Как получить значение свойства в виде варианта по тексту имени свойства?
Как получить значение свойства в виде варианта по тексту имени свойства?
unitMorePropInfo;
interface
uses
Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs, StdCtrls;
type
TFrmMorePropInfo = class(TForm)
Button1: TButton;
Button2: TButton;
ListBox1: TListBox;
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
FrmMorePropInfo: TFrmMorePropInfo;
implementation
{$R *.DFM}
uses
TypInfo;
procedure GetPropertyValues(AObj: TObject; AValues: TStrings);
var
count: integer;
data: PTypeData;
default: string;
i: integer;
info: PTypeInfo;
propList: PPropList;
propInfo: PPropInfo;
propName: string;
value: variant;
begin
info := AObj.ClassInfo;
data := GetTypeData(info);
GetMem(propList, data^.PropCount * SizeOf(PPropInfo));
try
count := GetPropList(info, tkAny, propList);
for i := 0 to count - 1 do
begin
propName := propList^[i]^.Name;
propInfo := GetPropInfo(info, propName);
if propInfo <> nil then
begin
case propInfo^.PropType^.Kind of
tkClass, tkMethod:
value := '$' + IntToHex(GetOrdProp(AObj, propInfo), 8);
tkFloat:
value := GetFloatProp(AObj, propInfo);
tkInteger:
value := GetOrdProp(AObj, propInfo);
tkString, tkLString, tkWString:
value := GetStrProp(AObj, propInfo);
tkEnumeration:
value := GetEnumProp(AObj, propInfo);
else
value := '???';
end;
if propInfo.default = longint($80000000) then
default := 'none'
else
default := IntToStr(propInfo.default);
AValues.Add(Format('%s: %s [default: %s]', [propName, value, default]));
{$80000000 apparently indicates "no default"}
end;
end;
finally
FreeMem(propList, data^.PropCount * SizeOf(PPropInfo));
end;
end;
procedure TFrmMorePropInfo.Button2Click(Sender: TObject);
var
count: integer;
data: PTypeData;
i: integer;
info: PTypeInfo;
propList: PPropList;
propInfo: PPropInfo;
propName: string;
propVal: variant;
tmpS: string;
begin
info := Button2.ClassInfo;
data := GetTypeData(info);
GetMem(propList, data^.PropCount * SizeOf(PPropInfo));
try
count := GetPropList(info, tkAny, propList);
ListBox1.Clear;
for i := 0 to count - 1 do
begin
propName := propList^[i]^.Name;
propInfo := GetPropInfo(info, propName);
if propInfo <> nil then
begin
case propInfo^.PropType^.Kind of
tkClass, tkMethod:
propVal := '$' + IntToHex(GetOrdProp(Button2, propInfo), 8);
tkFloat:
propVal := GetFloatProp(Button2, propInfo);
tkInteger:
propVal := GetOrdProp(Button2, propInfo);
tkString, tkLString, tkWString:
propVal := GetStrProp(Button2, propInfo);
tkEnumeration:
propVal := GetEnumProp(Button2, propInfo);
else
propVal := '...';
end;
tmpS := propVal;
ListBox1.Items.Add(Format('%s: %s [default: %s]', [propName, tmpS, '$'
+ IntToHex(propInfo.default, 8)]));
{$80000000 apparently indicates "no default"}
end;
end;
finally
FreeMem(propList, data^.PropCount * SizeOf(PPropInfo));
end;
end;
end.
Tip by Ralph Friedman