Developing with .NET

Frank La Vigne

Developer Evangelist

Microsoft

@tableteer | FrankLa@Microsoft.comwww.FranksWorld.com/blog

A Quick Word About MSDN

Not just downloads• Documentation• Articles• Sample Code• Specialty sites• ASP.NET• Silverlight.net• WindowsClient.net

• And much more!

The Future

Soon, Very Soon.

Tools of the Trade

• Visual Studio 2010• Multiple versions with multiple price points

• Expression Blend

Nice to have tools• F12 Dev Tools• Fiddler• Silverlight Spy

.NET Everywhere

Web Windows Cloud Phone Games Data

Write .NET Code in All of These Environments

.NET Architecture

.NET Framework Architecture

Base Class Libraries

Common Language RuntimeJIT & NGEN

Garbage Collector

Security Model

Exception Handling

Loader & Binder

WPFWin

FormsDLR ASP.NET WCF

And more!

LINQ

BASE CLASS LIBRARIES(BCL) IMPROVEMENTS IN .NET 4.X

Task Parallel Library (TPL)

Set of public types and APIs System.Threading System.Threading.Tasks

// Sequentialforeach (var item in sourceCollection) { Process(item); }

// ParallelParallel.ForEach (sourceCollection, item => Process(item));

Parallel LINQ (PLINQ)

Implements the full set of LINQ standard query operators Extension methods for the IParallelEnumerable interface Additional operators for parallel operations

from n in names.AsParallel().WithDegreeOfParallelism(ProcessorsToUse.Value)where

n.Name.Equals(queryInfo.Name, StringComparison.InvariantCultureIgnoreCase) &&

n.State == queryInfo.State && n.Year >= yearStart && n.Year <= yearEnd

orderby n.Year ascending

select n;

Design By Contract

• System.Diagnostics.Contracts• Code Contracts introduce a way to specify contractual

information that is not represented by a method or type’s signature alone

• Scenarios for using contracts include:• Perform static bug finding, which enables some bugs to be found

without executing the code• Create guidance for automated testing tools to enhance test

coverage• Create a standard notation for code behavior, which provides

more information for documentation

Data Types

• BigInteger• Immutable type that represents an arbitrarily large integer whose

value in theory has no upper or lower bounds

• SortedSet<T>• Provides a self-balancing tree that maintains data in sorted order

after insertions, deletions, and searches

I/O

• Memory-Mapped File• Used to edit very large files and to create shared memory

for inter-process communication

• Stream.CopyTo• Allows you to copy the contents of one stream into another

EHANCEMENTS TO PROGRAMMING LANGUAGESIN .NET 4.X

Visual Basic

• Auto-Implemented Properties• Shortened syntax that enables you to quickly specify a property

of a class without having to write code

• Collection Initializer• Shortened syntax that enables you to create a collection and

populate it with an initial set of values

• Implicit Line Continuation• Enables you to continue a statement on the next consecutive line

without using the underscore character

C#

• Dynamic Type• Operations that contain expressions of type dynamic are not

resolved or type ch`ecked by the compiler. The compiler packages together information about the operation, and that information is later used to evaluate the operation at run time

• Optional and Named Parameters• Named arguments enable you to specify an argument for a

particular parameter by associating the argument with the parameter's name rather than with the parameter's position in the parameter list.

• Optional arguments enable you to omit arguments for some parameters. Both techniques can be used with methods, indexers, constructors, and delegates.

C++

• You can configure restart manager to autosave documents and restart your application after it exits unexpectedly

• Lambda expressions are available in C++• The new CTaskDialog replaces the standard Windows

message box and adds functionality to display and gather more information

F#

• IDE support for F#• Interactive F# for prototyping code• Asynchronous constructs• Parallel constructs• Immutable data types

Web Client Development

But What About?

I <3 Silverlight!

You Can Use Them Both

• Blue Angels Web Site• http://blueangels.navy.mil

Looking Forward

Site Pinning

http://buildmypinnedsite.com/

The Microsoft Web Platform

Web

Pla

tfor

m I

nsta

ller Ajax Control Toolkit & jQuery

ASP.NET

ADO.NET Entity Framework

SQL Server

IIS

The Microsoft Web Platform combines a rich and powerful web application framework with a supporting cast of tools, servers, technologies and applications for creating, designing, developing and delivering web solutions.

Today’s Web Developers

I <3 Web Apps.

I just need a tool that

makes them easier to

configure, customize and

publish them

I want to build web sites myself with an

easy to learn tool and framework

I’m a professional software developer and I build complex, large scale web sites with a

team of developers

A Free Web Dev Tool

ASP.NET: A Framework For All

Caching Modules

HandlersIntrinsics

Pages Controls

Globalization

Profile

Master Pages

MembershipRoles

Etc.

ASP.NET Core

ASP.NET Web Forms

ASP.NET MVC

ASP.NET Web Pages

Web Forms View Engine Razor View Engine

Visual Studio 2010 WebMatrix

ASP.NET 4 Webforms

• Ability to set meta tags• More control over view state• Added and Updated browser definition files• ASP.NET Routing• The ability to persist selected rows in data controls• More control over rendered HTML in the FormView and

ListView controls• Filtering support for data source controls

CHOICE IS GOOD

WHAT IS MVC?

