Pass parameter to subreport from main crystal report programatically

public partial class RFSW0001 : System.Web.UI.Page
{
    public string query, constr;
    public SqlConnection con;

    SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["FoodRepConnectionString"].ConnectionString);
    ReportDocument rpdoc = new ReportDocument();

    ReportDocument sub_rpdoc = new ReportDocument();

    public void connection()
    {
        constr = ConfigurationManager.ConnectionStrings["FoodRepConnectionString"].ToString();
        con = new SqlConnection(constr);
        con.Open();
    }
    protected void Page_Load(object sender, EventArgs e)
    {
        //--------------Start Bind Supervisor
        if (!IsPostBack)
        {
            ddlSupervisor.AppendDataBoundItems = true;
            connection();
            String strSupQuery = "SELECT DISTINCT Parent_Code FROM Users WHERE Parent_Code !='' ORDER BY Parent_Code ASC";
            SqlConnection con = new SqlConnection(constr);
            SqlCommand cmd = new SqlCommand();
            cmd.CommandType = CommandType.Text;
            cmd.CommandText = strSupQuery;
            cmd.Connection = con;

            try
            {
                con.Open();
                ddlSupervisor.DataSource = cmd.ExecuteReader();
                ddlSupervisor.DataTextField = "Parent_Code";
                ddlSupervisor.DataValueField = "Parent_Code";
                ddlSupervisor.DataBind();
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                con.Close();
                con.Dispose();
            }
        }
        //--------------End Bind Supervisor
        //--------------Start Bind Route
        if (!IsPostBack)
        {
            ddlRoute.AppendDataBoundItems = true;
            connection();
            String strSupQuery = "SELECT DISTINCT User_Code ,(User_Code + ' - ' + User_Description) as UsersCode FROM Users WHERE User_Type = '0' and Is_Blocked = '0' ORDER BY User_Code ASC";
            SqlConnection con = new SqlConnection(constr);
            SqlCommand cmd = new SqlCommand();
            cmd.CommandType = CommandType.Text;
            cmd.CommandText = strSupQuery;
            cmd.Connection = con;

            try
            {
                con.Open();
                ddlRoute.DataSource = cmd.ExecuteReader();
                ddlRoute.DataTextField = "UsersCode";
                ddlRoute.DataValueField = "User_Code";
                ddlRoute.DataBind();
            }
            catch (Exception ex)
            {
                throw ex;
            }
            finally
            {
                con.Close();
                con.Dispose();
            }
        }
    }
        //--------------End Bind Route

        protected void btnRFSW0001Pdf_Click(object sender, EventArgs e)
        {

            conn.Open();

            RFSW0001Search();

            rpdoc.ExportToHttpResponse(ExportFormatType.PortableDocFormat, Response, true, "RFSW0001");

            conn.Close();

        }
        int dayOfWeek;
        public void RFSW0001Search()
        {
            System.Data.SqlClient.SqlCommand cmd1 = new System.Data.SqlClient.SqlCommand();
            cmd.CommandTimeout = 120;
            cmd.Connection = conn;
            cmd.CommandType = CommandType.StoredProcedure;
            cmd.CommandText = "sp_RFSW0001";
			/*
            System.Data.SqlClient.SqlCommand cmd2 = new System.Data.SqlClient.SqlCommand();
            cmd2.CommandTimeout = 120;
            cmd2.Connection = conn;
            cmd2.CommandType = CommandType.StoredProcedure;
            cmd2.CommandText = "sp_RFSW0001_CTBV";
			*/

            if (ddlSupervisor.SelectedValue == "-1")
            {
                cmd.Parameters.AddWithValue("@strSupervisor", DBNull.Value);
                
				//These are the SubReport Parameters
				//cmd2.Parameters.AddWithValue("@strSupervisor", DBNull.Value);
            }
            else
            {
                cmd.Parameters.AddWithValue("@strSupervisor", Convert.ToString(ddlSupervisor.SelectedValue));
                
				//These are the SubReport Parameters
				//cmd2.Parameters.AddWithValue("@strSupervisor", Convert.ToString(ddlSupervisor.SelectedValue));
            }
            if (ddlRoute.SelectedValue == "-1")
            {
                cmd.Parameters.AddWithValue("@strgRoute", DBNull.Value);
                
				//These are the SubReport Parameters
				//cmd2.Parameters.AddWithValue("@strgRoute", DBNull.Value);
            }
            else
            {
                cmd.Parameters.AddWithValue("@strgRoute", Convert.ToString(ddlRoute.SelectedValue));
                
				//These are the SubReport Parameters
				//cmd2.Parameters.AddWithValue("@strgRoute", Convert.ToString(ddlRoute.SelectedValue));
            }

            DateTime tempDate = System.Convert.ToDateTime(txtDate.Value.ToString());
            DateTime startOfMonth = new DateTime(tempDate.Year, tempDate.Month, 1);
            DateTime endOfMonth = new DateTime(tempDate.Year, tempDate.Month, DateTime.DaysInMonth(tempDate.Year, tempDate.Month));

            cmd.Parameters.AddWithValue("@dtpFirstDate", startOfMonth);
            cmd.Parameters.AddWithValue("@dtpLastDate", endOfMonth);

            cmd.Parameters.AddWithValue("@dtpFrom", txtDate.Value.ToString());
            cmd.Parameters.AddWithValue("@dtpTo", txtDate.Value.ToString());
			
			/* These are the SubReport Parameters
            DateTime dateInput = Convert.ToDateTime(txtDate.Value);
            DayOfWeek today = dateInput.DayOfWeek;

            string weekDay = Convert.ToString(today);

            if (weekDay == "Saturday")
            {
                dayOfWeek = 1;
            }
            else if (weekDay == "Sunday")
            {
                dayOfWeek = 2;
            }
            else if (weekDay == "Monday")
            {
                dayOfWeek = 3;
            }
            else if (weekDay == "Tuesday")
            {
                dayOfWeek = 4;
            }
            else if (weekDay == "Wednesday")
            {
                dayOfWeek = 5;
            }
            else if (weekDay == "Thursday")
            {
                dayOfWeek = 6;
            }
            else
            {
                dayOfWeek = 7;
            }

            //datecount.Text = Convert.ToString(dayOfWeek);

            cmd2.Parameters.AddWithValue("@dayNumber", Convert.ToString(dayOfWeek));
            */

            System.Data.SqlClient.SqlDataAdapter da = new System.Data.SqlClient.SqlDataAdapter(cmd);

            DataTable dt = new DataTable("sp_RFSW0001");
            try
            {
                da.Fill(dt);
            }
            catch (Exception)
            {
                //Page.Response.Redirect("NetworkError.aspx");
            }

            rpdoc.Load(Server.MapPath("reports/RFSW0001.rpt"));
            
            rpdoc.SetDatabaseLogon("sa", "ABC4RAK");
			
            rpdoc.SetDataSource(dt);
        }