Subscribing to initialization events

About initialization events

A TradeSubscription object is essentially a collection of pointers to a set of orders and a collection of pointers to a set of fills. Before calling the Start() method for a TradeSubscription object, these collections are empty. After calling the Start method, the TT .NET SDK begins to populate these collections.

Supported initialization events

A TradeSubscription object fires the following event when its initial set of orders and fills are added.

Event	Description
OrderBookDownload	Fired when the order book download is complete and the orders have been added to the TradeSubscription instance

After this event has fired, the application can begin to perform actions on the orders associated with a TradeSubscription instance.

Subscribing for initialization events

You can subscribe for initialization events as follows before calling the Start() method.

// Create a TradeSubscription to listen for initialization events
m_ts = new TradeSubscription(tt_net_sdk.Dispatcher.Current);
m_ts.OrderBookDownload += new EventHandler<OrderBookDownloadEventArgs>(m_ts_OrderBookDownload);
m_ts.Start();

Defining event handlers

The following code snippet shows the structure for these event handlers.

void m_ts_OrderBookDownload(object sender, OrderBookDownloadEventArgs e)
{
}