Introduction to .NET

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Introduction to .NET

• Rui Ye

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Agenda

• What is Microsoft .NET
• The basic elements of .NET
• What are Web services
• XML Web services basics
• What is .NET Framework
• Basic components of the .NET Framework
• Benefits of the .NET Framework
• Visual Studio .NET
• Comparing .NET with J2EE

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What is Microsoft .NET

• Microsoft .NET is a set of software technologies
  for connecting information, people, systems, and
  devices. This new generation of technology is
  based on Web services---small building-block
  applications that can connect to each other as
  well as to other, larger applications over the
  Internet.

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The basic elements of .NET

• Smart Clients
• Web Services
• Servers
• Developer tools

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What are Web services

• The foundation of .NET is Web services.
• Web services allow applications to share data.
• Web services are discrete units of code each
  handles a limited set of tasks.
• They are based on XML, the universal language of
  Internet data exchange, and can be called across
  platforms and operating systems, regardless of
  programming language.

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XML Web services basics

• SOAP---Simple Object Access Protocol.
• WSDL---Web Services Description
• Language
• UDDI---Universal Discovery Description
• and Integration

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XML Web Services basics (cont.)
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What is .NET Framework

• The .NET Framework is an important new component
  of the Windows family of operating systems. It is
  the foundation of the next generation of
  Windows-based applications that are easier to
  build, deploy, and integrate with other networked
  systems.

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What is .NET Framework (cont.)
VB
C
C

JScript
Common Language Specification
Web Forms
XML Web services
Windows Forms
Data and XML
Base Class Library
CLR
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Basic components of the .NET Framework

• The .Net Framework consists of two main parts
• Common language runtime
• Provides the common services for .NET
  Framework applications. Over 27 languages
  supports today.
• .NET Framework class library(Three key
  components)
• ASP .NET Windows Forms ADO .NET.

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CLR Execution model
Source code
VB
C
C
Unmanaged Component
Compiler
Compiler
Compiler
Managed code
Assembly IL Code
Assembly IL Code
Assembly IL Code
Common Language Runtime
Native Code
Operating System Services
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.NET Framework class library

• ASP .NET to help build Web applications and Web
  services.
• Windows Forms to facilitate smart client user
  interface development.
• ADO .NET to help connect applications to
  databases.

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.NET Framework class library (cont.)
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Benefits of the .NET Framework

• Helps IT professionals better integrate existing
  systems with its native support for Web services.
• Assists with deployment of software to both users
  and Web servers.
• Facilitates the development of software with
  improved reliability, scalability, performance,
  and security.

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Benefits of the .NET Framework (cont.)

• Helps developers be more productive by
• 1. Making it easier for them to reuse
  existing code.
• 2. Enabling them to more easily integrate
  components written in any of the more than 20
  supported programming languages.
• 3.Helping them more easily build software
  for a wide range of devices using same skills and
  tools.

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Visual Studio .NET

• Integrated Development Environment
• Visual Basic.NET
• Many language enhancements
• Inheritance,Overloading, Free Threading
• Visual C
• Integration with .NET Framework with managed
  extensions (classes)
• C
• New development language
• Based on C/C with Garbage Collection/Memory
  Management

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Visual Studio .NET Features

• Single IDE for all Languages
• Server Explorer
• Event Viewer, Message Queues, Services
• SQL Databases, Data Connection, Etc.
• Integrated IE Browser
• HTML/XML Editors
• Macros/Macro Explorer
• Solution Explorer
• Tabbed Documents
• Dynamic Help
• Common Forms Editor
• VB.NET, C, and C

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Comparing .NET with J2EE

• .NET is a product, Java and J2EE is a
  specification
• Both address the web (among other things)
• The rule-of-thumb Java is platform-independent,.
  NET is language independent
• must be considered carefully
• ECMA works on the standardization of C and parts
  of .NET
• Other languages can be compiled to the JVM

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Comparing .NET with J2EE

• Windows Applications are probably better done
  with .NET than Java
• Java should be used when platform -independence
  is necessary
• Java is more mature
• Both can be used for web services - .NET is
  nicer, J2EE is more scalable

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Reference

• Microsoft Corporation, 2002 MCAD/MCSD Self-Paced
  Training Kit Developing Web Applications with
  Microsoft Visual Basic .NET and Microsoft Visual
  C .NET
• Microsoft Corporation, 2002 MCAD/MCSD Self-Paced
  Training Kit Developing XML Web Services and
  Server Components with Microsoft Visual Basic
  .NET and Microsoft Visual C .NET
• http//www.microsoft.com/net
• http//msdn.microsoft.com/net
• http//www.voelter.de/data/presentations/J2EE_vs_N
  ET_MV.ppt

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Thanks

• Questions?