SEVENZIP FOLDER COMPRESSION. USING SEVENZIP DLLS

Ervin Slavotic

Hi All,

I need help in this code... for compressing directories in c# using sevensharp dlls. http://sevenzipsharp.codeplex.com/ ...

so far the follwing code will create an empyt archvie... so how to add files to it?...

class SevenSync

{

public void CompressFolder(string FolderToCompress, string destination)

{

List subfiles = new List(Directory.GetFiles(FolderToCompress));

FileInfo fi = new FileInfo(FolderToCompress);

StringBuilder output_7zip_File = new StringBuilder(FolderToCompress + Path.DirectorySeparatorChar + fi.Name + @".7z");

string output_stringBuilder = output_7zip_File.ToString();

Console.WriteLine("Output destination : " + output_stringBuilder);

foreach (string file in subfiles)

{

Console.WriteLine("Files to Compress : " + file);

// compressor.BeginCompressFiles(output_stringBuilder, file);

CompressFileLZMA(file, output_stringBuilder);

AddToArchive(file);

}

//___________________________________________________________

////////////////////////////////////////////////////////////|

// C O M P R E S S F I L E |

//_________using LZMA algo__________________________________|

////////////////////////////////////////////////////////////|

public void CompressFileLZMA(string inFile, string outFile)

{

Int32 dictionary = 1 << 23;

Int32 posStateBits = 2;

Int32 litContextBits = 3; // for normal files

// UInt32 litContextBits = 0; // for 32-bit data

Int32 litPosBits = 0;

// UInt32 litPosBits = 2; // for 32-bit data

Int32 algorithm = 2;

Int32 numFastBytes = 128;

string mf = "bt4";

bool eos = true;

bool stdInMode = false;

CoderPropID[] propIDs = {

CoderPropID.DictionarySize,

CoderPropID.PosStateBits,

CoderPropID.LitContextBits,

CoderPropID.LitPosBits,

CoderPropID.Algorithm,

CoderPropID.NumFastBytes,

CoderPropID.MatchFinder,

CoderPropID.EndMarker

};

object[] properties = {

(Int32)(dictionary),

(Int32)(posStateBits),

(Int32)(litContextBits),

(Int32)(litPosBits),

(Int32)(algorithm),

(Int32)(numFastBytes),

mf,

eos

};

try

{

using (FileStream inStream = new FileStream(inFile, FileMode.Open))

{

using (FileStream outStream = new FileStream(outFile, FileMode.Create))

{

SevenZip.Compression.LZMA.Encoder encoder = new SevenZip.Compression.LZMA.Encoder();

encoder.SetCoderProperties(propIDs, properties);

encoder.WriteCoderProperties(outStream);

Int64 fileSize;

if (eos || stdInMode)

fileSize = -1;

else

fileSize = inStream.Length;

for (int i = 0; i < 8; i++)

{

outStream.WriteByte((Byte)(fileSize >> (8 * i)));

}

encoder.Code(inStream, outStream, -1, -1, null);

}

catch (Exception e)

{

Console.WriteLine("ERROR : " + e.Message);

}

//___________________________________________________________

////////////////////////////////////////////////////////////|

// A D D TO A R C H I V E |

//__________________________________________________________|

////////////////////////////////////////////////////////////|

public void AddToArchive(string archiveFile)

{

}

thanks alot

regards

7 Replies

Know the answer? Post it — somebody with the same question will find it here.

Javeed M Shaikh13y ago
Accepted answer
sorry took a while to figure out a few things, try this:

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using SevenZip;
using SevenZip.Sdk.Compression.Lzma;

namespace myspace
{

class MainClass
{

public static void Main()
{

SevenSync sy = new SevenSync();
sy.CompressFolder(@"C:\Temp", @"C:\");

}
}

class SevenSync
{

public void CompressFolder(string FolderToCompress, string destination)
{
List subfiles = new List(Directory.GetFiles(FolderToCompress));
FileInfo fi = new FileInfo(FolderToCompress);
StringBuilder output_7zip_File = new StringBuilder(destination + Path.DirectorySeparatorChar + fi.Name + @".7z");
string output_stringBuilder = output_7zip_File.ToString();

Console.WriteLine("Output destination : " + output_stringBuilder);
SevenZipCompressor cmp = new SevenZipCompressor();
SevenZipCompressor.SetLibraryPath(@"C:\Program Files\7-Zip\7z.dll");
cmp.CompressionMode = CompressionMode.Append;

foreach (string file in subfiles)
{
Console.WriteLine("Files to Compress : " + file);
// compressor.BeginCompressFiles(output_stringBuilder, file);
cmp.CompressFiles(output_stringBuilder, file);
}

}

}
}
Ervin Slavotic13y ago
GOD BLESS U
Javeed M Shaikh13y ago
I am just setting the path for DLL, you can copy/referece the DLL in you project and that can become a part of your deployment. Please make sure you are using 64/32 version of the DLL before you deploy.
Ervin Slavotic13y ago
I understand where u coming from with this approach this approach... and yea it works!...

