System.TObject.MethodAddress
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Delphi Information
From System.pas
class function MethodAddress(const Name: ShortString): Pointer; overload; class function MethodAddress(const Name: string): Pointer; overload;
Unit: System
Type: method
Visibility: public
Member Of: TObject
C++ Information
From System.hpp
__classmethod void * __fastcall MethodAddress(const System::SmallString<255> & Name); __classmethod void * __fastcall MethodAddress(System::UnicodeString Name);
Unit: System
Type: method
Visibility: public
Member Of: TObject
Description
Returns the address of a class method by name.
There are situations when it is useful to invoke an object method without hard coding the method name in advance. Call MethodAddress to dynamically retrieve the address of such a method by specifying the method Name as a string.
An easy way to invoke the method is to define a procedure or function data type, such as:
type TProc = procedure of object;
Assign the object name and the MethodAddress method to a TMethod variable, such as:
MethodVar.Data := Pointer(ObjectInstanceName);
MethodVar.Code := ObjectInstanceName.MethodAddress('MethodNameString');
Pass this in a call to a variable of the procedure or function type:
Proc := TProc(MethodVar);
Proc;