private void btnSubmit_Click(object sender, EventArgs e) { if (Checker()) { if (txtClientID.Text != "") { ClientsModel client = new ClientsModel( Convert.ToInt32(txtClientID.Text), txtFirstName.Text, txtLastName.Text, txtBarcode.Text, txtPhoneNumber.Text, Convert.ToDecimal(txtDiscount.Text) ); SqliteDataAccess.EditClient(client); } else { ClientsModel client = new ClientsModel( txtFirstName.Text, txtLastName.Text, txtBarcode.Text, txtPhoneNumber.Text, Convert.ToDecimal(txtDiscount.Text), 0 ); SqliteDataAccess.CreateClient(client); } form.Refresh(); this.Close(); } }