero-length string, contains only white space, or contains one or more invalid characters"); } catch (PathTooLongException) { Console.WriteLine("Error: The specified path, file name, or both exceed the system-defined maximum length. For example, on Windows-based platforms, paths must be less than 248 characters, and file names must be less than 260 characters."); } catch (DirectoryNotFoundException) { Console.WriteLine("Error: The specified path is invalid, such as being on an unmapped drive."); } catch (IOException) { Console.WriteLine("Error: An I/O error occurred while opening the file."); } catch (UnauthorizedAccessException) { Console.WriteLine("Error: path specified a file that is read-only, the path is a directory, or caller does not have the required permissions."); } catch (IndexOutOfRangeException) { Console.WriteLine("Error: You must provide parameters for MyGZIP."); } } public static void Main(string[] args) { string usageText = "Usage: DeflateTest <inputfilename>"; //If no file name is specified, write usage text. if (args.Length == 0) { Console.WriteLine(usageText); } else { if (File.Exists(args[0])) DeflateCompressDecompress(args[0]); } } }
#using <System.dll> using namespace System; using namespace System::IO; using namespace System::IO::Compression; int ReadAllBytesFromStream( Stream^ stream, array<Byte>^buffer ) { // Use this method is used to read all bytes from a stream. int offset = 0; int totalCount = 0; for ( ; ; ) { int bytesRead = stream->Read( buffer, offset, 100 ); if ( bytesRead == 0 ) { break; } offset += bytesRead; totalCount += bytesRead; } return totalCount; } bool CompareData( array<Byte>^buf1, int len1, array<Byte>^buf2, int len2 ) { // Use this method to compare data from two different buffers. if ( len1 != len2 ) { Console::WriteLine( "Number of bytes in two buffer are different {0}:{1}", len1, len2 ); return false; } for ( int i = 0; i < len1; i++ ) { if ( buf1[ i ] != buf2[ i ] ) { Console::WriteLine( "byte {0} is different {1}|{2}", i, buf1[ i ], buf2[ i ] ); return false; } } Console::WriteLine( "All bytes compare." ); return true; } void DeflateCompressDecompress( String^ filename ) { Console::WriteLine( "Test compression and decompression on file {0}", filename ); FileStream^ infile; try { // Open the file as a FileStream object. infile = gcnew FileStream( filename,FileMode::Open,FileAccess::Read,FileShare::Read ); array<Byte>^buffer = gcnew array<Byte>((int)infile->Length); // Read the file to ensure it is readable. int count = infile->Read( buffer, 0, buffer->Length ); if ( count != buffer->Length ) { infile->Close(); Console::WriteLine( "Test Failed: Unable to read data from file" ); return; } infile->Close(); MemoryStream^ ms = gcnew MemoryStream; // Use the newly created memory stream for the compressed data. DeflateStream ^ compressedzipStream = gcnew DeflateStream( ms,CompressionMode::Compress,true ); Console::WriteLine( "Compression" ); compressedzipStream->Write( buffer, 0, buffer->Length ); // Close the stream. compressedzipStream->Close(); Console::WriteLine( "Original size: {0}, Compressed size: {1}", buffer->Length, ms->Length ); // Reset the memory stream position to begin decompression. ms->Position = 0; DeflateStream ^ zipStream = gcnew DeflateStream( ms,CompressionMode::Decompress ); Console::WriteLine( "Decompression" ); array<Byte>^decompressedBuffer = gcnew array<Byte>(buffer->Length + 100); // Use the ReadAllBytesFromStream to read the stream. int totalCount = ReadAllBytesFromStream( zipStream, decompressedBuffer ); Console::WriteLine( "Decompressed {0} bytes", totalCount ); if ( !CompareData( buffer, buffer->Length, decompressedBuffer, totalCount ) ) { Console::WriteLine( "Error. The two buffers did not compare." ); } zipStream->Close(); } catch ( InvalidDataException ^ ) { Console::WriteLine( "Error: The file being read contains invalid data." ); } catch ( FileNotFoundException^ ) { Console::WriteLine( "Error:The file specified was not found." ); } catch ( ArgumentException^ ) { Console::WriteLine( "Error: path is a zero-length string, contains only white space, or contains one or more invalid characters" ); } catch ( PathTooLongException^ ) { Console::WriteLine( "Error: The specified path, file name, or both exceed the system-defined maximum length." " For example, on Windows-based platforms, paths must be less than 248 characters, and file names must be less than 260 characters." ); } catch ( DirectoryNotFoundException^ ) { Console::WriteLine( "Error: The specified path is invalid, such as being on an unmapped drive." ); } catch ( IOException^ ) { Console::WriteLine( "Error: An I/O error occurred while opening the file." ); } catch ( UnauthorizedAccessException^ ) { Console::WriteLine( "Error: path specified a file that is read-only, the path is a directory, or caller does not have the required permissions." ); } catch ( IndexOutOfRangeException^ ) { Console::WriteLine( "Error: You must provide parameters for MyGZIP." ); } } int main() { array<String^>^args = Environment::GetCommandLineArgs(); String^ usageText = "Usage: DeflateTest <inputfilename>"; //If no file name is specified, write usage text. if ( args->Length == 1 ) { Console::WriteLine( usageText ); } else { if ( File::Exists( args[ 1 ] ) ) DeflateCompressDecompress( args[ 1 ] ); } }
