/// <summary>
/// Extracts a all files from the zip file
/// </summary>
/// <param name="sourceZip">the zip file</param>
/// <param name="destinationFolder">the folder the files will be extracted to</param>
public static int ExtractAll(string sourceZip, string destination)
{
ZipInputStream zinstream = null; // used to read from the zip file
int numFileUnzipped = 0; // number of files extracted from the zip file
try
{
// create a zip input stream from source zip file
zinstream = new ZipInputStream(IO.File.OpenRead(sourceZip));
// we need to extract to a folder so we must create it if needed
if (!IO.Directory.Exists(destination))
IO.Directory.CreateDirectory(destination);
ZipEntry theEntry; // an entry in the zip file which could be a file or directory
// now, walk through the zip file entries and copy each file/directory
while ((theEntry = zinstream.GetNextEntry()) != null)
{
string dirname = IO.Path.GetDirectoryName(theEntry.Name); // the file Path
string fname = IO.Path.GetFileName(theEntry.Name); // the file name
// if a path name exists we should create the directory in the destination folder
string target = destination + IO.Path.DirectorySeparatorChar + dirname;
if (dirname.Length > 0 && !IO.Directory.Exists(target))
IO.Directory.CreateDirectory(target);
// now we know the proper path exists in the destination so copy the file there
if (fname != String.Empty)
{
DecompressAndWriteFile(destination + IO.Path.DirectorySeparatorChar + theEntry.Name, zinstream);
numFileUnzipped++;
}
}
}
catch (Exception)
{
throw;
}
finally
{
zinstream.Close();
}
return numFileUnzipped;
}
private static void DecompressAndWriteFile(string destination, ZipInputStream source)
{
IO.FileStream wstream = null;
try
{
wstream = IO.File.Create(destination);
const int block = 2048;
byte[] data = new byte[block];
while (true)
{
int size = source.Read(data, 0, data.Length);
if (size > 0)
wstream.Write(data, 0, size);
else
break;
}
}
catch (Exception)
{
throw;
}
finally
{
if (wstream != null)
wstream.Close();
}
}
/// <summary>
/// Extracts a specific file from the zip file
/// </summary>
/// <param name="sourceZip">the zip file</param>
/// <param name="destinationFolder">the folder the file will be extracted to</param>
/// <param name="FileName">the file name</param>
public static void ExtractFile(string sourceZip, string destinationFolder, string FileName)
{
ZipInputStream zinstream = null;
int numFileUnzipped = 0;
try
{
zinstream = new ZipInputStream(IO.File.OpenRead(sourceZip));
if (!IO.Directory.Exists(destinationFolder))
IO.Directory.CreateDirectory(destinationFolder);
ZipEntry theEntry;
while ((theEntry = zinstream.GetNextEntry()) != null)
{
string dirname = IO.Path.GetDirectoryName(theEntry.Name);
string fname = IO.Path.GetFileName(theEntry.Name);
if (FileName != fname) continue;
string target = destinationFolder + IO.Path.DirectorySeparatorChar + dirname;
if (dirname.Length > 0 && !IO.Directory.Exists(target))
IO.Directory.CreateDirectory(target);
if (fname != String.Empty)
{
DecompressAndWriteFile(destinationFolder + IO.Path.DirectorySeparatorChar + theEntry.Name, zinstream);
numFileUnzipped++;
}
}
}
catch (Exception)
{
throw;
}
finally
{
zinstream.Close();
}
}
