Windows 8 Metro LOB App .NET 4.5 Category Features with Web API, Entity Framework Code First, Nuget, JSON.NET & Async -Await

Since the Asynchrony power of .NET 4.5 , it reveals the capability of building Windows 8 Metro LOB apps with ASP.NET Web API service , Entity Framework Code first support in backend. The Windows 8 Metro Enterprise app blocks keeps running with ASP.NET Web API , MVC 4, WCF Data Services , Azure Mobile Services keeping on backend as data provider model either in JSON or Atom/XML/RSS format.

The Asynchorony pattern on .NET 4.5 keeps the understanding of TPL (Task Parallel Library) with tremendous explore on APM model architecture pattern on C# Async -Await protocols. The HTTP client asynchorony pattern is greatly demandable with async-await styles for any standard clients (Windows 8 Metro Line-Of – Business Apps with POC , Windows Phone etc) implementations keeping Web Service with dataaccess on backend.

Lets have a look on a smart Metro Enterprise app built on ASP.NET MVC 4 Web API services connecting SQL data access with entity frameworks code first approach.

  • The app covers the entire .NET Framework 4.5 features from Code Contracts to Task Parallel Library (TPL)

  • The app has ASP.NET MVC 4 Web API support as data access strategy with Entity Framework & Code First approach.

Code snippet for FeatureDataSource.cs:

public  class FeatureDataSource


private static FeatureDataSource _sampleDataSource = newFeatureDataSource();

private ObservableCollection<FeatureDataItem> _items = newObservableCollection<FeatureDataItem>();

public ObservableCollection<FeatureDataItem> Items


get { returnthis._items; }


public FeatureDataSource()




public static IEnumerable<FeatureDataItem> Get()


return _sampleDataSource.Items;


public static FeatureDataItem Get(int id)


return _sampleDataSource.Items.FirstOrDefault(i => i.Id == id);


private async void Initialize()


using (var client = newWebBackendClient())


List<int> list = await client.Download<List<int>>(“/featuressummary”);

foreach (var i in list)


FeatureDataItem  feature = await client.Download<FeatureDataItem>(“/featuressummary/” + i);







  • The Asynchronous Programming Model (APM) has in-built support for Async -Await patterns for non-blocking thread operations & execution of Tasks. The Task Parallel Library is supervized with Data Parallelism & Task Parallelism which is basic coding snippet for Windows Clients HTTP operations (HttpClient,SyndicationClient, Async-Await) from Web API REST or WCF Data Services or Atom/RSS feeds.

  • More on Asynchronous Programming Model (APM) pattern for Windows Client (Windows 8 Metro Enterprise Apps, Windows Phone), Windows Azure , Windows Server can be here.

  • The Task Parallel Library (TPL) for .NET Framework can be diversified with Data Parallelism, Task Parallelism , Parallel LINQ (PLINQ) support majorly. The Windows 8 Metro Enterprise app blocks is patternized with TPL & Asynchronous platform.

  • The Parallel Computing is based on Asynchronous Pattern of Async-Await protocols on HTTPClients , similar way it provides support for web access , image , URL, Web Sockets, Diagnostics API support while it connects with raw WCF services too.

  • The Architecture of Task Parallel Library :

  • More on Task Parallel Library (TPL) for .NET Framework 4.5 support can be found here.

The Windows 8 Metro LOB app can be found in Windows Store Samples

About Anindita
Anindita Basak is working as Big Data Cloud Consultant in Microsoft. Worked in multiple MNCs as Developer & Senior Developer on Microsoft Azure, Data Platform, IoT & BI , Data Visualization, Data warehousing & ETL & of course in Hadoop platform.She played both as FTE & v- employee in Azure platform teams of Microsoft.Passionate about .NET , Java, Python & Data Science. She is also an active Big Data & Cloud Trainer & would love share her experience in IT Training Industry. She is an author, forum contributor, blogger & technical reviewer of various books on Big Data Hadoop, HDInsight, IoT & Data Science, SQL Server PDW & PowerBI.

One Response to Windows 8 Metro LOB App .NET 4.5 Category Features with Web API, Entity Framework Code First, Nuget, JSON.NET & Async -Await

  1. Pingback: Windows 8 Metro LOB App .NET 4.5 Category Features with Web API, Entity Framework Code First, Nuget, JSON.NET & Async -Await | Windows Azure by Design |

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