Unable to display command with parameters in datagridview

Hello,
following my discussions with phil.o, I cannot finalize my code.
Here is this example:

using (SQLiteCommand command = m_conn.CreateCommand())
{
   command.CommandType = CommandType.Text;
   command.CommandText =
      "SELECT * FROM Tble_Commande INNER JOIN Tble_Demande ON" + 
      " (Tble_Demande.dmd_ID = Tble_Commande.cmd_ID)" +
      " WHERE Tble_Commande.Annee = ?" +  
      " AND (Reference IS NULL OR Reference LIKE ?)" +
      " AND (Designations IS NULL OR Designations LIKE ?)" +
      " AND (Date_prise_compte_cmds IS NULL OR date(Date_prise_compte_cmds) = ?)" +
      " AND (Lieu_livraison IS NULL OR Lieu_livraison LIKE ?)" +
      " AND (Imputation IS NULL OR Imputation LIKE ?)" +
      " AND (Type_cmds IS NULL OR Type_cmds LIKE ?)";
   SQLiteParameter param;

   param = new SQLiteParameter();
   param.Value = Annee_en_Cour;
   command.Parameters.Add(param);

   param = new SQLiteParameter();
   param.Value = $"%{Txt_P4_recherche_Ref.Text}%";
   command.Parameters.Add(param);

   param = new SQLiteParameter();
   param.Value = $"%{Txt_P4_recherche_Article.Text}%";
   command.Parameters.Add(param);

   param = new SQLiteParameter();
   param.Value = Txt_P4_recherche_Date.Text;
   command.Parameters.Add(param);

   param = new SQLiteParameter();
   param.Value = $"%{Cbo_P4_recherche_lieu.Text}%";
   command.Parameters.Add(param);

   param = new SQLiteParameter();
   param.Value = $"%{Cbo_P4_recherche_Imput.Text}%";
   command.Parameters.Add(param);

   param = new SQLiteParameter();
   param.Value = $"%{Cbo_P4_recherche_TypeCmds.Text}%";
   command.Parameters.Add(param);

   // ...
} 

I block on parameters, here is the error message.
unknown error
Insufficient parameters supplied to the command

Unable to display in my datagridview ... 
thanks in advance for your support.

using (DataTable dt_P4_Tble_cmd = new DataTable())
{
    SQLiteCommand command = Program.Connex_Bdd.CreateCommand();
    command.CommandType = CommandType.Text;
    command.CommandText =
       "SELECT * FROM Tble_Commande INNER JOIN Tble_Demande ON" +
       " (Tble_Demande.dmd_ID = Tble_Commande.cmd_ID)" +
       " WHERE Tble_Commande.Annee = @Annee" +
       " AND (Reference IS NULL OR Reference LIKE @Ref)" +
       " AND (Designations IS NULL OR Designations LIKE @Article)" +
       " AND (Date_prise_compte_cmds IS NULL OR date(Date_prise_compte_cmds) = @DateCmds)" +
       " AND (Lieu_livraison IS NULL OR Lieu_livraison LIKE @Lieu)" +
       " AND (Imputation IS NULL OR Imputation LIKE @Imput)" +
       " AND (Type_cmds IS NULL OR Type_cmds LIKE @TypeCmds)";

    SQLiteParameter param = new SQLiteParameter();

    param.ParameterName = "@Annee";
    param.Value = $"%Cbo_Choix_Annee.Text%";

    param.ParameterName = "@Ref";
    param.Value = $"%Txt_P4_recherche_Ref.Text%";

    param.ParameterName = "@Article";
    param.Value = $"%Txt_P4_recherche_Article.Text%";

    param.ParameterName = "@DateCmds";
    param.Value = $"%Txt_P4_recherche_Date.Text%";

    param.ParameterName = "@Lieu";
    param.Value = $"%Cbo_P4_recherche_lieu.Text%";

    param.ParameterName = "@Imput";
    param.Value = $"%Cbo_P4_recherche_Imput.Text%";

    param.ParameterName = "@TypeCmds";
    param.Value = $"%Cbo_P4_recherche_TypeCmds.Text%";

    command.Parameters.Add(param);

    using (SQLiteDataAdapter adapter = new SQLiteDataAdapter(command.CommandText, Program.Connex_Bdd))
    {
        adapter.Fill(dt_P4_Tble_cmd);
    }
    Datagridview.DataSource = dt_P4_Tble_cmd;
}