private void btnDelete_Click(object sender, RoutedEventArgs e)
{
if (lstParticipants.SelectedIndex == -1)
return;
RegistrationHelper client = new RegistrationHelper();
try
{
client.DeleteParticipant(user, event_.EventID, (int)lstParticipants.SelectedValue);
loadParticipants();
MessageBox.Show("Operation succeeded!");
lstParticipants_SelectionChanged(null, null);
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
finally
{
client.Close();
}
}