RDLC drilldown report in asp.net without using application block

Step 1: Create a typed Dataset and add DataAdapters for Main and Sub rdlcs by pulling table or thru Stored procedure.
Step 2: Design two RDLCs Main.rdlc and Sub.rdlc
Step 3: Create Paramater in Sub.rdlc
Step 4: in Main.rdlc, right click on the column-'Text Box Properties'. Go to Action - Choose 'Go to Report'. Choose Sub.rdlc under 'Specify a report' then add the Parameter, give the one you created in Sub.rdlc and select the database column value to pass.
Step 5. Create a webform, drag the report viewer and go to its Drilldown event in code behind and write the code as below

protected void ReportViewer1_Drillthrough(object sender, DrillthroughEventArgs e)
        {
            
            LocalReport report = (LocalReport)e.Report;
                int MakeId = 0;
                IList<ReportParameter> list = report.OriginalParametersToDrillthrough;
                foreach (ReportParameter param in list)
                {
                    //Since i know the parameter is only one and its not a multivalue 
                    //I can directly fetch the first value from the Values array.
                    MakeId = Convert.ToInt32(param.Values[0]);
                }
                DataSets ds = new DataSets();
                ds.EnforceConstraints = false;
                SqlConnection con = new SqlConnection(ConfigurationManager.ConnectionStrings["Cons"].ConnectionString);
                con.Open();

                SqlCommand cmd = new SqlCommand("ModelSivaa");
                cmd.CommandType = CommandType.StoredProcedure;
                cmd.Connection = con;
                cmd.Parameters.AddWithValue("@MakeId", MakeId);
                cmd.ExecuteNonQuery();
                SqlDataAdapter adap = new SqlDataAdapter(cmd);
                adap.Fill(ds, "Modeltable");
                report.DataSources.Add(new ReportDataSource("ModelSet", ds.Tables["Modeltable"]));