This is the call that generates the error (in the designer generated
InitializeComponent()) :
this.label1.Font = new System.Drawing.Font("Microsoft Sans Serif", 10F,
System.Drawing.FontStyle.Bold, System.Drawing.GraphicsUnit.Point,
((System.Byte)(0)));
The stack calls shown when the exception is thrown :
system.drawing.dll!System.Drawing.Font::Initialize(System.Drawing.FontFa
mily family = {Name="Microsoft Sans Serif"}, float emSize = 10.0,
System.Drawing.FontStyle style = Bold, System.Drawing.GraphicsUnit unit
= Point, unsigned char gdiCharSet = 0 '', bool gdiVerticalFont = false)
+ 0x4f bytes
system.drawing.dll!System.Drawing.Font::Font(String* familyName =
"Microsoft Sans Serif", float emSize = 10.0, System.Drawing.FontStyle
style = Bold, System.Drawing.GraphicsUnit unit = Point, unsigned char
gdiCharSet = 0 '') + 0x69 bytes
In the System.Drawing.Font constructor the "(System.Byte)(0)" value for
gdiCharSet actually ends up as "0 ''". Is this correct? It doesn't look
right to me, I would have expected "''" or "'0'".
I am probably way off track here, I just cannot understand where this is
going wrong.
Paul Jefferies
-----Original Message-----
From: Paul Jefferies
Sent: 30 May 2002 10:37
To: [EMAIL PROTECTED]
Subject: Re: [DOTNET] System.Drawing.dll Exception??
Hi all,
I am still having the same problem, when the control is added
dynamically at runtime each time it is needed. I also ensure that it is
removed from the main form's controls collection and set to null, before
I create the new dialog form.
Any advice at all will be welcomed.
Paul Jefferies
-----Original Message-----
From: Paul Jefferies
Sent: 29 May 2002 12:59
To: [EMAIL PROTECTED]
Subject: [DOTNET] System.Drawing.dll Exception??
Hi,
I have a simple C# winforms app, which uses a control developed by one
of my colleagues.
This control manages the import of data from a csv file to a database.
It declares an interface that the main form implements in order to
provide the customization for the actual task of importing the data. The
problem I am having is when the import is in progress and is then
cancelled (by the use of a button on the control), if I subsequently
create another form (e.g. About dialogbox) I get an exception when
initializing the form - but only if the form has to create a new
System.Drawing.Font (like when a label doesn't have the default font
settings).
The exception message is :
An unhandled exception of type 'System.ArithmeticException'
occurred in system.drawing.dll
Additional information: Overflow or underflow in the arithmetic
operation.
Now if the import actually completes, this does not happen. The event to
cancel the import just sets a flag that the import routines checks
before each line is imported, then the control follows the same code
path as if the import reached the end of the input file.
I have tried resetting the control back to how it was to begin with -
still the same.
I am at a loss here as to how to chase this problem down. Any pointers
will be greatly appreciated.
Has anyone encountered a problem like this before?
I know this probably doesn't give you all the info you need, I am more
than happy to provide more detail where needed.
Regads,
Paul Jefferies
Adastra Software Ltd
www.adastra.co.uk
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