ASPX & SQL returning multiple recordsets - identify them

I am creating a simple report in aspx.

I have a stored procedure that I'm calling to get 5 recorsets.

First 4 have 7 columns and second has 6 columns.

This is my C# code:

protected void bindGridView()
     {
         string _connStr = ConfigurationManager.ConnectionStrings["MyConnectionString"].ToString();
         DataSet dSet = new DataSet();
         try
         {
             using (SqlConnection conn = new SqlConnection(_connStr))
             {
                 using (SqlCommand cmd = new SqlCommand("MyProcedure", conn))
                 {
                     cmd.CommandTimeout = 120;
                     cmd.CommandType = CommandType.StoredProcedure;
                     cmd.Parameters.Add("@d", SqlDbType.VarChar).Value = dlDzial.SelectedValue;
                     cmd.Parameters.Add("@g", SqlDbType.Int).Value = dlGrupa.SelectedValue;
                     using (SqlDataAdapter ad = new SqlDataAdapter(cmd))
                     {
                         ad.Fill(dSet);
                         if (dSet.Tables[0].Rows.Count > 0)
                         {
                             GridView1.DataSource = dSet.Tables[0];
                             GridView1.DataBind();
                         }
                         else
                         {
                             ShowNoResultFound(dSet.Tables[0], GridView1);
                         }
                         if (dSet.Tables[1].Rows.Count > 0)
                         {
                             GridView2.DataSource = dSet.Tables[1];
                             GridView2.DataBind();
                         }
                         else
                         {
                             ShowNoResultFound(dSet.Tables[1], GridView2);
                         }
                         if (dSet.Tables[2].Rows.Count > 0)
                         {
                             GridView3.DataSource = dSet.Tables[2];
                             GridView3.DataBind();
                         }
                         else
                         {
                             ShowNoResultFound(dSet.Tables[2], GridView3);
                         }
                         if (dSet.Tables[3].Rows.Count > 0)
                         {
                             GridView4.DataSource = dSet.Tables[3];
                             GridView4.DataBind();
                         }
                         else
                         {
                             ShowNoResultFound(dSet.Tables[3], GridView4);
                         }
                         lbl1.Visible = lbl2.Visible = lbl3.Visible = lbl4.Visible = true;
                     }
                 }
             }
         }
         catch (Exception ex)
         {
             lblErrorMsg.Text = ex.Message;
         }
     }
 

But I have a problem. Depending on parameters sometimes recordset 2 & 3 are empty, thats why I get errors when trying to get some values from rows. recordset 4 is then Table[2] and is displayed in gridview 2 (it should be displayed in fourth gridview)

I would like to know how to identify recordsets that come from sql into C#.

I was searching a bit over the internet and I found that I can add extra column to every recordset and using this identify recordsets.

How to identify every recordset, so even if I change order of selects in sql I will be able to map then to correct GridView.

---