void UpdateWatchList(StockData[] watchListData)
        {
            int count  = 0;
            int isRise = 0;

            oldWatchListData = new ObservableCollection <CompanyTradingDataViewModel>(watchLisBindingData as IEnumerable <CompanyTradingDataViewModel>);
            oldWatchListData = new ObservableCollection <CompanyTradingDataViewModel>();
            foreach (CompanyTradingDataViewModel item in watchLisBindingData)
            {
                oldWatchListData.Add(new CompanyTradingDataViewModel(item.TradingData, item.CompanyName, item.Rise, item.TotalRise));
            }
            watchLisBindingData.BeginUpdate();
            foreach (StockData dt in watchListData)
            {
                if (companies.Count <= (dt.CompanyID))
                {
                    continue;
                }
                CompanyTradingData ctd = new CompanyTradingData(dt, companies[dt.CompanyID]);
                if (watchLisBindingData.Count < companies.Count)
                {
                    watchLisBindingData.Add(new CompanyTradingDataViewModel(ctd, ctd.CompanyName, isRise, 1));
                }
                else
                {
                    SetWatchListBindingData(count, ctd);
                    count++;
                }
            }
            watchLisBindingData.EndUpdate();
            if (watchListChanged != null)
            {
                watchListChanged(this, EventArgs.Empty);
            }
        }
 void SetTransactionGridBindingData(List <TransactionData> transactions)
 {
     transactionGridBindingData.Clear();
     transactionGridBindingData.BeginUpdate();
     foreach (TransactionData tdvm in transactions)
     {
         transactionGridBindingData.Add(tdvm);
     }
     transactionGridBindingData.EndUpdate();
     CurrentPriceIndex = model.CurrentPriceIndex;
     RaiseCurrentPriceIndexChanged();
 }