[英]Using SevenZipSharp to compress in multi volumes?
我想使用SevenZipsharp壓縮卷中的文件,例如將100 mb的文件壓縮為10個10 mb的文件。 我們可以使用7zip.exe -volume參數來做同樣的事情......
例如,當我使用7Zip壓縮多卷時,我得到這些文件結構:
File.7z.001
File.7z.002
File.7z.003
etc...
文件不是獨立的,不是一個大小相同的7zip文件,是一個不同卷的壓縮文件,我的意思是提取我們需要的第一個文件“File.7z.001”的整個內容
我想使用SevenZipSharp做同樣的事情(如果可能的話)。
我在vb.net中創建了這個片段(但不管答案是否在C#代碼中),我需要實現多卷選項,我需要幫助:
Imports SevenZip
Dim dll As String = "7z.dll"
Private Function SevenZipSharp_Compress(ByVal Input_DirOrFile As String, _
Optional ByVal OutputFileName As String = Nothing, _
Optional ByVal Format As OutArchiveFormat = OutArchiveFormat.SevenZip, _
Optional ByVal CompressionMode As CompressionMode = CompressionMode.Create, _
Optional ByVal CompressionMethod As CompressionMethod = CompressionMethod.Lzma, _
Optional ByVal CompressionLevel As CompressionLevel = CompressionLevel.Normal, _
Optional ByVal Password As String = Nothing) As Boolean
Try
' Set library path
SevenZipExtractor.SetLibraryPath(dll)
' Create compressor and specify the file or folder to compress
Dim Compressor As SevenZipCompressor = New SevenZipCompressor()
' Set compression parameters
Compressor.CompressionLevel = CompressionLevel ' Archiving compression level.
Compressor.CompressionMethod = CompressionMethod ' Append files to compressed file or overwrite the compressed file.
Compressor.ArchiveFormat = Format ' Compression file format
Compressor.CompressionMode = CompressionMode ' Compression mode
Compressor.DirectoryStructure = True ' Preserve the directory structure.
Compressor.IncludeEmptyDirectories = True ' Include empty directories to archives.
Compressor.ScanOnlyWritable = False ' Compress files only open for writing.
Compressor.EncryptHeaders = False ' Encrypt 7-Zip archive headers
Compressor.TempFolderPath = System.IO.Path.GetTempPath() ' Temporary folder path
Compressor.FastCompression = False ' Compress as fast as possible, without calling events.
Compressor.PreserveDirectoryRoot = True ' Preserve the directory root for CompressDirectory.
Compressor.ZipEncryptionMethod = ZipEncryptionMethod.ZipCrypto ' Encryption method for zip archives.
Compressor.DefaultItemName = "File.7z" ' Item name used when an item to be compressed has no name, for example, when you compress a MemoryStream instance
' Get File extension
Dim CompressedFileExtension As String = Nothing
Select Case Compressor.ArchiveFormat
Case OutArchiveFormat.SevenZip : CompressedFileExtension = ".7z"
Case OutArchiveFormat.BZip2 : CompressedFileExtension = ".bz"
Case OutArchiveFormat.GZip : CompressedFileExtension = ".gzip"
Case OutArchiveFormat.Tar : CompressedFileExtension = ".tar"
Case OutArchiveFormat.XZ : CompressedFileExtension = ".xz"
Case OutArchiveFormat.Zip : CompressedFileExtension = ".zip"
End Select
' Add Progress Handler
'AddHandler Compressor.Compressing, AddressOf SevenZipSharp_Compress_Progress
' Removes the end slash ("\") if given for a directory
If Input_DirOrFile.EndsWith("\") Then Input_DirOrFile = Input_DirOrFile.Substring(0, Input_DirOrFile.Length - 1)
' Generate the OutputFileName if any is given.
If OutputFileName Is Nothing Then _
OutputFileName = (My.Computer.FileSystem.GetFileInfo(Input_DirOrFile).DirectoryName & "\" & (Input_DirOrFile.Split("\").Last) & CompressedFileExtension).Replace("\\", "\")
' Check if given argument is Dir or File ...then start the compression
If IO.Directory.Exists(Input_DirOrFile) Then ' Is a Dir
If Not Password Is Nothing Then
Compressor.CompressDirectory(Input_DirOrFile, OutputFileName, True, Password)
Else
Compressor.CompressDirectory(Input_DirOrFile, OutputFileName, True)
End If
ElseIf IO.File.Exists(Input_DirOrFile) Then ' Is a File
If Not Password Is Nothing Then
Compressor.CompressFilesEncrypted(OutputFileName, Password, Input_DirOrFile)
Else
Compressor.CompressFiles(OutputFileName, Input_DirOrFile)
End If
End If
Catch ex As Exception
'Return False ' File not compressed
Throw New Exception(ex.Message)
End Try
Return True ' File compressed
End Function
代碼段的用法:
SevenZipSharp_Compress("C:\File or folder", _
"Optional: Output dir", _
OutArchiveFormat.SevenZip, _
CompressionMode.Create, _
CompressionMethod.Lzma, _
CompressionLevel.Ultra, _
"Optional: Password")
在Compressor
對象上,將VolumeSize
設置為所需的輸出文件大小(以字節為單位)。 使用下面的示例代碼,源目錄充滿了大約72MB的mp3文件,壓縮器創建了8個名為zipped.7z.001,zipped.7z.002等的輸出文件。
查看SevenZipExtractor
類的當前源代碼,看起來只有在使用OutArchiveFormat.SevenZip
作為ArchiveFormat
才能使用多卷壓縮。
string dll = @"C:\Users\WarrenG\Desktop\7z.dll";
string source = @"C:\Users\WarrenG\Desktop\source";
string output = @"C:\Users\WarrenG\Desktop\output\zipped.7z";
SevenZipExtractor.SetLibraryPath(dll);
SevenZipCompressor compressor = new SevenZipCompressor();
compressor.ArchiveFormat = OutArchiveFormat.SevenZip;
compressor.CompressionMode = CompressionMode.Create;
compressor.TempFolderPath = System.IO.Path.GetTempPath();
compressor.VolumeSize = 10000000; // output file size in bytes
compressor.CompressDirectory(source, output);
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