Question about constants, variables and initialization

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2 total messages Started by Sleiman Thu, 10 May 2001 09:11

#176

Author: Sleiman
Date: Thu, 10 May 2001 09:11

42 lines
2859 bytes

Hello

So far I had the name of the database hard-coded into my cgi script
code, as in
        const myDBname = 'isl';
in a unit called Common that is used in all other units. Currently I am
working on making the cgi script take that value from an INI file, but I
am having difficulty in positioning the code that does that. I mean,
where shall I call the subroutine that reads the INI file? I tried the
following and none of it works:
1) In the Initialization part of the unit Common.
2) In the TWM.WMCreate subroutine.
3) I even tried to have myDBname as a global variable and hard-code
        myDBName:='isl';
into the Initialization part of Common.

In all the above cases the cgi script produces a message such as:
>Open table Quote: Quote_no-Data base server error.
>Table does not exist. File or directory does not exist.
>File: d:\sol\gwdb2\isapi\Quote.DB
(this happens when wanting to open the Quote table of the isl database)

It seems to me that the task is rather simple, but I have to initialise
the database name in the right place. A couple more things I'd like to
mention:
I. In TWM.WMCreate subroutine, I need the myDBName value, since there is
the statement:
    Database.DatabaseName := myDBName;
So wherever myDBName is initialized it has to be before that statement
(in the TWM.WMCreate subroutine or in a different subroutine that is
executed before it).
That statement can also move to some other place, if its location is not
appropriate.
II. I want to be able to terminate the application with an appropriate
error message if reading from the INI file failed. I thought I'd  check
this in the TWM.WebModuleBeforeDispatch subroutine (if reading the INI
file failed, a global variable ReadINIerrorMsg becomes non-blank).

Do you have any idea/tip about this?

Many thanks for your attention
Sleiman

Re: Question about constants, variables and initialization

#177

Author: M.H. Avegaart
Date: Tue, 08 May 2001 11:58

49 lines
3234 bytes

Use a TDatabase component and add the code to the BeforeConnect event.


"Sleiman" <sleiman@hkisl.net> schreef in bericht
news:3AFA5B33.78257C3D@hkisl.net...
> Hello
>
> So far I had the name of the database hard-coded into my cgi script
> code, as in
>         const myDBname = 'isl';
> in a unit called Common that is used in all other units. Currently I am
> working on making the cgi script take that value from an INI file, but I
> am having difficulty in positioning the code that does that. I mean,
> where shall I call the subroutine that reads the INI file? I tried the
> following and none of it works:
> 1) In the Initialization part of the unit Common.
> 2) In the TWM.WMCreate subroutine.
> 3) I even tried to have myDBname as a global variable and hard-code
>         myDBName:='isl';
> into the Initialization part of Common.
>
> In all the above cases the cgi script produces a message such as:
> >Open table Quote: Quote_no-Data base server error.
> >Table does not exist. File or directory does not exist.
> >File: d:\sol\gwdb2\isapi\Quote.DB
> (this happens when wanting to open the Quote table of the isl database)
>
> It seems to me that the task is rather simple, but I have to initialise
> the database name in the right place. A couple more things I'd like to
> mention:
> I. In TWM.WMCreate subroutine, I need the myDBName value, since there is
> the statement:
>     Database.DatabaseName := myDBName;
> So wherever myDBName is initialized it has to be before that statement
> (in the TWM.WMCreate subroutine or in a different subroutine that is
> executed before it).
> That statement can also move to some other place, if its location is not
> appropriate.
> II. I want to be able to terminate the application with an appropriate
> error message if reading from the INI file failed. I thought I'd  check
> this in the TWM.WebModuleBeforeDispatch subroutine (if reading the INI
> file failed, a global variable ReadINIerrorMsg becomes non-blank).
>
> Do you have any idea/tip about this?
>
> Many thanks for your attention
> Sleiman
>
>

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