Model-View-Controller (MVC)

• Huge investment from Microsoft• Alternative to WebForms• Modular Architecture• MVC 3.0 now available• MVC 4 in Developer Preview stage

• Razor Syntax• MVC 3.0 Tooling Updated

April 2011

ASP.NET MVC 101

Model(Data)

View(Presentation)

Controller(Input)

• What does MVC look like?

How MVC Works

Request

View

Controller

Response

ControllerRetrieves Model“Performs Work”

ViewVisually representsthe model

WHY SHOULD WE CARE ABOUT ASP.NET MVC IN PUBLIC SECTOR?

More Web Savvy Citizens

• Users disdain “Ugly” URLs• http://answers.usa.gov/system/selfservice.controller?

CONFIGURATION=1000&PARTITION_ID=1&CMD=VIEW_ARTICLE&ARTICLE_ID=11951&USERTYPE=1&LANGUAGE=en&COUNTRY=USvshttp://www.whitehouse.gov/briefing-room/speeches-and-remarks

• Search Engine Optimization (SEO)• Discoverability

Developer Productivity

• Powerful, patterns-based way to build dynamic websites • Enables a clean separation of concerns• Gives you full control over markup for enjoyable, agile

development.

Testing

• Enable fast, TDD-friendly development for creating sophisticated applications

• Separation of concerns makes for easier testing

Accessibility

• Uses the latest web standards.• Full control over markup makes creating

compliant sites easier

Performance

• No ViewState • Smaller HTML payload• Faster downloads

• HTML5• Easy to implement eye catching graphics that leverage GPU

acceleration with IE9 and IE10

DEMOCreating an ASP.NET MVC 3 Project

Razor

@if (You.Understand(Razor)) {

<div>Hooray!</div>

}• New, Simplified View Engine• Write fewer lines of code• More natural mix code and markup• Helpers save you time• Compatible with ASP.NET Web Pages in WebMatrix• http://bit.ly/WhatIsWebMatrix

Razor Syntax

Razor: a Cut Above the Rest

<ul> <% for (int i = 0; i < 10; i++) { %> <li><% =i %></li> <% } %></ul>

<ul> @for (int i = 0; i < 10; i++) { <li>@i</li> }</ul>

Razor (2 markup transitions):

Web Forms (6 markup transitions):

<ul> <?php for ($i = 0; $i < 10; $i++) { echo("<li>$i</li>"); } ?></ul>

PHP(2 markup transitions

& an echo):

Easier Code to Markup Transitions

@{ var name = “John Doe”; <div> Your name: @name </div>}

@{ var name = “John Doe”; @: Your name: @name}

Option 3:Single line of output

in markup

Option 1:HTML Block

@{ var name = “John Doe”; <text> Your name: @name </text>}

Option 2:Text Block

Code Comments in Razor

@* <div> Hello World </div>*@

@* @{ var name = "John Doe"; @name }*@

Option 3:Both

Option 1:Markup

@{ //var name = "John Doe”; //@name}

Option 2:Code

SILVERLIGHT & WPF DEVELOPMENT

Two Platforms

Similar But Different

WPF

Silverlight

2 Platforms Powered By XAML

Two Core Technologies

One Common Language

XAML Powers It All

Intro to XAML

• Markup language derived from XML• XML serialization of CLR objects• Markup files have code-behind files• Could be C# or VB.NET

• Conceptually similar to ASP.NET • X stands for Extensible• Data Binding• Styles• Templates

Relax, it’s just XML.

What Does XAML Look Like?

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:sys="clr-namespace:System;assembly=mscorlib"

xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" > <Grid>

<Button>Click Me!</Button> </Grid></Window>

Results

Most Devs Reaction to Blend

Demo

Mobile

1 Platform. 2 Choices.

For the purposes of this talk, we’ll focus on Silverlight.

What is Metro?

ETRO

METRO IS OUR DESIGN LANGUAGE. WE CALL IT METRO BECAUSE IT’S MODERN AND CLEAN. IT’S FAST AND IN MOTION. IT’S ABOUT CONTENT AND TYPOGRAPHY. AND IT’S ENTIRELY AUTHENTIC.

Desktop?

Metro Resources

• http://frnk.us/8GreatTraitsOfMetroApps• http://frnk.us/MetroTutorial

DEMOCreating a Windows Phone App

Marketplace Sample

What is the Entity Framework?

• Creates Entity Model from Database• Helpful in creating RESTful Services• Exposes Database as Classes/Methods• Works with any Database• Useful in MVC, Dynamic Data Models

Code-First in EF 4.1

ExistingDatabase

GeneratedEntity Data

Model

DatabaseFirst

Entity DataModel

GeneratedDatabase

ModelFirst

DEMO

Useful Resources

Phone SDK Download

http://bit.ly/WinPhoneSDKDownload Web Matrix

http://bit.ly/WhatIsWebMatrix Azure

http://bit.ly/FreeAzure90DayTrial

http://bit.ly/DownloadAzureSDK