Comments for Jopsen.dk/blog

Comment on Version 0.10 of zbar-sharp is out… by David

David — Fri, 13 Jan 2012 08:11:57 +0000

@kh: Tried your Solution but there is always the same point where the debugger stops:

///
/// Get/set the data associated with this image
///
/// This method copies that data, using Marshal.Copy.
public byte[] Data{
get{
IntPtr pData = zbar_image_get_data(this.handle);
if(pData == IntPtr.Zero)
throw new Exception(“Image data pointer is null!”);
uint length = zbar_image_get_data_length(this.handle);
byte[] data = new byte[length];
Marshal.Copy(pData, data, 0, (int)length);
return data;
}
set{
IntPtr data = Marshal.AllocHGlobal(value.Length);
Marshal.Copy(value, 0, data, value.Length);
zbar_image_set_data(this.handle, data, (uint)value.Length, Image.CleanupHandler);
}
}

When zbar_image_set_data is called, VB gives back a PInvokeFailure. I think there is something wrong with the values given over to this function..

Comment on Version 0.10 of zbar-sharp is out… by Jonas Finnemann Jensen

Jonas Finnemann Jensen — Fri, 06 Jan 2012 12:48:59 +0000

Interesting, my Windows (R) skills are pretty old, but I do imagine that it possible to use the library without installing it globally…

Comment on Version 0.10 of zbar-sharp is out… by kh

kh — Thu, 05 Jan 2012 15:56:54 +0000

Solution for
Unable to load DLL ‘libzbar’: The specified module could not be found.
First
install zbar-0.10-setup.exe you can download http://sourceforge.net/projects/zbar/files/zbar/0.10/zbar-0.10-setup.exe/download

Second
Copy all Dll Files from C:\Program Files\ZBar\bin
to
C:\WINDOWS\system32
and rename libzbar-0.dll to libzbar.dll

without regsvr32 its will work
bye

Comment on Version 0.10 of zbar-sharp is out… by David

David — Fri, 23 Dec 2011 07:22:17 +0000

Yes, I did it with Visual Studio, and there were no problems. Maybe you could try building a small example in vb.net to look whether it works or not. Or maybe you know someone who made it with vb.net.
Thanks in advance for your help!

Comment on Version 0.10 of zbar-sharp is out… by Jonas Finnemann Jensen

Jonas Finnemann Jensen — Fri, 16 Dec 2011 13:28:03 +0000

Possible, but I don’t think zbar have been updated recently.
Have you tried to build the image-scanner example from github?
If you remove gtkzbar-cil and gtk-scanner projects from the solution, it should build without any complications.

Comment on Version 0.10 of zbar-sharp is out… by David

David — Fri, 16 Dec 2011 12:38:06 +0000

Could it be, that die libzbar.dll from the WindowsInstaller Packet of Zbar is not compatible with your dll? I think the Pinvoke Failure could occur because of an wrong calling.

Comment on Version 0.10 of zbar-sharp is out… by David

David — Fri, 16 Dec 2011 10:06:48 +0000

Hey Jonas, look here, i made a screenshot for you – thats the problem:

http://imageshack.us/photo/my-images/521/screenshotmw.jpg/

I can go through the code, but then there is no result.

Comment on Version 0.10 of zbar-sharp is out… by David

David — Fri, 16 Dec 2011 07:06:12 +0000

Yes I did! Thats my problem, i thought the same and looked up in my debug folder, but I copied all files from the zbar bin folder, so it should work..

Comment on Version 0.10 of zbar-sharp is out… by Jonas Finnemann Jensen

Jonas Finnemann Jensen — Sun, 11 Dec 2011 20:02:21 +0000

Did you rename libzbar-0.dll to libzbar.dll, if not that’s your issue.
libzbar-cil.dll assumes the zbar dll is called libzbar.dll and libzbar-0.dll

Comment on Version 0.10 of zbar-sharp is out… by David

David — Fri, 09 Dec 2011 13:24:28 +0000

Some more Information:

Eine Ausnahme (erste Chance) des Typs “System.DllNotFoundException” ist in libzbar-cil.dll aufgetreten.
Eine Ausnahme (erste Chance) des Typs “System.DllNotFoundException” ist in libzbar-cil.dll aufgetreten.
Eine Ausnahme (erste Chance) des Typs “System.DllNotFoundException” ist in libzbar-cil.dll aufgetreten.