读取sqlServer数据库

private void qButton1_Click(object sender, EventArgs e)
        {
            String strConn = "server= .\\SQLEXPRESS;uid=sa;pwd=sasa;database=jxcbook";

            SqlConnection conn = new SqlConnection(strConn);
            String sqlId = "select * from [业务员清单] ";
            conn.Open();
            SqlCommand cmd = new SqlCommand(sqlId, conn);
            SqlDataAdapter da = new SqlDataAdapter(cmd);

            DataSet ds = new DataSet();
            da.Fill(ds, "业务员清单");

            dataGridView1.DataSource = ds;
            dataGridView1.DataMember = "业务员清单";

            conn.Close();
        }