import System.*; import System.IO.*; import System.IO.Compression.*; public class DeflateTest { public static int ReadAllBytesFromStream(Stream stream, ubyte buffer[]) { // Use this method is used to read all bytes from a stream. int offSet = 0; int totalCount = 0; while (true) { int bytesRead = stream.Read(buffer, offSet, 100); if (bytesRead == 0) { break; } offSet += bytesRead; totalCount += bytesRead; } return totalCount; } //ReadAllBytesFromStream public static boolean CompareData(ubyte buf1[], int len1, ubyte buf2[], int len2) { // Use this method to compare data from two different buffers. if (len1 != len2) { Console.WriteLine("Number of bytes in two buffer are " + "different {0}:{1}", System.Convert.ToString(len1), System.Convert.ToString(len2)); return false; } for (int i = 0; i < len1; i++) { if (!(buf1.get_Item(i).Equals(buf2.get_Item(i)))) { Console.WriteLine("byte {0} is different {1}|{2}", System.Convert.ToString(i), System.Convert.ToString(buf1.get_Item(i)), System.Convert.ToString(buf2.get_Item(i))); return false; } } Console.WriteLine("All bytes compare."); return true; } //CompareData public static void DeflateCompressDecompress(String fileName) { Console.WriteLine("Test compression and decompression on file {0}" , fileName); FileStream inFile; try { // Open the file as a FileStream object. inFile = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.Read); ubyte buffer[] = new ubyte[(ubyte)inFile.get_Length()]; // Read the file to ensure it is readable. int count = inFile.Read(buffer, 0, buffer.length); if (count != buffer.length) { inFile.Close(); Console.WriteLine("Test Failed: Unable to read data from file"); return; } inFile.Close(); MemoryStream ms = new MemoryStream(); // Use the newly created memory stream for the compressed data. DeflateStream compressedZipStream = new DeflateStream(ms, CompressionMode.Compress, true); Console.WriteLine("Compression"); compressedZipStream.Write(buffer, 0, buffer.length); // Close the stream. compressedZipStream.Close(); Console.WriteLine("Original size: {0}, Compressed size: {1}", System.Convert.ToString(buffer.length), System.Convert.ToString(ms.get_Length())); // Reset the memory stream position to begin decompression. ms.set_Position(0); DeflateStream zipStream = new DeflateStream(ms, CompressionMode.Decompress); Console.WriteLine("Decompression"); ubyte decompressedBuffer[] = new ubyte[buffer.length + 100]; // Use the ReadAllBytesFromStream to read the stream. int totalCount = DeflateTest.ReadAllBytesFromStream(zipStream, decompressedBuffer); Console.WriteLine("Decompressed {0} bytes", System.Convert.ToString(totalCount)); if (!(DeflateTest.CompareData(buffer, buffer.length, decompressedBuffer, totalCount))) { Console.WriteLine("Error. The two buffers did not compare."); } zipStream.Close(); } catch (InvalidDataException exp) { Console.WriteLine("Error: The file being read contains" + " invalid data."); } catch (FileNotFoundException exp) { Console.WriteLine("Error:The file specified was not found."); } catch (ArgumentException exp) { Console.WriteLine("Error: path is a zero-length string, contains" + " only white space, or contains one or more " + "invalid characters"); } catch (PathTooLongException exp) { Console.WriteLine("Error: The specified path, file name, or both" + " exceed the system-defined maximum length. For example, " + "on Windows-based platforms, paths must be less than 248 " + "characters, and file names must be less than 260 " + "characters."); } catch (DirectoryNotFoundException exp) { Console.WriteLine("Error: The specified path is invalid, such" + " as being on an unmapped drive."); } catch (IOException exp) { Console.WriteLine("Error: An I/O error occurred while " + "opening the file."); } catch (UnauthorizedAccessException exp) { Console.WriteLine("Error: path specified a file that is read-only ," + " the path is a directory, or caller does not have the" + " required permissions."); } catch (IndexOutOfRangeException exp) { Console.WriteLine("Error: You must provide parameters for MyGZIP."); } } //DeflateCompressDecompress public static void main(String[] args) { String usageText = "Usage: DeflateTest <inputfilename>"; //If no file name is specified, write usage text. if (args.length == 0) { Console.WriteLine(usageText); } else { if (File.Exists(args[0])) { DeflateCompressDecompress(args[0]); } } } //main } //DeflateTest

