I'm trying to download and extract a zip file in C#, specifically DotNetZip.
When I run this code...
HttpWebRequest webRequest = (HttpWebRequest)WebRequest.Create(reportUrl);
HttpWebResponse response = (HttpWebResponse)webRequest.GetResponse();
Stream stream = response.GetResponseStream();
MemoryStream ms = new MemoryStream();
stream.CopyTo(ms);
ms.Seek(0, 0);
ZipInputStream zip = new ZipInputStream(ms);
zip.Seek(0, 0);
ZipEntry e = zip.GetNextEntry();
string s = e.FileName;
MemoryStream ms2 = new MemoryStream();
e.Extract(ms2);
After the Extract method executes, I get...
$exception {"Object reference not set to an instance of an object."} System.Exception {System.NullReferenceException}
Any thoughts? Thanks!
It's difficult to say why your code doesn't work. I would start by simplifying it and ensuring that I am properly disposing all disposable resources such as streams:
class Program
{
static void Main()
{
var url = "http://downloads.sourceforge.net/project/junit/junit/3.8.1/junit3.8.1.zip";
using (var client = new WebClient())
using (var zip = ZipFile.Read(client.DownloadData(url)))
{
foreach (var entry in zip)
{
entry.Extract(".");
}
}
}
}
Make sure you checkout the documentation for many useful examples of using the DotNetZip library.