Query sqlite with two parameters

string jourV="Samedi";
string rangV="Salle";
string requete="SELECT * FROM MyTable WHERE Jour = @J AND Rang = @R";
using (SqliteConnection con = new SqliteConnection("Data Source=MyDB.db"))
   {
   con.Open();
   using (SqliteCommand cmd = new SqliteCommand(requete, con))
      {
      cmd.Parameters.AddWithValue("@J", jourV);
      cmd.Parameters.AddWithValue("@R", rangV);
      using (SqliteDataReader reader = cmd.ExecuteReader())
         {
         while (reader.Read())
            {
            ...
            } 
         }
      }
   }