However, Its only good if your dealing with data on ur local machine... wheras i was looking for a referenced dll within the solution so the .exe program can be executed from a shatred network.....

any ideas on that?
Ervin Slavotic13y ago
its still shwoing the same thing bro... i mean the archive is created however when i attemt to open the archive it does not open... its hopwing as a corrupted archive.......any other ideas?
Ervin Slavotic13y ago
thanks bro ill check it out now...
Javeed M Shaikh13y ago
I downloaded the DLL and created my own project to test this and looks like your code is ok, I made one change to use the "destination" variable. Please check this:

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using SevenZip;
using SevenZip.Sdk.Compression.Lzma;

namespace myspace
{

class MainClass
{

public static void Main()
{
SevenSync sy = new SevenSync();
sy.CompressFolder(@"C:\Temp",@"C:\");
}
}

class SevenSync
{

public void CompressFolder(string FolderToCompress, string destination)
{
List subfiles = new List(Directory.GetFiles(FolderToCompress));
FileInfo fi = new FileInfo(FolderToCompress);
StringBuilder output_7zip_File = new StringBuilder(destination + Path.DirectorySeparatorChar + fi.Name + @".7z");
string output_stringBuilder = output_7zip_File.ToString();

Console.WriteLine("Output destination : " + output_stringBuilder);

foreach (string file in subfiles)
{
Console.WriteLine("Files to Compress : " + file);
// compressor.BeginCompressFiles(output_stringBuilder, file);
CompressFileLZMA(file, output_stringBuilder);
AddToArchive(file);
}

}

//___________________________________________________________
////////////////////////////////////////////////////////////|
// C O M P R E S S F I L E |
//_________using LZMA algo__________________________________|
////////////////////////////////////////////////////////////|
public void CompressFileLZMA(string inFile, string outFile)
{
Int32 dictionary = 1 << 23;
Int32 posStateBits = 2;
Int32 litContextBits = 3; // for normal files
// UInt32 litContextBits = 0; // for 32-bit data
Int32 litPosBits = 0;
// UInt32 litPosBits = 2; // for 32-bit data
Int32 algorithm = 2;
Int32 numFastBytes = 128;

string mf = "bt4";
bool eos = true;
bool stdInMode = false;

SevenZip.Sdk.CoderPropId[] propIDs = {
SevenZip.Sdk.CoderPropId.DictionarySize,
SevenZip.Sdk.CoderPropId.PosStateBits,
SevenZip.Sdk.CoderPropId.LitContextBits,
SevenZip.Sdk.CoderPropId.LitPosBits,
SevenZip.Sdk.CoderPropId.Algorithm,
SevenZip.Sdk.CoderPropId.NumFastBytes,
SevenZip.Sdk.CoderPropId.MatchFinder,
SevenZip.Sdk.CoderPropId.EndMarker
};

object[] properties = {
(Int32)(dictionary),
(Int32)(posStateBits),
(Int32)(litContextBits),
(Int32)(litPosBits),
(Int32)(algorithm),
(Int32)(numFastBytes),
mf,
eos
};

try
{
using (FileStream inStream = new FileStream(inFile, FileMode.Open))
{
using (FileStream outStream = new FileStream(outFile, FileMode.Create))
{
SevenZip.Sdk.Compression.Lzma.Encoder encoder = new SevenZip.Sdk.Compression.Lzma.Encoder();
encoder.SetCoderProperties(propIDs, properties);
encoder.WriteCoderProperties(outStream);
Int64 fileSize;
if (eos || stdInMode)
fileSize = -1;
else
fileSize = inStream.Length;
for (int i = 0; i < 8; i++)
{
outStream.WriteByte((Byte)(fileSize >> (8 * i)));

}
encoder.Code(inStream, outStream, -1, -1, null);
}
}
}
catch (Exception e)
{
Console.WriteLine("ERROR : " + e.Message);
}

}

//___________________________________________________________
////////////////////////////////////////////////////////////|
// A D D TO A R C H I V E |
//__________________________________________________________|
////////////////////////////////////////////////////////////|

public void AddToArchive(string archiveFile)
{

}
}
}