Dennis,
It was a bad choice of words. I lumped formcreate code into
initialisation. Any non-trivial code to deal with maths, strings,
objects, forms etc can cause exceptions.
One of the things that happens in our apps is that they use a
commandline parameter to determine where the data files are - so
that one exe can work with multiple data sets. This is set in the
datamodule for the project which contains the TDatabase component
for the project. Before I put the try except in, an invalid path
would cause each form to generate multiple exceptions. So I
have trapped it, and that works.
The problem remaining is that the VCL still gives me two (sometimes
3) more exceptions after that. I dont really want to use a
messagebox to display the exception message and use halt. But I
might have to.
Your point about the initialisation code is taken. I hadnt yet
thought about it, but it is a worry as well. There should be
automatic try-except block around the main dpr code.
On 7 May 99 at 11:08, Dennis Chuah wrote:
>
> Rohit,
>
> Firstly, unit initialization happens BEFORE your try-except clause. In
> fact, unit initialization happens BEFORE the begin. So what can you do
> about this?
>
> 1. Put all initialization / finalization code that can raise exceptions
> into procedures in the unit(s).
>
> 2. Create a new unit.
>
> 3. Use the SysUtils unit and the other units with initialization /
> finalization code moved into procedures.
>
> 4. In the initialization section, call all the initialization code. This
> way, if one of them raises an exception, the others will automatically be
> skipped. With this you can also explicitly control the order in which the
> units are initialized.
>
> 5. Do the same for finalization, except that you reverse the order in which
> you call finalization code.
>
> Hope this helps.
>
Rohit
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