Dynamischer Funktionsaufruf

[alzaimar]

So gehts:

Delphi-Quellcode:

unit Unit4;

interface

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

type
  TForm4 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    procedure ExecMethod(aObject: TObject; MethodName, Param: string);
  published
    procedure Test(Astring: string);
  end;

var
  Form4: TForm4;

implementation

{$R *.dfm}

type
  TStringParamProc = procedure(aString: string) of object;

procedure TForm4.Button1Click(Sender: TObject);
begin
  ExecMethod(Self, 'Test', 'Hallo');
end;

procedure TForm4.Test(Astring: string);
begin
  showmessage('Bingo ' + aString);
end;

procedure TForm4.ExecMethod(aObject: TObject; MethodName, Param: string);
var
  Routine: TMethod;
  Exec: TStringParamProc;

begin
  Routine.Data := Pointer(aObject);
  Routine.Code := aObject.MethodAddress(MethodName);
  if not Assigned(Routine.Code) then Exit;
  Exec := TStringParamProc(Routine);
  Exec(Param);
end;

end.