presentatie .net 4/vs2010

VS2010 & .NET 4.0Capgemini BAS / Capgemini Technology ServicesMicrosoft Professionals Meet & Greet 29 september 2009

http://www.microsoft.com/

Microsoft Meet & Greet / 29 september 2009

Agenda

Wat is nieuw in .NET 4.0?

C# 4.0

Dynamic keyword

Parallel Extensions

TDD Visual Studio 20102



Wat is nieuw in 4.0?

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WinForms

ASP.NET

WPF

.NET CLR

LINQ MEFParallel

Extensions

Languages

CoreDLR

Base Class

Library

Data Services

Workflow Foundation

Communication

Foundation

“Velocity”

Entity Framework

LINQ to SQL

ADO.NET



Framework Verbeteringen: WF/WCF

WF en WCF werken beter samen om lang draaiende workflows te kunnen programmeren

WF is uitgebreid met System.Activities

Eenvoudiger delen eigenschappen zonder DependencyProperties

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Wat is nieuw in C# 4.0

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Optional parameters

Mogelijkheid om standaard waardes te implementeren in methodes

• public static void DefaultExample(string x, int i = 100){…}

DefaultExample(“test”);

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Named arguments

Mogelijkheid om de parameter volgorde te wijzigen bij het aanroepen van methodes

• public static void NamedExample(int x, string y, int j){…}

NamedExample(j:20, y:”Foo”, x:10);

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Generic Variance

Co-variance (specific to generic):

List<string> strings = new List<string>();

strings.Add( "hello" ); strings.Add( "goodbye" ); List<object> objects = new

List<object>(); objects.AddRange( strings );

Contra-variance (generic to specific)Action<Student> submitLetter = (Person p) => { SendMailTo(p.HomeAddress); };

Deze voorbeelden werkten niet in C# 3.5

Maar doen het wel in 4.0!

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Dynamic objects

object obj = tdse.GetObject(tcmUri, EnumOpenMode.OpenModeView, null, XMLReadFilter.XMLReadAll );

string title = null;if (obj is Component){ Component component = (Component) obj; title = component.Title;}…else if (obj is Page){ Page page = (Page) obj; title = page.Title;

}Display(title);

dynamic tridionItem = tdse.GetObject(tcmUri, EnumOpenMode.OpenModeView);

string title = tridionItem.Title;

Display(title);

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Dynamic objects

Code wordt tijdens runtime geëvalueerd

Object moet gedeclareerd worden met dynamic keyword

Geen IntelliSense support

DynamicObject baseclass om dynamisch gedrag zelf te bepalen

dynamic is geen var!

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DynamicObjects

Demo



Parallel Extensions

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Parallel Extensions

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Parallel class • static (overloaded) methods• helper methods to create/work with Tasks• encapsulates common patterns



Parallel Extensions

Simpele parallele for loop:

int steps = 10;Parallel.For(0, steps, (i) => { Console.WriteLine(i); });

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Parallel Extensions

Dit kan ook met PLINQ:

var q = from p in people.AsParallel() where p.Name == queryInfo.Name && p.State == queryInfo.State && p.Year >= yearStart && p.Year <= yearEnd orderby p.Year ascending select p;

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Parallel Extensions

Demo



Visual Studio 2010

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TDD met VS2010

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Write Test

Fail

Pass

Code

Refactor

N

Y

N

Y

Re-test

•Technique based on test-first approach• Write test first• Write code to pass test

• Benefits• Keeps focus on functionality of code• Full code coverage• Cleaner code



TDD met VS2010

Demo



TFS2010

•Test Impact Analysis• Setup by creating a teambuild• Finds code impacted by changes• Two Views

• Impacted tests• Changed code

• Visual Studio Team System

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Together. Free your energies


Remarks• Info uit deze presentatie is gebaseerd op

Beta1 van .NET 4.0 en VS2010!

Together. Free your energies


• Niels Vrolijk: [email protected]

• Klaas Depenbrock: [email protected]

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