When extracting rar file in C# using sharpcompress package, it shows a exceprtion as invalid rar header:16

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String filename = @"" + textBox8.Text;
string ppath = @"" + System.IO.Path.GetDirectoryName(textBox8.Text) + "\\"System.IO.Path.GetFileNameWithoutExtension(textBox8.Text);
System.IO.Directory.CreateDirectory(@"" + ppath);
try
{
var archive = SharpCompress.Archives.Rar.RarArchive.Open(filename);
foreach (var entry in archive.Entries.Where(entry => !entry.IsDirectory))
{
entry.WriteToDirectory(ppath, new ExtractionOptions()
{
});
}
}catch(Exception ex)
{
textBox10.Text = Convert.ToString(ex);
}
}

What I have tried:

I have used a Nunrar,SevenZip Extractor and also many packages,Facing this same error,But that File Extracted in WinRar and 7zip also

Posted 12-Mar-18 23:50pm

Member 13018216

Updated 13-Mar-18 1:30am

v2

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Mehdi Gholam 13-Mar-18 6:10am

Your file may be corrupt.

Member 13018216 13-Mar-18 6:30am

But that is Extracted in WinRar and 7zip properly

1 solution

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Jochen Arndt · Accepted Answer · 2018-03-13T01:31:00

Solution 1

When the archive can be unpacked with some tools (including the official one) but not by others, it might have been created with options that are not supported by all uncompressing libraries or it is in RAR 5.0 format which is not supported by all libraries (especially older ones).

You can check the header of the archive against the documentation:
RAR 5.0 archive format[^]

You might also ask the creator of the archive about the used tool and options.

Posted 13-Mar-18 1:31am

Jochen Arndt

Comments

Member 13018216 13-Mar-18 10:48am

I compressed a format with Rar4 format,It will extract a files only not diectories now

Jochen Arndt 13-Mar-18 11:12am

Might be a similar problem (library does not support directories) but RAR4 should support directories.