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04.21.2008 at 03:27AM PDT, ID: 23339018 | Points: 125

	[x] Attachment Details

Getting the value of a constant from the name (in a string)

Zones: Delphi Programming Language, Delphi Programming, Pascal Programming Language

Tags: Delphi

i have a string with the name of a constant i need to get the value of that constant
in Delphi

Ideas?

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Question Stats

Zone: Programming

Question Asked By: JodieP

Question Asked On: 04.21.2008

Participating Experts: 8

Points: 125

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04.21.2008 at 03:35AM PDT, ID: 21400146

Geert_Gruwez:

Something like this ?

const
A = 'A';
B = 'A';

Name of 'A' --> not possible ...

04.21.2008 at 03:37AM PDT, ID: 21400160

Rank: Wizard

MerijnB:

what you want is not possible.

Does is have to be an constant?

04.21.2008 at 03:43AM PDT, ID: 21400196

Rank: Guru

rfwoolf:

Perhaps you can tell us more about your situation.

04.21.2008 at 03:57AM PDT, ID: 21400289

Rank: Wizard

TheRealLoki:

well, actually, it depends on what kind of constant it is
lets say you are using enums, you can use GetEnuName

eg.

Here's how to display the string represention of a Delphi enum type at runtime.

~~~~~~~~~~~~~~~~~~~~~~~~~
{
Suppose enum:

TProgrammerType = (tpDelphi, tpVisualC, tpVB, tpJava) ;
}

uses TypInfo;
var s: string;
s := GetEnumName(TypeInfo(TProgrammerType),
integer(tpDelphi)) ;

//s='tpDelphi'

04.21.2008 at 04:04AM PDT, ID: 21400339

Rank: Sage

ciuly:

and again if you declare the constant as a resourcestring, you can get the value, but it's a little bit more complicated and you would need to have the drc file as well in your exe (probably embedding it as a resource as well).

04.21.2008 at 04:11AM PDT, ID: 21400392

JodieP:

well i m reading the names of the variables from a file
the file format cannot be changed

There are about 700 variables names in the file

04.21.2008 at 04:14AM PDT, ID: 21400409

Rank: Wizard

MerijnB:

but can you change the way this data is stored in your app?

are these all constants, variables? Can you keep them in a stringlist instead?

04.21.2008 at 04:22AM PDT, ID: 21400439

JodieP:

these are all constants
I dont think i can change these constants as tehy are used all over the system

how could i add them to a stringlist?

04.21.2008 at 04:28AM PDT, ID: 21400481

Rank: Wizard

MerijnB:

by using the stringlist in a key - value way:

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