Presenters:

1
Microsoft
NET
.

• Presenters
• Monica Murguia
• Than Nyinyi
• Nothmar Noriel
• Sumitha Nagaloncha

2
Presentation Outline

• Overview of .NET
• .NET Languages
• .NET Web Services
• ADO.NET, .NET My Services, and .NET/COM
  Interoperability.

3
Overview
What is .NET?

• Microsoft .NET is a new foundation for solving
  common problems and building Windows
  applications.
• An add-on run-time environment that runs on
  Windows 2000 operating systems.

4
Overview

• A way to think about this new technology is to
  view .NET as a brand, one that Microsoft has
  applied to several technologies.
• Some of the technologies are new (providing new
  services and possibilities) and others allow an
  updated approach to creating Windows applications
  that we know today..

5
Overview
Why .NET?

• Microsoft .NET will affect anyone who works in
  the Windows environment.
• However, Most Windows developers once learn
  and implement this new tools and techniques will
  find themselves capable of building more
  powerful, more useful software in less time.

6
Overview

• The .NET Technologies today include
• - .NET framework
• - Visual Studio .NET
• - .NET My Services
• - .NET Enterprise Servers
• Most technologies that carry the .NET brand
  have direct support from Web Services.

7
Overview

• .NET framework is new environment for creating
  applications. Because the foundation is the
  same, developers see a much more consistent
  environment.
• The .NET framework includes CLR (Common Language
  Runtime) and the .NET Framework class library
  (ASP.NET, ADO.NET, Windows forms, Enterprise
  Services, and much more).

8
Overview
The .NET Framework
9
Overview

• Visual Studio.NET supports several programming
  languages that can be used with .NET framework
• Visual Studio.NET supports four CLR-based
  languages
• - Visual Basic.NET
• - C
• - C,
• - and Jscript.NET

10
Overview

• .NET My Services is set of Internet-accessible
  Web services. It allows users to store and
  access the same personal information such as
  calendar from your home PC or Wireless PDA.

.NET My Services
Internet
Clients
Applications
11
Overview

• .NET Enterprise servers provide a useful set of
  services (BizTalk Server 2000, Application Server
  2000, Commerce Server 2000, Host Integration
  Server 2000, SQL Server 2000, Exchange Server
  2000, Mobile Information Server 2001, and
  Internet Security and Acceleration Server 2000).

12
.NET Language
13
With COM, Reality of software plug and play.Net
is much simpler to use.
JAVA C VB

• COM supports language independence
• .Net supports language integration. You can
  extend a class hosted in .Net and can catch
  exceptions thrown by the code in .Net.

COM
.NET
C VB
Java
14
How does .Net ensure Language Integration

• First, there is adherence to the common type
  system (CTS). There are value types, which are
  simple data types like integers and float, and
  reference types
• By enforcing the different types of data into two
  generic types of data, multiple languages can
  intermingle with one another.
• Ensures code stability

15
How does .Net ensure Language Integration

• Second, there is adherence to the common language
  specification (CLS). CLS defines conventions
  that languages must support in order to be
  interoperable in .Net.
• There are close to 40 conventions which the
  languages must obey.

16
How does .Net ensure language integration

• Third, there is a unified, extensible class
  library.
• Hundreds of classes, interfaces, types, and
  structures grouped into a hierarchical system of
  namespaces that contain logically related
  classes.
• Full level of Object-Oriented Programming support

17
How does .Net ensure language integration

• Fourth, all different languages are compiled into
  what is called Microsoft Intermediate Language
  (MSIL).
• Similar to Java bytecode, which must be converted
  into native code by the common language runtime.

JAVA C Visual Basic
MSIL
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How does .Net ensure language Integration

• Fifth, the Common Language Runtime (CLR), similar
  to a Java Virtual Machine, provides important
  execution-support and management services.
• Garbage collection, Exception Handling, Security
  Support, Debugging Support, and Interoperation
  support.

