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procedure TForm4.BitBtn2Click(Sender: TObject);
begin
if (Trim(ComboBox2.Text) <>'')and(Trim(Edit3.Text) <>'')then
  begin
    with ADOQuery1 do
    begin
      Close;
      SQL.Clear;
      SQL.Add('select * from ×÷Òµµ¥×ÊÁÏ where');
      SQL.Add(Trim(ComboBox2.Text));
      SQL.Add('= :a');
      Parameters.ParamByName('a').Value := Trim(Edit3.Text);
      Open;
    end;
    if ADOQuery1.RecordCount >0 then
    begin
DataSource1.DataSet := ADOQuery1;
    end
    else
    begin
      DataSource1.DataSet := Nil;
      Application.MessageBox('ÐÅÏ¢²»È«»ò²»´æÔÚ¡£','Ìáʾ',64);
    end;
  end;
end;


DataSource1.DataSet := ADOQuery1;(Õâ¾äÔËÐеÄʱºò´íÎó)
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