Trading Platform in CSharp c# 3 - streaming data

In this video:

• you will add some textboxes, comboboxes, labels, numberupdown, to your form
• request and receive live streaming data bid, ask, and last prices
  The videos are best viewed at the highest quality and full screen.

This KeyDown event requests the market data from the server.
click on the link below.

 private void cbSymbol_KeyDown(object sender, KeyEventArgs e)  
     { 
       if (e.KeyCode == Keys.Enter)  
       { 
         e.SuppressKeyPress = true;  
         // still works with fake account number  
         string myAccount = "U132458";  
         axTws1.cancelMktData(2);  
         axTws1.reqAccountUpdates(0, myAccount); 
         // Create a TagValueList object (for API version 9.71 users) 
         TWSLib.ITagValueList mktDataOptions = axTws1.createTagValueList();
         // Create a new contract object  
         TWSLib.IContract ContractInfo = axTws1.createContract();  
         // Connection identifier  
         ContractInfo.conId = 0;  
         // Stock symbol  
         ContractInfo.symbol = cbSymbol.Text;  
         // Type Stock=STK,Option=OPT,Future=FUT, etc.  
         ContractInfo.secType = "STK";  
         // The Options or Futures expiration data in the format YYYYMMDD  
         ContractInfo.expiry = "";  
         // The Options Strike Price   
         ContractInfo.strike = 0;  
         // used for Options PUT or CALL  
         ContractInfo.right = "";  
         // The contract multiplier for Futures or Options not used for Stocks  
         ContractInfo.multiplier = "";  
         // The destination of order or request. "SMART" = IB order router  
         ContractInfo.exchange = "SMART";  
         // The primary exchange where the instrument trades.   
         // NYSE, NASDAQ, AMEX, BATS, ARCA, PHLX etc.  
         ContractInfo.primaryExchange = "NASDAQ";  
         // The currency of the exchange USD or GBP or CAD, etc.  
         ContractInfo.currency = "USD";  
         // Request the streaming market data for symbol in cbSymbol  
         //  TickerID, ContractInfo, genericTicks and Snapshot (0 for streaming)  
         axTws1.reqMktDataEx(2, ContractInfo, "165, 233", 0);  
         // if you are using API version 9.71 you need a fifth parameter
         // axTws1.reqMktDataEx(2, ContractInfo, "165, 233", 0, mktDataOptions); 
         //timer1.Start();  
         cbSymbol.SelectAll();  
         axTws1.reqAccountUpdates(1, myAccount); // requests account updates  
         //AddSymbol();  
                } 
     }  

This event gets the bid ask and last price from the server

 private void axTws1_tickPrice(object sender, AxTWSLib._DTwsEvents_tickPriceEvent e)  
     {
       if ((e.tickType) == 2)  // 2 = Ask  
       {  
         // Gets the Ask price and formats it to 2 decimals  
         // sends the result to the Ask textbox  
         double theAsk = e.price;  
         int decimalPlaces = 2;  
         theAsk = theAsk * Math.Pow(100, decimalPlaces);  
         theAsk = Math.Truncate(theAsk);  
         theAsk = theAsk / Math.Pow(100, decimalPlaces);  
         string askPrice = string.Format("{0:N" + Math.Abs(decimalPlaces) + "}", theAsk);  
         tbAsk.Text = askPrice;  
       }  
       else if ((e.tickType) == 1)  // 1 = Bid  
       {  
         // Gets the Bid price and formats it to 2 decimals  
         // sends the result to the Bid textbox  
         double theBid = e.price;  
         int decimalPlaces = 2;  
         theBid = theBid * Math.Pow(100, decimalPlaces);  
         theBid = Math.Truncate(theBid);  
         theBid = theBid / Math.Pow(100, decimalPlaces);  
         string bidPrice = string.Format("{0:N" + Math.Abs(decimalPlaces) + "}", theBid);  
         tbBid.Text = bidPrice;   
       }  
       if ((e.tickType) == 4)  // 4 = Last  
       {  
         // Gets the Last price and formats it to 2 decimals  
         // sends the result to the Last text box
         double theLast = e.price;  
         int decimalPlaces = 2;  
         theLast = theLast * Math.Pow(100, decimalPlaces);  
         theLast = Math.Truncate(theLast);  
         theLast = theLast / Math.Pow(100, decimalPlaces);  
         string lastPrice = string.Format("{0:N" + Math.Abs(decimalPlaces) + "}", theLast);  
         tbLast.Text = lastPrice;  
       }  
     }  

This event changes the character from lowercase to uppercase

 private void cbSymbol_KeyPress(object sender, KeyPressEventArgs e)  
     {
      // changes lowercase to uppercase 
      if (char.IsLower(e.KeyChar))  
       {  
         e.KeyChar = char.ToUpper(e.KeyChar);  
       } 
     }  

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