dotnet drawing api: PrintPreviewControl not working on some machines -- dotnet drawing api

Re: PrintPreviewControl not working on some machines

jaredljensen NO[at]SPAM hotmail.com
12/30/2005 11:15:59 AM

Thanks Veikka. I searched the bug list and found 5 entries, none of
which described the same problem unfortunately.

Do you know if the PrintPreviewControl is supposed to work on a machine
with no printers installed? The PrintPreviewDialog works in this
scenario, but the PrintPreviewControl does not. I'm not sure if this
is by design or not.

Jared

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Re: PrintPreviewControl not working on some machines

Andrew Smith (Infragistics)
12/30/2005 3:10:11 PM

I believe it needs a printer installed so that it can create the appropriate
device context upon which to base the dpi, etc. I don't see how the
printpreviewdialog would work when the printpreviewcontrol does not as the
printpreviewdialog contains a printpreviewcontrol that is used to generate
and display the preview pages. With regards to the problem, the
printpreviewcontrol initiates the print when it gets a paint message so its
possible that its trying to print before events can be raised. This could be
why it seems as though the printpreviewdialog is working while the
printpreviewcontrol is not. One thing that you might try is to call the
printpreviewcontrol's InvalidatePreview method - perhaps in the form load -
so that it will regenerate the preview.

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Re: PrintPreviewControl not working on some machines

Jared
12/30/2005 4:10:40 PM

My bad. When no printers are installed, the PrintPreviewDialog throws
an exception, but the PrintPreviewControl does not. This is probably
by design, and the printer check must just be something you "get" with
PrintPreviewDialog.

Using InvalidatePreview() worked! Interestingly, I had tried Refresh()
without success.

Thanks so much for your help! Cheers!

Re: PrintPreviewControl not working on some machines

Veikka
12/30/2005 5:22:34 PM

If I remember rigth, MSDN support pages contained some topics
considering error you described.

I'm not sure but I remembered that you should give a right parameter
to PrinterSettings ??? class that it would print at least one page.

Check it out from Support pages.

My problem couple weeks ago was that I could not print without
showing PrintDialog (there is a flag variable that should support this, but
I is a bug).

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