Introduction to
.NET
Rui Ye
Agenda
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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
What is Microsoft .NET
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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.
The basic elements of .NET
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Smart Clients
Web Services
Servers
Developer tools
What are Web services
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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.
XML Web services basics
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SOAP---Simple Object Access Protocol.
WSDL---Web Services Description
Language
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UDDI---Universal Discovery Description
and Integration
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XML Web Services basics (cont.)
Open
Internet
Protocol
XML Web
service
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UDDI – The Yellow Page of
Web service
UDDI
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WSDL – Describe Web service’s
interfaces in enough detail
WSDL
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SOAP– If XML represent the basic
language, SOAP is the grammar.
SOAP
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Base on open Internet protocol
XML and HTTP
What is .NET Framework
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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.
What is .NET Framework (cont.)
VB
C++
C#
JScript
…
Common Language Specification
Web Forms
Windows Forms
Data and XML
Base Class Library
CLR
Visual Studio .NET
XML Web
services
Basic components of
the .NET Framework
The .Net Framework consists of two main parts:
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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.
CLR: Execution model
Source
code
Managed
code
VB
C#
C++
Compiler
Compiler
Compiler
Assembly
IL Code
Assembly
IL Code
Assembly
IL Code
Common Language Runtime
Native Code
Operating System Services
Unmanaged
Component
.NET Framework class
library
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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.
.NET Framework class library (cont.)
Unified Classes
Web Classes (ASP.NET)
Controls, Caching, Security, Session, Configuration etc
Data (ADO.NET)
Windows Forms
ADO, SQL,Types etc
Design, Cmpnt Model etc
XML Classes
Drawing Classes
XSLT, Path, Serialization etc
Drawing, Imaging, Text, etc
System Classes
Collections, Diagnostics, Globalization, IO, Security,
Threading Serialization, Reflection, Messaging etc
Benefits of the .NET
Framework
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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.
Benefits of the .NET
Framework (cont.)
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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.
Visual Studio .NET
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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
Visual Studio .NET Features
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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#
Comparing .NET with J2EE
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.NET is a product, Java and J2EE is a
specification
Both address the web (among other
things)
The rule-of-thumb “Java is platformindependent,´.NET is language
independent“
must be considered carefully:
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ECMA works on the standardization of C# and parts
of .NET
Other languages can be compiled to the JVM
Comparing .NET with J2EE
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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
Reference
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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_NET_MV.ppt
Thanks
Questions?