How to avoid time part from datetime datafield in access database using c#

hai all
i have ms access table named table1

id       item   stock  price  code    stock_date                 model

1	ball	125	100	1	01/08/2011 12:00:00 AM	adidas
2	bat	150	1500	2	02/08/2011 12:00:00 AM	sii
3	stump	300	100	3	03/08/2011 12:00:00 AM	sii
4	pad	50	500	10	18/08/2011 12:00:00 AM	adidas
NULL	NULL	NULL	NULL	NULL	NULL	NULL

I want to find 02/08/2011 stock_date product details
I used below code
DateTimePicker1.value= 02/08/2011

oledcommand cmd = new oledd command("select * from table1 where stock_date="+ DateTimePicker1.value.ToShortString() +"",con);

In table1 stock_date have time part. So I cannot find the data. What changes I make in the code. please help me