//Create a new bidder object and subscribe to its events
private void CreateNewBidder()
{
string bidderName = ReadBidderName();
//Create the new bidder
if (!string.IsNullOrEmpty(bidderName))
{
BidderIsPublisher frm = new BidderIsPublisher(txtName.Text, m_newBidObject.Name);
frm.Show();
//Subscribe to the publisher's new bid and quit bid events
frm.NewBid += OnNewBidSent;
frm.QuitBid += OnBidderDrawBack;
}
}
/// <summary>
/// Here is the power of delegates - who is the bidder - don't know,
/// the sender tells us at run time
/// Eventhandler for the sender's (bidder's) SendQuitBid event - what to do when the event is
/// fired by the publisher object (a bidder class, see above)
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
///
private void OnBidderDrawBack(object sender, BidEventInfo e)
{
lstBidHistory.Items.Add(string.Format("{0} draws back at {1}. Please come back!",
e.Bidder, DateTime.Now.ToShortTimeString()));
if (sender != null)
{
BidderIsPublisher frm = (BidderIsPublisher)sender;
//Unubscribe to the publisher's new bid and quit bid events
//Compare with above (subscription)
frm.NewBid -= OnNewBidSent;
frm.QuitBid -= OnBidderDrawBack;
frm.Title = "You are out! " + DateTime.Now.ToShortTimeString();
}
}
