If you need to change the DataSource property of many data-aware controls that do not have a common ancestor you can use Delphi's RTTI (run-time type info) and call only one procedure. Here's how:
~~~~~~~~~~~~~~~~~~~~~~~~~
uses TypInfo;
...
procedure ApplyDataSource(dbCtrls: array of TControl; DS: TDataSource) ;
var
cnt: Integer;
PropInfo: PPropInfo;
begin
for cnt := Low(dbCtrls) to High(dbCtrls) do
begin
PropInfo := GetPropInfo(dbCtrls[cnt].ClassInfo, 'DataSource') ;
if Assigned(PropInfo) then
SetOrdProp(dbCtrls[cnt], PropInfo, LongInt(DS)) ;
end;
end;
...
Usage:
ApplyDataSource([DBNavigator1, DBText1, DBButton1], DataSource1) ;
~~~~~~~~~~~~~~~~~~~~~~~~~
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