19
How does .Net simplify deployment compared to COM

• Definitions of assembly, metadata, manifest
• Avoid DLL Hell
• Loads correct version of DLL files because of the
  information contained in the metadata and
  manifest.

20
.NET Web Services
21
Overview of .NET Web Services

• Microsoft .NET Services allows software
  components and applications to be accessed on the
  web using standard web protocols such as HTTP,
  SMTP and XML

HTTP
Software component
XML
22
Web Services in a Distributed Environment

• Web Services are the building blocks of software
  development
• Web services components allow for
  interoperability of distributed environment

Web Services
23
Description of .NET Web Services

• What is Web Services?
• Software can be provided as a service on the
  Internet
• The software component is stored in a standard
  industry format
• Microsoft Passport
• Microsoft Hailstorm

24
.NET Web Services Architecture

• Web services can be used by any application that
  can read and parse XML formatted data streams
  that are transmitted through HTTP protocol

Web Application
Presentation Layer
Web Service
HTML
HTTP
Business Layer
XML
Web Service
XML
Data Layer
25
.NET framework

• Web Service format
• Web services are exposed to Web users using a
  standard web protocol such as SOAP
• Web Service Description
• Describes a Web Service interface and how it can
  be used using WSDL (Web Services Description
  Language)
• Web Service Discover
• Allows a Web Service to be registered and made
  available to users, described using UDDI
  (Universal Discovery Description and Integration

26
XML Technology

• Extensible Markup Language (XML) is the standard
  universal format for data on the internet
• XML delivers and describes data in a consistent
  and structured form
• XML complements HTML, does not replace HTML

27
SOAP

• Standard communication protocol of .NET Web
  Services
• Specification that uses HTTP protocol to
  transport XML format for messages
• Wire protocol that uses openly available
  technologies
• Supports stateless programming model
• Lightweight protocol

28
WSDL

• XML Schema of a web service description document
  is WSDL (Web Service Description Language)
• Interface that allows web service clients to
  interact and understand web service
• Can be implemented by any SOAP enabled client
• Language Independent

Web Service
WSDL Interface
SOAP
Clients
29
UDDI

• Universal Description, Discovery and Integration
  (UDDI) is the yellow pages of Web Services
• Business can publish their web service
• Business can locate a web service
• UDDI becomes a central location where web
  services can be located

Web Services
Web Services
UDDI - Yellow Pages
30
ADO.NET, .NET My Services, .NET/COM
Interoperability
31
Overview of ADO.NET

• Data access technology built into .NET Framework
• It is a set of .NET classes which provides access
  to heterogeneous datasources
• Built on top of CLR
• Provides better support for disconnected data
  access
• Data centric as opposed to database centric
• Tight integration with XML

32
A Object Model of ADO.NET
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Benefits of ADO.NET

• Disconnected data sources
• XML Serialization
• Performance and Scalability

34
Overview of .NET My Services

• It is a set of internet accessible webservices.
• It can be accessed from desktop machine, personal
  digital assistant (PDA), mobile phone and other
  devices.
• Consists of network authenticated service
  together with a set of SOAP callable web
  services.
• Services are provided by distributed group of
  services maintained by Microsoft and other
  companies.
• Each services provide a specific function.

35
Services Provided

• .NET Alerts
• .NET Calendar
• .NET Contacts
• .NET Inbox
• .NET Documents
• .NET Wallet
• .NET Lists
• .NET Profile
• .NET Presence

36
Describing .NET My Services

• The Authentication Service Passport
• XML Based Services

37
Authentication Service
38
.NET / COM Interoperability

• Why do we need it?
• COM is the backbone of all DNA (Distributed
  Network Architecture) technologies
• Applications typically use COM components as
  either home grown or bought offshelf
• COM / .NET interoperability refers to the concept
  of a COM component being able to use .NET
  component and vice-versa
• DNA to .NET migration will typically be done in
  stages
• Interoperability is essential when existing COM
  components want to use .NET components
  vice-versa and during migration path from DNA to
  .NET

39
.NET Frameworks Com Interoperability
40
End