[Mono-bugs] [Bug 424981] New: Winforms does not have a fallback for a missing mime type

[bugzilla_noreply at novell.com]

https://bugzilla.novell.com/show_bug.cgi?id=424981


           Summary: Winforms does not have a fallback for a missing mime
                    type
           Product: Mono: Class Libraries
           Version: 2.0
          Platform: i386
        OS/Version: Linux
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Windows.Forms
        AssignedTo: mono-bugs at lists.ximian.com
        ReportedBy: paul at all-the-johnsons.co.uk
         QAContact: mono-bugs at lists.ximian.com
          Found By: ---


The following code causes a winforms application to fail if the system does not
have a mime type set for a .spec file (and possibly for other files)

private string createDialog()
                {
                        OpenFileDialog filer = new OpenFileDialog();
                        filer.Filter = "spec files (*.spec)|*.spec";
                        filer.Title = "Select a spec file";
                        return ( filer.ShowDialog() == DialogResult.OK )
                                ? filer.FileName : null;
                }

                private void button1Click(object sender, EventArgs e)
                {
                        createDialog();
                }

The app falls over with the following throwback

Unhandled Exception: System.ArgumentNullException: Argument cannot be
null.
Parameter name: value
  at System.Windows.Forms.ImageList+ImageCollection+ImageListItem..ctor
(System.Drawing.Image value) [0x0003b]
in
/home/paul/rpmbuild/BUILD/mono-2.0/mcs/class/Managed.Windows.Forms/System.Windows.Forms/ImageList.cs:202 
  at System.Windows.Forms.ImageList+ImageCollection+ImageListItem..ctor
(System.Drawing.Image value, Color transparentColor) [0x00000]
in /home/paul/rpmbuild/BUILD/mono-2.0/mcs/build/common/Consts.cs:1 
  at System.Windows.Forms.ImageList+ImageCollection.Add
(System.Drawing.Image value, Color transparentColor) [0x00000]
in
/home/paul/rpmbuild/BUILD/mono-2.0/mcs/class/Managed.Windows.Forms/System.Windows.Forms/ImageList.cs:716 
  at System.Windows.Forms.GnomeHandler.AddAndGetIconIndex (System.String
filename, System.String mime_type) [0x0000c]
in
/home/paul/rpmbuild/BUILD/mono-2.0/mcs/class/Managed.Windows.Forms/System.Windows.Forms/MimeIcon.cs:374 
  at System.Windows.Forms.MimeIconEngine.GetIconIndexForFile
(System.String full_filename) [0x0006b]
in
/home/paul/rpmbuild/BUILD/mono-2.0/mcs/class/Managed.Windows.Forms/System.Windows.Forms/MimeIcon.cs:159 
  at System.Windows.Forms.FileSystem.GetFileFSEntry (System.IO.FileInfo
fileinfo) [0x00043]
in
/home/paul/rpmbuild/BUILD/mono-2.0/mcs/class/Managed.Windows.Forms/System.Windows.Forms/FileDialog.cs:3597 
  at System.Windows.Forms.FileSystem.GetNormalFolderContent
(System.String from_folder,
System.Collections.Specialized.StringCollection filters,
System.Collections.ArrayList& directories_out,
System.Collections.ArrayList& files_out) [0x000ea]
in
/home/paul/rpmbuild/BUILD/mono-2.0/mcs/class/Managed.Windows.Forms/System.Windows.Forms/FileDialog.cs:3543 
  at System.Windows.Forms.FileSystem.GetFolderContent
(System.Collections.Specialized.StringCollection filters,
System.Collections.ArrayList& directories_out,
System.Collections.ArrayList& files_out) [0x0016f]
in
/home/paul/rpmbuild/BUILD/mono-2.0/mcs/class/Managed.Windows.Forms/System.Windows.Forms/FileDialog.cs:3465 
  at System.Windows.Forms.MWFVFS+WorkerThread.GetFolderContentThread ()
[0x00000]
in
/home/paul/rpmbuild/BUILD/mono-2.0/mcs/class/Managed.Windows.Forms/System.Windows.Forms/FileDialog.cs:3240 


The application was terminated by a signal: SIGHUP


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