问题
Okay, so I have searched for dll files that will allow me to unrar files and I was able to find quite a few such as unrar.dll, chilkat, sharpcompress and some more but I wanted to use the one provided by Rar themselves.
So I referenced the DLL file in my project and imported it. I was using unrar.dll.
But I wasn't able to find any up to date code to allow me to test and try things out. All the examples I found were either not up to date or not for Vb.net.
I also tried the official example, which came in the installation but that didn't work even after I fixed it and when I tried to use the code I always got an error for
object reference not set to an instance of an object
I just want to unrar a rar file from a specific location to the root directory of my program so if my program was on the desktop I want it to unrar a file in My documents and extract the files to my desktop.
回答1:
If you just want to unrar files, I Was able to do that with SharpCompress
I created new VB.Net App and added reference to SharpCompress.dll and used this code
'Imports
Imports SharpCompress.Archive
Imports SharpCompress.Common
'Unrar code
Dim archive As IArchive = ArchiveFactory.Open("c:\file.rar")
For Each entry In archive.Entries
If Not entry.IsDirectory Then
Console.WriteLine(entry.FilePath)
entry.WriteToDirectory("c:\unrar",
ExtractOptions.ExtractFullPath Or ExtractOptions.Overwrite)
End If
Next
More code samples
回答2:
for those who will try in vb.net the extract options are renamed and used as
Dim options As New ExtractionOptions With {
.ExtractFullPath = True,
.Overwrite = True
}
entry.WriteToDirectory(Application.StartupPath, options)
来源:https://stackoverflow.com/questions/18522605/unpack-a-rar-file