I'm using C++/CLI with DotNetZip and can't figure out how to close a zip file once I'm done with it. All the examples use the using keyword, as in
\r\nusing (ZipFile zip = new ZipFile("foo.zip"))
\r\n{
\r\n//... etc.
\r\n}
\r\nThis keyword is not supported in C++/CLI, however, and I can't call the Dispose or Finalize methods since they're protected. Is there a way I can cleanly close the file?
", "PostedDate": "2009-09-01T22:44:23.87-07:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "230237", "ThreadId": "67678", "Html": "The no-argument Dispose() method is public.
\r\n"Using" in C# is a shorthand for try....finally { object.Dispose(); } For example,
\r\nusing (var zip = ZipFile.Read("foo.zip")) \r\n{\r\n // etc\r\n}\r\n\r\n
is equivalent to
\r\nvar zip = ZipFile.Read("foo.zip");\r\ntry\r\n{\r\n // etc\r\n}\r\nfinally\r\n{\r\n zip.Dispose();\r\n}\r\n\r\n
", "PostedDate": "2009-09-02T08:17:32.363-07:00", "UserRole": null, "MarkedAsAnswerDate": null }, { "Id": "230306", "ThreadId": "67678", "Html": "
The Dispose() method is protected/private in the installation I downloaded. It turns out that this is the equivalent:
\r\n ZipFile ^ zip;
try
{
zip = gcnew ZipFile("test.zip");
//...
}
finally
{
zip->~ZipFile();
}
Hmm, right. That must be some sort of impedance mismatch between the languages. Here's a DotNetZip "hello world" in C++/CLI:
\r\n// DotNetZip-HelloWorld.cpp\r\n//\r\n\r\n#include "stdafx.h"\r\n\r\nusing namespace System;\r\nusing namespace Ionic::Zip;\r\n\r\nint main(array ^args)\r\n{\r\n Console::WriteLine(L"Hello World");\r\n Console::WriteLine(L"Current directory is {0}", System::IO::Directory::GetCurrentDirectory());\r\n \r\n ZipFile ^ zip;\r\n try\r\n {\r\n zip = gcnew ZipFile();\r\n zip->AddEntry("Readme.txt", "", "This is the content.");\r\n zip->Save("test.zip");\r\n }\r\n finally\r\n {\r\n zip->~ZipFile();\r\n }\r\n\r\n Console::WriteLine(L"Press to quit.");\r\n Console::ReadLine();\r\n return 0;\r\n}\r\n
",
"PostedDate": "2009-09-02T12:30:42.077-07:00",
"UserRole": null,
"MarkedAsAnswerDate": null
},
{
"Id": "447735",
"ThreadId": "67678",
"Html": "Hi Cheeso,\r\nFirst of all, can I just say great library, I really appreciate all the effort you are putting in to develop and support it! I'm using it in a C++/CLI project to create encrypted and potentially multi-spanned archives, which are written to CD (hence the multi-spanning). I also have a small app that auto-launches from the first CD, collates the fragments to a directory on the recipient machine's hard-drive, requests the password and decrypts the archive, attempting to clear up the zip fragments after the extraction is complete.\r\n\r\nAs a follow up to the above discussion, I'm getting an exception when deleting the spanned zip files after extracting, with the error text as follows:\r\n"The process cannot access the file 'xxxx.z01' because it is being used by another process."\r\n\r\nI'm using Ionic.Zip.Reduced.dll v1.9.1.5, on WindowsXP\r\nThe code is broadly as follows:\r\n\r\n...\r\nZipFile^ zip;\r\ntry\r\n{\r\n zip = ZipFile::Read(sourcePath);\r\n zip->Password = password;\r\n zip->ExtractAll(extractPath, ExtractExistingFileAction::OverwriteSilently);\r\n}\r\ncatch(...)\r\n{\r\n}\r\nfinally\r\n{\r\n delete zip;\r\n}\r\n\r\ntry\r\n{\r\n Directory::Delete(sourcePath);\r\n}\r\ncatch(Exception^ ex)\r\n{\r\n}\r\n...\r\n\r\nCouple of notes:\r\n1) I've used 'delete zip' rather than 'zip->~ZipFile()' as this has the same effect and is more idiomatic for C++. (I tried zip->~ZipFile() just incase, but get the same results.)\r\n2) If the zip is a single span, it deletes just fine.\r\n2a) To test, I took out the 'delete zip', and I then get the exception even for single span archives, as you might expect!\r\n3) In Windows Explorer I can not delete any of the zip fragments until the extraction application exits.\r\n\r\nSo, I was wondering if the Dispose method fails to close the zip fragments when dealing with a multi-span archive?\r\n\r\n",
"PostedDate": "2010-05-26T09:39:21.603-07:00",
"UserRole": null,
"MarkedAsAnswerDate": null
},
{
"Id": "447736",
"ThreadId": "67678",
"Html": "Hmmm... don't know what has happened to all the carriage returns in that post. \r\nSorry!",
"PostedDate": "2010-05-26T09:41:42.537-07:00",
"UserRole": null,
"MarkedAsAnswerDate": null
},
{
"Id": "447933",
"ThreadId": "67678",
"Html": "I'd like you to open a new discussion, rather than resurrecting one that is 9 months old.
\r\nThanks.
\r\n", "PostedDate": "2010-05-26T19:38:23.44-07:00", "UserRole": null, "MarkedAsAnswerDate": null } ]