//submit button on the combobox click event
private void button1_Click(object sender, EventArgs e)
{
try
{
int volume = Convert.ToInt32(textBox1.Text);
double price = Convert.ToDouble(textBox2.Text);
//make sure volume and price are 0 or greater
if (volume <= 0 || price <= 0)
{
throw new Exception();
}
//create new sellOrder, then add sell order to the respective companies sell orderlist
//using the combobox selected index
Class_SellOrder order = new Class_SellOrder(price, volume);
realTimeData.CompanyList[comboBox1.SelectedIndex].addSellOrder(order);
//notify observes
realTimeData.Notify();
//clear textbox's for the next user sell input
textBox1.Clear();
textBox2.Clear();
}
catch
{
//Show an invalid error message if user entered inputs are invalid
MessageBox.Show("You have entered an invalid value ", "Invalid Input");
}
}
/* SELL ORDER LIST RELATED METHODS */
//add a new sell order to the sell order list
public void addSellOrder(Class_SellOrder order)
{
sellOrdersList.Add(order); //add sell order
sellOrdersList = sellOrdersList.OrderBy(x => x.getPrice()).ToList();
sellTransactionCheck(order);
}
//check if we can complete any open buy orders when creating a new sell order
public void sellTransactionCheck(Class_SellOrder order)
{
foreach (Class_Order o in buyOrdersList)
{
//if there is a price in buy orders greater than or equal to the selling price then a transcation can occur
if (o.getPrice() >= order.getPrice())
{
//if the buy order has more shares than the sell order
if (o.getOrderSize() > order.getOrderSize())
{
//add order shares to the current share volume, set new buy order size by minusing the seller size, and update company variables for the stock state summary
this.volume += order.getOrderSize();
o.setOrderSize(o.getOrderSize() - order.getOrderSize());
UpdateCompanyHelper(order);
//add sell order to the transaction list no more shares left on sell order so break
transactionsList.Add(order);
break;
}
//if the sell order has more shares than the buy order
else if (o.getOrderSize() < order.getOrderSize())
{
//add order shares to the current share volume, set new sell order size by minus the buy order size, and update company variables for the stock state summary
this.volume += o.getOrderSize();
order.setOrderSize(order.getOrderSize() - o.getOrderSize());
UpdateCompanyHelper(o);
//add buy order to the transaction list and keeping searching still shares to buy
transactionsList.Add(o);
}
//if the buy order and sell order have matching share sizes
else
{
//add order shares to the current share volume, and update company variables for the stock state summary
this.volume += order.getOrderSize();
UpdateCompanyHelper(order);
//add both buy order and sell order to the transaction list no more shares left on sell order so break
transactionsList.Add(o);
transactionsList.Add(order);
break;
}
}
}
//removing the current pending orders since they have now got a match
foreach (Class_Order temp in transactionsList)
{
Class_SellOrder dummy = new Class_SellOrder();
if (temp.GetType().Equals(dummy.GetType()))
{
sellOrdersList.Remove((Class_SellOrder)temp);
}
else
{
buyOrdersList.Remove((Class_BuyOrder)temp);
}
}
}
