x.Tables.Clear(); SqlConnection con = new SqlConnection("Data Source=BENDDANE-PC\\SQLEXPRESS;Initial Catalog=C:\......."); SqlDataAdapter adap = new SqlDataAdapter(); adap.SelectCommand = new SqlCommand("select *from Date where date_vérification_étalonnage='" +("dd/mm/2010") + "'", Program.con); adap.Fill(x); dataGridView1.DataSource = x.Tables[0];