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+--- Thread: ReaderWmf leaks temporary files (/showthread.php?tid=242)
ReaderWmf leaks temporary files - kguetter - 02-14-2012
I have the following code:
Code:
using (ReaderWmf reader = new ReaderWmf())
{
Image image = reader.ReadGeometry(metaFile, geometrySettings);
// ...
}Every time this section is executed, a EMF file is created in %LOCALAPPDATA%.
There is a first chance exception on the closing brace (i.e. the Dispose call) "The process cannot access the file 'C:\Users\kg\AppData\Local\9333da9f-ef9d-4fd1-ab8a-66d8b0647bc0.emf' because it is being used by another process." Here is the call stack:
Code:
mscorlib.dll!System.IO.__Error.WinIOError(int errorCode = 0x80070020, string maybeFullPath = "C:\\Users\\kg\\AppData\\Local\\9333da9f-ef9d-4fd1-ab8a-66d8b0647bc0.emf") + 0x321 Bytes
mscorlib.dll!System.IO.File.Delete(string path) + 0x99 Bytes
Ab2d.ReaderWmf.dll!Ab2d.ReaderWmf.ر() + 0x6c Bytes
Ab2d.ReaderWmf.dll!Ab2d.ReaderWmf.Dispose(bool disposing = true) + 0x2b Bytes
Ab2d.ReaderWmf.dll!Ab2d.ReaderWmf.Dispose() + 0x22 BytesUsing Sysinternals ProcessExplorer I found that there is no other process having an open handle to the file (only my program itself).
Klaus
Edit: Maybe this is the same problem as in the post "Problem with ReaderWmf Class in Web Service (WCF)". The metaFile variable in my code snippet is indeed a Stream.
RE: ReaderWmf leaks temporary files - kguetter - 02-16-2012
It is indeed the same problem.
As a workaround, I saved the stream to a temporary file, called the ReadGeometry overload taking a file name and then deleted the temporary file again.
RE: ReaderWmf leaks temporary files - abenedik - 02-16-2012
As you have correctly sad, the current version of ReaderWmf creates a temporary file when metafile is read from a stream.
I am preparing a release of a new version of ReaderWmf. I have already implemented reading metafiles directly from memory stream (without temp file). At first I was not aware that this is possible without a temp file, but after some additional investigation I have found a way to do it.
I think that the new version will be available in the next week.
Until than you can use the mentioned workaround.
RE: ReaderWmf leaks temporary files - abenedik - 02-24-2012
I would like to inform you that the new version of ReaderWmf was just released - it does not create a temporary file any more when reading metafile from stream.
It also fixes some other problems.
For more information see the related blog post:
http://blog.wpf-graphics.com/post/2012/02/24/Maintenance-releases-for-all-products-are-now-available.aspx