Printer class: selection errors

[TimStone]

This is from a client ... and I need to trap it.

Using the tPrinter class for a report:
1). Using PRINT oPrn NAME "Workorder Printing" FROM USER // Send to user selected printer
2).The printer selection dialog pops up.
3) Instead of selecting a printer, the user clicks the Cancel button
4). The program gets a Windows error that the program has stopped working.

How can I trap and respond to this cancel button ?

Please ... don't ask me why he does this. That is beyond me since he has many other options in the process where he can cancel, but he does it here ...

[Enrico Maria Giordano]

The following sample doesn't error out here. Please change it to show the error.

Code: Select all

#include "Fivewin.ch"


FUNCTION MAIN()

    LOCAL oDlg

    DEFINE DIALOG oDlg

    @ 1, 1 BUTTON "Print";
           ACTION PRINT()

    ACTIVATE DIALOG oDlg;
             CENTER

    RETURN NIL


STATIC FUNCTION PRINT()

    LOCAL oPrn

    PRINT oPrn NAME "Test" FROM USER PREVIEW
        PAGE
            oPrn:Say( 0, 0, "Test" )
        ENDPAGE
    ENDPRINT

    RETURN NIL

EMG

[TimStone]

The following sample doesn't error out here. Please change it to show the error.

EMG

Remove PREVIEW, then when the printer selection dialog appears, hit Cancel.

If Cancel is selected, then oPrn is not created ( I assume ), so it's possible other actions involving oPrn would then fail. How can I trap for that Cancel ?


Sent from my iPhone using Tapatalk

[Enrico Maria Giordano]

I removed PREVIEW clause: still no errors clicking Cancel button.

EMG

[TimStone]

OK ... It's just on one very complex invoice print routine.

I suppose it's time to go back and do a section by section "comment out" test to find where it creates the error ... and see if some of my code perhaps conflicts with the class.

Thanks for looking at that.

Of course I have no idea why the client is doing this ...

Tim

[dtussman]

I always use this and it works:

PRINT oprn name pname from user
IF EMPTY( oprn:hdc )
RETURN nil
ENDIF

[TimStone]

Thanks ... works perfectly in this case.