Empty Table Problem

I am creating three tables in a DataSet using three stored procedures and I need a way to know that either the tables have at least one row or preferably which if any has no rows.  How can I do that?

using three SP's, one for each table:SqlCommand cmd = new SqlCommand("CompanyCheck", con);
SqlCommand cmd2 = new SqlCommand("ContractorVerify", con);
SqlCommand cmd3 = new SqlCommand("StoreLocation", con);

  cmd.CommandType = CommandType.StoredProcedure;
  cmd2.CommandType = CommandType.StoredProcedure;
  cmd3.CommandType = CommandType.StoredProcedure;
  cmd.Parameters.AddWithValue("@CompanyID", CompanyID);
  cmd2.Parameters.AddWithValue("@CompanyID", CompanyID);
  cmd3.Parameters.AddWithValue("@CompanyID", CompanyID);
  SqlDataAdapter da = new SqlDataAdapter(); 

da.SelectCommand = cmd;
 DataSet ds = new DataSet();
        try
        {
            da.Fill(ds, "CompanyInfo");
            da.SelectCommand = cmd2;
            da.Fill(ds, "ContractorInfo");
            da.SelectCommand = cmd3;
            da.Fill(ds, "StoreInfo");
                   }
        catch
        { throw new ApplicationException("Data error"); }
        finally
        {
            con.Close();
        }

Thank you