private void btnSave_Click(object sender, EventArgs e)
        {
            if (dtpExpire.Value <= DateTime.Now || tboxAnnouncementText.Text == String.Empty || tboxTitle.Text == String.Empty)
            {
                MessageBox.Show("Datum i vrijeme isteka objave vijesti mora biti veće od današnjeg.\nNaslov i tekst objave ne mogu biti prazni.");
            }
            else
            {
                using (DBBL data = new DBBL())
                {
                    Image img  = null;
                    Image icon = null;
                    try
                    {
                        if (tboxImagePath.Text != "Izaberite sliku")
                        {
                            img = Image.FromFile(tboxImagePath.Text);
                        }
                        if (tboxIconPath.Text != "Izaberite ikonu")
                        {
                            icon = Image.FromFile(tboxIconPath.Text);
                        }
                    }
                    catch (Exception)
                    {
                    }

                    data.updateAnnouncement(frmAnnouncements.announcement, tboxTitle.Text, tboxAnnouncementText.Text, dtpExpire.Value, img, icon);
                    MessageBox.Show("Uspješno ste editovali podatke o objavi.");
                }
            }
        }