[Overview][Constants][Types][Classes][Procedures and functions][Index] | Reference for unit 'TypInfo' (#rtl)

# GetSetProp

Return the value of a set property.

## Declaration

Source position: typinfo.pp line 799

`function GetSetProp(`
`Instance: TObject;`
`const PropName: string`
`):string; function GetSetProp(`
`Instance: TObject;`
`const PropName: string;`
`Brackets: Boolean`
`):string; function GetSetProp(`
`Instance: TObject;`
`const PropInfo: PPropInfo;`
`Brackets: Boolean`
`):string;`

## Description

GetSetProp returns the contents of a set property as a string. The property to be returned can be specified by it's name in PropName or by its property information in PropInfo.

The returned set is a string representation of the elements in the set as returned by SetToString. The Brackets option can be used to enclose the string representation in square brackets.

## Errors

No checking is done whether Instance is non-nil, or whether PropInfo describes a valid ordinal property of Instance Specifying an invalid property name in PropName will result in an EPropertyError exception.

## See also

SetSetProp |  | Set value of set-typed property.
GetStrProp |  | Return the value of a string property.
GetFloatProp |  | Return value of floating point property
GetInt64Prop |  | return value of an Int64 property
GetMethodProp |  | Return value of a method property

## Example

    program example7;

    { This program demonstrates the GetSetProp function }

    {$mode objfpc}

    uses rttiobj,typinfo;

    Var
      O : TMyTestObject;
      PI : PPropInfo;

    Function SetAsString (ASet : TMyEnums) : String;

    Var
      i : TmyEnum;

    begin
      result:='';
      For i:=mefirst to methird do
        If i in ASet then
          begin
          If (Result<>'') then
            Result:=Result+',';
          Result:=Result+MyEnumNames[i];
          end;
    end;

    Var
      S : TMyEnums;

    begin
      O:=TMyTestObject.Create;
      O.SetField:=[mefirst,meSecond,meThird];
      Writeln('Set property    : ');
      Writeln('Value                        : ',SetAsString(O.SetField));
      Writeln('Ord(Value)                   : ',Byte(O.SetField));
      Writeln('Get (name)                   : ',GetSetProp(O,'SetField'));
      PI:=GetPropInfo(O,'SetField');
      Writeln('Get (propinfo)               : ',GetSetProp(O,PI,false));
      S:=[meFirst,meThird];
      SetOrdProp(O,'SetField',Byte(S));
      Write('Set (name,[mefirst,methird]) : ');
      Writeln(SetAsString(O.SetField));
      S:=[meSecond];
      SetOrdProp(O,PI,Byte(S));
      Write('Set (propinfo,[meSecond])    : ');
      Writeln(SetAsString(O.SetField));
      O.Free;
    end.

Documentation generated on: May 14 2021