Windows 98, Windows 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition
開発プラットフォームの中には、.NET Framework によってサポートされていないバージョンがあります。サポートされているバージョンについては、「システム要件」を参照してください。


DeflateStream コンストラクタ
DeflateStream クラスを使用してサイズが 4 GB を超えるファイルを圧縮すると、例外が発生します。

名前 | 説明 |
---|---|
DeflateStream (Stream, CompressionMode) | 指定したストリームと CompressionMode 値を使用して、DeflateStream クラスの新しいインスタンスを初期化します。 |
DeflateStream (Stream, CompressionMode, Boolean) | 指定したストリームと CompressionMode 値、およびストリームを開いたままにしておくかどうかを指定する値を使用して、DeflateStream クラスの新しいインスタンスを初期化します。 |

DeflateStream プロパティ

名前 | 説明 | |
---|---|---|
![]() | BaseStream | 基になるストリームへの参照を取得します。 |
![]() | CanRead | オーバーライドされます。 ファイルの圧縮解除中にストリームが読み取りをサポートするかどうかを示す値を取得します。 |
![]() | CanSeek | オーバーライドされます。 ストリームがシークをサポートしているかどうかを示す値を取得します。 |
![]() | CanTimeout | 現在のストリームがタイムアウトできるかどうかを決定する値を取得します。 ( Stream から継承されます。) |
![]() | CanWrite | オーバーライドされます。 ストリームが書き込みをサポートしているかどうかを示す値を取得します。 |
![]() | Length | オーバーライドされます。 このプロパティはサポートされていないため、常に NotSupportedException をスローします。 |
![]() | Position | オーバーライドされます。 このプロパティはサポートされていないため、常に NotSupportedException をスローします。 |
![]() | ReadTimeout | ストリームがタイムアウト前に読み取りを試行する期間を決定する値を取得または設定します。 ( Stream から継承されます。) |
![]() | WriteTimeout | ストリームがタイムアウト前に書き込みを試行する期間を決定する値を取得または設定します。 ( Stream から継承されます。) |

DeflateStream メソッド


名前 | 説明 | |
---|---|---|
![]() | CreateWaitHandle | WaitHandle オブジェクトを割り当てます。 ( Stream から継承されます。) |
![]() | Dispose | オーバーロードされます。 オーバーライドされます。 |
![]() | Finalize | Object がガベージ コレクションにより収集される前に、その Object がリソースを解放し、その他のクリーンアップ操作を実行できるようにします。 ( Object から継承されます。) |
![]() | MemberwiseClone | オーバーロードされます。 ( MarshalByRefObject から継承されます。) |

DeflateStream メンバ
デフレート アルゴリズムを使用して、ストリームの圧縮および圧縮解除を実行するためのメソッドとプロパティを提供します。
DeflateStream データ型で公開されるメンバを以下の表に示します。


名前 | 説明 | |
---|---|---|
![]() | BaseStream | 基になるストリームへの参照を取得します。 |
![]() | CanRead | オーバーライドされます。 ファイルの圧縮解除中にストリームが読み取りをサポートするかどうかを示す値を取得します。 |
![]() | CanSeek | オーバーライドされます。 ストリームがシークをサポートしているかどうかを示す値を取得します。 |
![]() | CanTimeout | 現在のストリームがタイムアウトできるかどうかを決定する値を取得します。(Stream から継承されます。) |
![]() | CanWrite | オーバーライドされます。 ストリームが書き込みをサポートしているかどうかを示す値を取得します。 |
![]() | Length | オーバーライドされます。 このプロパティはサポートされていないため、常に NotSupportedException をスローします。 |
![]() | Position | オーバーライドされます。 このプロパティはサポートされていないため、常に NotSupportedException をスローします。 |
![]() | ReadTimeout | ストリームがタイムアウト前に読み取りを試行する期間を決定する値を取得または設定します。 (Stream から継承されます。) |
![]() | WriteTimeout | ストリームがタイムアウト前に書き込みを試行する期間を決定する値を取得または設定します。 (Stream から継承されます。) |


名前 | 説明 | |
---|---|---|
![]() | CreateWaitHandle | WaitHandle オブジェクトを割り当てます。 (Stream から継承されます。) |
![]() | Dispose | オーバーロードされます。 オーバーライドされます。 |
![]() | Finalize | Object がガベージ コレクションにより収集される前に、その Object がリソースを解放し、その他のクリーンアップ操作を実行できるようにします。 (Object から継承されます。) |
![]() | MemberwiseClone | オーバーロードされます。 ( MarshalByRefObject から継承されます。) |

- DeflateStreamのページへのリンク