This is a c# sample wpf project to help get started with Dynamic Data. I have tried to make the code behind each screen as simple as posible so it is easy to follow.
Source code for dynamic data is at Dynamic Data on GitHub and the blog at http://dynamic-data.org/
The demo illustrates how the following code:
var loader = tradeService.All
.Connect(trade => trade.Status == TradeStatus.Live) //prefilter live trades only
.Filter(_filter) // apply user filter
.Transform(trade => new TradeProxy(trade),new ParallelisationOptions(ParallelType.Ordered,5))
.Sort(SortExpressionComparer<TradeProxy>.Descending(t => t.Timestamp),SortOptimisations.ComparesImmutableValuesOnly)
.ObserveOnDispatcher()
.Bind(_data) // update observable collection bindings
.DisposeMany() //since TradeProxy is disposable dispose when no longer required
.Subscribe();
produces this
or how the following extract
_cleanUp = tradeService.Live.Connect()
.Group(trade => trade.CurrencyPair)
.Transform(group => new CurrencyPairPosition(group))
.Sort(SortExpressionComparer<CurrencyPairPosition>.Ascending(t => t.CurrencyPair))
.ObserveOn(schedulerProvider.MainThread)
.Bind(_data)
.DisposeMany()
.Subscribe();
//when CurrencyPairPosition class does this
tradesByCurrencyPair.Cache.Connect()
.QueryWhenChanged(query =>
{
var buy = query.Items.Where(trade => trade.BuyOrSell == BuyOrSell.Buy).Sum(trade=>trade.Amount);
var sell = query.Items.Where(trade => trade.BuyOrSell == BuyOrSell.Sell).Sum(trade => trade.Amount);
var count = query.Count;
return new TradesPosition(buy,sell,count);
})
.Subscribe(position => Position = position);
}
Produces this.
This is so easy, a few lines of code which after a short learning curve becomes very easy.
Plus many more dynamic data examples. Additionally there are some examples which show how to integrate with ReactiveUI.
The menu looks like this and as you can see there are links to the code behind which hopefully will get you up to speed in no time at all
The examples are being regularly maintained so download again to see more examples.
- Press 'Download Zip', unpack and open
- Ensure Nuget Restore is enabled
- Set 'Trader.Client' as the startup project
- Press F5
- Follow me at @RolandPheasant
- Email at [roland@dynamic-data.org]
Also a big thanks to the guys behind Mahapps and Dragablz for their awesome oss projects. These have enabled me to easily make this demo look good.