An unhandled exception of type 'System.Resources.MissingManifestResourceException' occurred in mscorlib.dll
Additional information: Could not find any resources appropriate for the specified culture (or the neutral culture) in the given assembly. Make sure "System.Windows.Forms.resources" was correctly embedded or linked into assembly "System.Windows.Forms".
baseName: System.Windows.Forms locationInfo: <null> resource file name: System.Windows.Forms.resources assembly: System.Windows.Forms, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null
I built the project and stepped through the code in Visual Studio and, as the stack trace really tells us anyway, in line 1403 of FileDialog the code is trying to load an image called "paper" which is in some resource file somewhere. The problem is caused because the code can't find the resource file/can't load the images, because if you step in to the code you'll see at line 400 of ImageList that the list (if you're still debugging) has not images in it, and so retrieves a null reference. At least, that's what I'm seeing :). And, fyi, if you didn't know already, the Managed.Windows.Forms code can be opened, built, and worked on inside of Visual Studio. There is a solution file (\mono\trunk\mcs\class\Managed.Windows.Forms) ready for you to use. You'll have to add a number of files to the project for it to compile correctly, but it only takes a couple minutes to find the files. I just try to compile and see what blows up, and then add the files it can't find.
So, though the differences could be explained in another way, it seems that the error is being thrown by MS's runtime as a MissingManifestResourceException but by the Mono runtime it is not, and is retrieving a null value without throwing said exception, which then causes the ImageList in the FileDialog to throw an exception because it is getting a null image reference.
Of course, that isn't the root cause. The root cause is a missing resource, it seems. That I just don't know how to fix. Anybody out there know that?
Environment:
Running Windows XP
When running Mono runtime, working off of the 1.1.4 installation.
When running using Microsoft's runtime, I'm using the mono SWF library instead of the MS, pulled just about an hour ago from svn.
Eric Sowell
Bill Medland wrote:
On March 28, 2005 04:55 pm, Trimble, Nathan G wrote:
I realize some people on this list may know the status of various
controls at any given moment, but I imagine there are also some lurkers
on the list who may just be trying to learn a little bit about mono.
I'm pretty decent with C# but not real knowledgeable with mono. If you
could post a little code along with your questions I might be able to
try running it too. Just a thought.
Well, Since " Test program simply declares an OpenFileDialog" is clearly not explicit enough:
class ofd01 {
public static void Main () {
System.Windows.Forms.OpenFileDialog ofd = new System.Windows.Forms.OpenFileDialog();
System.Console.WriteLine ("Hello, World");
}
}
Sincerely,
Nate Trimble
-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bill Medland Sent: Monday, March 28, 2005 4:37 PM To: [email protected] Subject: [Mono-winforms-list] OpenFileDialog throwing ArgumentNullException
Can anyone tell me, is this me doing something wrong or is it a current bug in the code?
(Assuming I am doing the build properly) mono is the current version updated 10 minutes ago.
Test program simply declares an OpenFileDialog
Program throws:
Unhandled Exception: System.ArgumentNullException: Cannot add null image Parameter name: value in <0x00104> System.Windows.Forms.ImageList+ImageCollection:Add (System.Drawing.Image value) in <0x001a6> System.Windows.Forms.MWFFileView:.ctor () in (wrapper remoting-invoke-with-check) System.Windows.Forms.MWFFileView:.ctor () in <0x00236> System.Windows.Forms.FileDialog+FileDialogPanel:.ctor (System.Windows.Forms.FileDialog fileDialog) in (wrapper remoting-invoke-with-check) FileDialogPanel:.ctor (System.Windows.Forms.FileDialog) in <0x000ad> System.Windows.Forms.OpenFileDialog:.ctor () in (wrapper remoting-invoke-with-check) System.Windows.Forms.OpenFileDialog:.ctor () in <0x00024> ofd01:Main ()
-- Bill Medland mailto:[EMAIL PROTECTED] http://webhome.idirect.com/~kbmed
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