Still celebrating National IT Professionals Day with 3 months of free Premium Membership. Use Code ITDAY17

x
?
Solved

Dynamic Form Creation

Posted on 1997-05-11
2
Medium Priority
?
183 Views
Last Modified: 2010-05-18
Hiya,

Is it possible to instantiate objects (specifically a TForm) dynamically
at run-time from a String with value := to the name of a specific form?
I'm assuming it's not possible to store the Form object itself in a
Paradox table but I could store the name of the Form as a string, no?

Any little code snippet would be appreciated.

Thanks,
 Bob Skinner

rskinner@ix.netcom.com
0
Comment
Question by:skin444
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 3

Accepted Solution

by:
sperling earned 100 total points
ID: 1336127
It is possible to create a form based on the name of the class.

Form1 is of class TForm1
FormMain is of class TForm2

This requires you to add code to register the forms in the initialization section of the units. The following code works under Delphi 3, I'm not sure whether D2 will accept it.

----------------------
unit Unit1;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls;

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);
var
  fc      : TPersistentClass;
  f       : TForm;
begin
  fc := GetClass('TForm2');
  if fc <> nil then begin
    f :=  TFormClass(fc).Create(Application);
    f.Show;
  end;
end;

initialization
  RegisterClass (TForm1);
end.
------------------------------------
unit Unit2;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs;

type
  TForm2 = class(TForm)
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form2: TForm2;

implementation

{$R *.DFM}

initialization
  RegisterClass (TForm2);
end.
-----------------------



0
 

Author Comment

by:skin444
ID: 1336128

Thanks sperling!

It does work under D2.  Code sample was just what I was looking for.

-Bob
0

Featured Post

Concerto's Cloud Advisory Services

Want to avoid the missteps to gaining all the benefits of the cloud? Learn more about the different assessment options from our Cloud Advisory team.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Objective: - This article will help user in how to convert their numeric value become words. How to use 1. You can copy this code in your Unit as function 2. than you can perform your function by type this code The Code   (CODE) The Im…
Introduction Raise your hands if you were as upset with FireMonkey as I was when I discovered that there was no TListview.  I use TListView in almost all of my applications I've written, and I was not going to compromise by resorting to TStringGrid…
Have you created a query with information for a calendar? ... and then, abra-cadabra, the calendar is done?! I am going to show you how to make that happen. Visualize your data!  ... really see it To use the code to create a calendar from a q…
We’ve all felt that sense of false security before—locking down external access to a database or component and feeling like we’ve done all we need to do to secure company data. But that feeling is fleeting. Attacks these days can happen in many w…
Suggested Courses

670 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question