not show data in datagridview

pls try it...


private void button1_Click(object sender, EventArgs e)      
       {
           
            con.Open();
           SqlDataAdapter sd = new SqlDataAdapter("select * from customers where ......", con);
           DataSet ds = new DataSet();
           sd.Fill(ds, "customers");
           dataGridView1.DataSource = ds.Tables[0];
           
              con.Close();
       }