bind dropdownlist in asp.net using dataset

 protected void BindCustomerNameddl()
        {
            con.Open();
            SqlCommand cmd = new SqlCommand("Select cid,name FROM memberLogin", con);
            SqlDataAdapter da = new SqlDataAdapter(cmd);
            DataSet ds = new DataSet();
            da.Fill(ds);
            ddlCustomername.DataSource = ds;
            ddlCustomername.DataTextField = "name";
            ddlCustomername.DataValueField = "cid";
            ddlCustomername.DataBind();
            ddlCustomername.Items.Insert(0, new ListItem("--Select--", "0"));
            con.Close();
        }