private void ExecuteAddTarget(object parameter)
{
Target newTarget = new Target(shooter_id, stage_id, Byte.Parse(alpha),
Byte.Parse(charlie), Byte.Parse(delta),
Byte.Parse(miss), Byte.Parse(noShoot),
Byte.Parse(procedure), Byte.Parse(extra));
targetModel.AddTarget(newTarget);
ClearInput();
Targets = targetModel.GetTargets(Shooter_id, Stage_id).Convert();
}