IsPublishedProp
Check whether a published property exists.
Declaration
Source position: typinfo.pp line 881
function IsPublishedProp(Instance: TObject; const PropName: string)
: Boolean;
function IsPublishedProp(AClass: TClass; const PropName: string)
: Boolean;
Description
IsPublishedProp returns true if a class has a published property with name PropName. The class can be specified in one of two ways:
- AClass
- A class pointer to the class.
- Instance
- An instance of the class.
Errors
No checks are done to ensure Instance or AClass are valid pointers. Specifying an invalid property name in PropName will result in an EPropertyError exception.
See also
| Name | Description |
|---|---|
| IsStoredProp | Check whether a property is stored. |
| PropIsType | Check the type of a published property. |
Example
program example10;
{ This program demonstrates the IsPublishedProp function }
{$mode objfpc}
uses rttiobj,typinfo;
Var
O : TMyTestObject;
PI : PPropInfo;
begin
O:=TMyTestObject.Create;
Writeln('Property tests : ');
Write('IsPublishedProp(O,BooleanField) : ');
Writeln(IsPublishedProp(O,'BooleanField'));
Write('IsPublishedProp(Class,BooleanField) : ');
Writeln(IsPublishedProp(O.ClassType,'BooleanField'));
Write('IsPublishedProp(O,SomeField) : ');
Writeln(IsPublishedProp(O,'SomeField'));
Write('IsPublishedProp(Class,SomeField) : ');
Writeln(IsPublishedProp(O.ClassType,'SomeField'));
O.Free;
end.