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Date Posted: 18:05:44 01/22/02 Tue
Author: Michel
Subject: Re: Exception Handling
In reply to: Vern Six 's message, "Re: Exception Handling" on 10:32:44 01/22/02 Tue

Hi Vern,

Yes I did get confused with another similar question where the user was trying to catch exceptions to determine the graphic format from the data bytes.

This is a little strange. The except section should be executed. You have tried,

on E:Exception which is getting me confused. If an exception is raised it should be handled by the except block. You do you mean by "falling over badly"?

Why is an exception being raised? Are you sure this is a JPG file. If you are trying to determine if the file is a JPEG, with data other than JPEG you may get bad memory corruption. If you need to know if a file is a JPEG in before calling LoadFromFile, let me know, I have some code snippets for this.

Best regards,


>>If I recall, you are trying to read a blob field but
>>you don't know the file format.
>Nope. Sorry... you must be confusing me with someone
>else. I am merely trying to do the following bit of
>code and it's falling over badly...
> jpgGraphic.LoadFromFile('somefile.txt');
> on e: EInvalidGraphic do begin
> logerror( e.message );
> end;
>Any clues? I've even tried on E: EException, etc

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