asked on

problem with DriveComboBox

Hi experts,

I have a form with a DriveComboBox in my program. This ComboBox displays all drives on my PC (harddisk,floppy drive,cd-rom drive,
JAZ-drive)

If I try to select a file from the harddisk, everthing works perfectly. However if I try to select a file from
floppy disk/CD-ROM/JAZ-drive, this will cause a run-time error, if there is no medium inserted in the
floppy disk/CD-ROM/JAZ-drive.
(Delphi says: "exception of class ElnOutError. I/O error 21.

How can I work around this problem? Can you please show me a sample source code which fixes this problem?

With kind regards

Mathes

martin_g

It's not great but will probably work!

Include an exception handler such as

procedure TForm1.DriveComboBox1Change(Sender: TObject);
begin
try

except on EINOUTError do
ShowMessage('Drive not available');
end;
end;

ASKER CERTIFIED SOLUTION

philipleighs

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mathes

ASKER

Dear Phil,

thank you for your feedback. Can you please tell me, how I can empty
the DirList property. Whenever I tried your routine in my sample code, the
DirListbox was never empty and therefore I got a runtime error.

With kind regards

Mathes

philipleighs

Real easy, in the designer click the DriveCombo component, open object inspector, click the DirList property and press Delete, Enter. Now run the program!

Regards,
Phil.

mathes

ASKER

Thank you for your help. This is exactly what I was looking for.

With kind regards

Mathes