/// <summary>
/// Updates stock prices for the subscribed instruments in the internal list.
/// </summary>
/// <param name="updatedInstruments"></param>
private void UpdateStockPrices(IList <InstrumentItem> updatedInstruments)
{
//Update the price or add any new items.
foreach (var updatedInstrument in updatedInstruments)
{
var stockItemToModify = CurrentInstrumentItems.Where(item => item.Symbol == updatedInstrument.Symbol).FirstOrDefault();
if (stockItemToModify != null)
{
stockItemToModify.Price = updatedInstrument.Price;
}
else
{
CurrentInstrumentItems.Add(new InstrumentItem(updatedInstrument.Symbol.ToUpper(), updatedInstrument.Price));
}
}
//Remove any items that may not be present.
foreach (var currentStockItem in CurrentInstrumentItems.ToList())
{
var stockItemToRemove = updatedInstruments.FirstOrDefault(item => item.Symbol == currentStockItem.Symbol);
if (stockItemToRemove == null)
{
CurrentInstrumentItems.Remove(currentStockItem);
}
}
}
private void AddItem()
{
if (!CurrentInstrumentItems.Any(item => item.Symbol == ItemToAdd.ToUpper()))
{
ErrorText = "";
try
{
myPricingEngine.StartMonitoring(new List <string>()
{
ItemToAdd.ToUpper()
});
}
catch (InvalidDataException ex)
{
ErrorText = ex.Message;
}
}
else
{
ErrorText = string.Format(" {0} already in the list!", ItemToAdd);
}
}
