Saving data in localDB

Question

Hi!

I am facing a problem saving data in a local sql server 2008 database, in fact when I save everything is fine but as soon as I consult the database data there is nothing in it, someone could one help me please, here are my codes 

 

Ma connexion string

class connexion
    {
        public static string getconnexion()
        {
            return "Data Source=(LocalDB)\\MSSQLLocalDB;AttachDbFilename=|DataDirectory|\\Database.mdf;Integrated Security=True";
        }
    }

 Class To Add Client:

{
           SqlConnection con = new SqlConnection(connexion.getconnexion());
           con.Open();
           SqlCommand cmd1 = new SqlCommand("Insert into client(num_passport,nom,adresse,phone) values(@num_passport,@nom,@adresse,@phone)", con);
           // cmd1.CommandType = System.Data.CommandType.StoredProcedure;

           cmd1.Parameters.AddWithValue("@num_passport", num_passport);
           cmd1.Parameters.AddWithValue("@nom", nom);
           cmd1.Parameters.AddWithValue("@adresse", adresse);
           cmd1.Parameters.AddWithValue("@phone", phone);
           cmd1.ExecuteNonQuery();

Button Add event:

private void button1_Click(object sender, EventArgs e)
        {
            SaisieClient st = new SaisieClient();
            st.Num_passport = idclt.Text;
            st.Nom = clt.Text;
            st.Adresse = adres.Text;
            st.Phone = Int32.Parse(phone.Text).ToString();
           st.Saisie();