[marcoszorrilla]

Bueno mira este ejemplo que acabo de preparar.

Código Delphi [-]
  public

Tds:TDataSource;
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

procedure TForm1.Button1Click(Sender: TObject);

begin
Tds:=DbEdit1.DataSource;
Dbedit1.DataSource:=Nil;
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
DbEdit1.DataSource:=TDs;
end;

Un saludo.