Control baza de date

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Data.Sql;
using System.Data.SqlClient;

namespace Arsobyc_DataBase_Control
{
    public partial class Form1 : Form
    {
        SqlCommand cmd;
        SqlConnection con;
        private SqlDataAdapter da;

        public Form1()
        {
            InitializeComponent();
        }

        private void label2_Click(object sender, EventArgs e)
        {

        }

        private void label4_Click(object sender, EventArgs e)
        {

        }

        private void label3_Click(object sender, EventArgs e)
        {

        }

        private void Form1_Load(object sender, EventArgs e)
        {
            // TODO: This line of code loads data into the 'u181542750_arsobDataSet.Archers' table. You can move, or remove it, as needed.
            this.archersTableAdapter.Fill(this.u181542750_arsobDataSet.Archers);

        }

        private void dataGridView1_CellContentClick(object sender, DataGridViewCellEventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            SqlConnection con = new SqlConnection("Data Source=sql34.main-hosting.eu;Initial Catalog=u181542750_arsob;Integrated Security=True");
            con.Open();
            cmd = new SqlCommand("INSERT INFO Archers (Nume,Prenume,Varsta,Sex,Categorie,E-mail,Telefon,CNP) VALUES (@Nume,@Prenume,@Varsta,@Sex,@Categorie,@E-mail,@Telefon,@CNP)", con);
            cmd.Parameters.AddWithValue("@Nume", textBox1.Text);
            cmd.Parameters.AddWithValue("@Prenume", textBox2.Text);
            cmd.Parameters.AddWithValue("@Varsta", textBox3.Text);
            cmd.Parameters.AddWithValue("@Sex", comboBox1.SelectedItem.ToString());
            cmd.Parameters.AddWithValue("@Categorie", comboBox2.SelectedItem.ToString());
            cmd.Parameters.AddWithValue("@E-mail", textBox4.Text);
            cmd.Parameters.AddWithValue("@Telefon", textBox5.Text);
            cmd.Parameters.AddWithValue("@CNP", textBox6.Text);
            cmd.ExecuteNonQuery();
        }

        private void button3_Click(object sender, EventArgs e)
        {

        }

        private void button2_Click(object sender, EventArgs e)
        {

        }

        private void archersBindingSource_CurrentChanged(object sender, EventArgs e)
        {

        }
    }
}