private void btn_Pridaj_Zamestnanca_Click(object sender, EventArgs e)
        {
            SqlConnection MyConn = new SqlConnection(pripojenie);

            MyConn.Open();
            string insert = "insert into Zamestnanec(ID_Zamestnanec,Meno,Priezvisko,Datum_Narodenia,Narodnost,Ulica,Mesto,Pozicia,Telefon,Email,Uzivatel_Username) values (next value for sekZamestnanec,'" + tb_Meno_Zamestnanca.Text + "','" + tb_Priezvisko_Zamestnanca.Text + "','" + dtp_Datum_Narodenia_Z.Text + "','" + tb_Narodnost_Zamestnanca.Text + "','" + tb_Ulica_Zamestnanca.Text + "','" + tb_Mesto_Zamestnanca.Text + "','" + cb_Pozicia_Zamestnanca.Text + "','" + tb_Telefon_Zamestnanca.Text + "','" + tb_Email_Zamestnanca.Text + "','" + cb_Zamestnanec_Uzivatel.Text + "') ";

            sql = new SqlCommand(insert, MyConn);
            sql.ExecuteNonQuery();
            ds_Zamestnanec.Tables["Zamestnanec"].Clear();
            MyAdapter5.Fill(ds_Zamestnanec, "Zamestnanec");
            dgw_Zamestnanec.DataSource = ds_Zamestnanec.Tables["Zamestnanec"];
        }
        private void btn_Zmaz_Zamestnanca_Click(object sender, EventArgs e)
        {
            SqlConnection MyConn = new SqlConnection(pripojenie);

            MyConn.Open();
            string delete = "delete from Zamestnanec where ID_Zamestnanec='" + cb_ID_Zamestnanec.Text + "'; " +
                            "delete from Kurier where Zamestnanec_ID_Zamestnanec='" + cb_ID_Zamestnanec.Text + "';";

            sql = new SqlCommand(delete, MyConn);
            sql.ExecuteNonQuery();
            ds_Zamestnanec.Tables["Zamestnanec"].Clear();
            MyAdapter5.Fill(ds_Zamestnanec, "Zamestnanec");
            dgw_Zamestnanec.DataSource = ds_Zamestnanec.Tables["Zamestnanec"];
        }
        private void btn_Edituj_Zamestnanca_Click(object sender, EventArgs e)
        {
            SqlConnection MyConn = new SqlConnection(pripojenie);

            MyConn.Open();
            string update = "UPDATE Zamestnanec SET Meno = '" + tb_Meno_Zamestnanca.Text + "', " +
                            "Priezvisko = '" + tb_Priezvisko_Zamestnanca.Text + "', " +
                            "Datum_Narodenia = '" + dtp_Datum_Narodenia_Z.Text + "', " +
                            "Narodnost = '" + tb_Narodnost_Zamestnanca.Text + "', " +
                            "Ulica = '" + tb_Ulica_Zamestnanca.Text + "', " +
                            "Mesto = '" + tb_Mesto_Zamestnanca.Text + "', " +
                            "Pozicia = '" + cb_Pozicia_Zamestnanca.Text + "', " +
                            "Telefon = '" + tb_Telefon_Zamestnanca.Text + "', " +
                            "Email = '" + tb_Email_Zamestnanca.Text + "', " +
                            "Uzivatel_Username = '******' WHERE ID_Zamestnanec =  '" + cb_ID_Zamestnanec.Text + "'";

            sql = new SqlCommand(update, MyConn);
            sql.ExecuteNonQuery();
            ds_Zamestnanec.Tables["Zamestnanec"].Clear();
            MyAdapter5.Fill(ds_Zamestnanec, "Zamestnanec");
            dgw_Zamestnanec.DataSource = ds_Zamestnanec.Tables["Zamestnanec"];
        }