how to separate the array list values and based on that i need retrieve the data from database

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ASP.NET

i just want to calculate the ratings based in the product and display five recommended product based on the rating i done all the things by using below code ...but i have one problem while i executing the code lost product details only displayed in that top five model so i need to separate the string and assign that into different string or array based on that i need to retrieve the data about that top five product details fro database
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Code for rating calculation:
----------------------------

try
{
     con1.Open();
     SqlCommand cmd1 = new SqlCommand("select top 5 model, sum(rating)/count(name) as ratetotal,count(name) as nocustomer from ratings where ptype='laptop' GROUP BY  model order by ratetotal desc", con1);

     SqlDataReader rdr = cmd1.ExecuteReader();
 
     while (rdr.Read())
     {
         lap.Add(rdr[0].ToString());
         //lapt.Add(rdr[0].ToString());
         //lapt.Add(rdr[1].ToString());
         //lapt.Add(rdr[2].ToString());
        //lap.Add(lapt.ToString());
     }           
}

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code for retrieve the data from database:

ArrayList dat = ratingdata.rating.laprating();
string model;
       
foreach (object x in dat)
{
     model = x.ToString();
     string[] modelna = model.Split(',');
     string first = modelna[0].ToString();
 
     try
     {
          con.Open();
          SqlCommand cmds = new SqlCommand("select Pictureurl,pbrandname,model,price from productdetails where model=@model", con);
          cmds.Parameters.AddWithValue("@model",model.ToString());
          SqlDataAdapter das = new SqlDataAdapter(cmds);
          DataSet dsa = new DataSet();
          das.Fill(dsa, "productdetails");
          DataList2.DataSource = dsa.Tables[0];
          DataList2.DataBind();
}

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