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BUG: Printing Problem

Hi,

I am working on the PrintDocument, PrintDialog, PageSetupDialog and
PrintPreviewControl components of Visual Studio .NET 2003. My developement
machine is running Windows XP.

There are some problems I encountered while using them. Please note that,
the Regional and Language setting on my machine is using "Metric"
measurement system (where the default is "US"). In this case, the
measurement unit is "milimeters" and not "inches".
PROBLEM #1
``````````````
The first problem is with PageSetupDialog. The following code,

Dim pagesettings As System.Drawing.Printing.PageSettings
Dim pagesetupdialog As System.Windows.Forms.PageSetupDialog

pagesettings = New System.Drawing.Printing.PageSettings
With pagesettings.Margins
.Left = 100
.Right = 100
.Top = 100
.Bottom = 100
End With

pagesetupdialog = New System.Windows.Forms.PageSetupDialog
With pagesetupdialog
.PageSettings = pagesettings
.ShowDialog()
End With

' Values printed out are not the same as entered
With pagesettings.Margins
Console.WriteLine(.Left)
Console.WriteLine(.Right)
Console.WriteLine(.Top)
Console.WriteLine(.Bottom)
End With

will reproduce the problem I'm facing.

Before calling the ShowDialog() method of the PageSetupDialog component, I
have already set the Margins to 100. Although my OS's measurement system is
set to "Metric", Visual Studio .NET still uses inches (0.01 in) for it's
measurement unit. In my case, the Margins are set to 1 inch.

On calling the ShowDialog() method, what you see is the margins are all set
to 10 (and the unit is milimeters). On clicking the OK button, the
PageSetupDialog component will convert the value entered in it's dialog to
inches (0.01 in). As the result, the margins after the ShowDialog() is
called are changed to 39 (100/2.54=39.xxxxxx).

This surely is a BUG (or am I missing something here).

I have a solution for this problem and the code is as below.

Dim pagesettings As System.Drawing.Printing.PageSettings
Dim pagesetupdialog As System.Windows.Forms.PageSetupDialog

pagesettings = New System.Drawing.Printing.PageSettings
With pagesettings.Margins
.Left = 100
.Right = 100
.Top = 100
.Bottom = 100
End With

pagesetupdialog = New System.Windows.Forms.PageSetupDialog
With pagesetupdialog
.PageSettings = pagesettings

' Keep the original setting
Dim marginSaved As System.Drawing.Printing.Margins
marginSaved = pagesettings.Margins

' Convert to milimeters
pagesettings.Margins =
System.Drawing.Printing.PrinterUnitConvert.Convert (pagesettings.Margins,
System.Drawing.Printing.PrinterUnit.Display,
System.Drawing.Printing.PrinterUnit.TenthsOfAMilli meter)

' Show the page setup dialog
If .ShowDialog() = DialogResult.Cancel Then
' If user clicked Cancel, restore the saved margin
pagesettings.Margins = marginSaved
End If
End With

With pagesettings.Margins
Console.WriteLine(.Left)
Console.WriteLine(.Right)
Console.WriteLine(.Top)
Console.WriteLine(.Bottom)
End With

But there is a problem with it. The conversion between milimeters and inches
causes the measurement to be inaccurate.
PROBLEM #2
``````````
The OriginAtMargins property of the PrintDocument component does not work
properly when the PrintDocument is added into the PrintPreviewControl.
Setting the value to True does not effect the preview shown by
PrintPreviewControl but the printed result is correct.
PROBLEM #3
``````````
When handling the PrintPage event of the PrintDocument, if the
OriginAtMargins of the PrintDocument is set to True and I set,

e.Graphics.PageUnit = GraphicsUnit.Millimeter

then the top margin is measured as milimeters while the left margin is
measured as inches.
The problem discuss above might not be bugs but I have checked the MSDN
library but it does not seem to help much. Any help is really appreciated.

Thanks in advance.

Jul 21 '05 #1
0 2078

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