Transcript NET Framework Overview

.Net Framework and C# Programming
Course Introduction
 祝伟华
 QQ:
190279325 / 13594050521
 Email:
[email protected]
 主教学楼:
 傅鹂
1009 网络新型服务技术中心
/ 祝伟华

傅鹂负责C#相关的高级编程

祝伟华负责.NET框架的编程
.Net Framework and C# Programming
Course Introduction
 You
are not learning another language here
 You
must do a lot of reading, self-study, and practice
 This
course has great value and very important
 You
must have these knowledge to begin

One Object Oriented Programming Language

TCP/IP Protocol

Database

Basic Web Development Experience

HTML, JavaScript etc
Books Recommended
 C# Advanced
Programming
 ADO.NET Advanced
Programming
 ASP.NET
For Beginner
 ASP.NET
Case Study
 Web
Service Programming
 XHTML,
 C#
CSS, AJAX
Design Pattern
.NET Framework Overview
.NET and the .NET Framework
Objectives
 Learn
basic principles and concepts of.NET and the
.NET framework
Contents
 Basic
Knowledge
 Looking
 .NET
Back
and .NET Framework Overview
 Summary
Basic Knowledge
 What’s
going on in software industry?
 What’s
going on in China?
 How
to succeed in this industry?
 Why
get your degree here?
 What
knowledge you must learn to survive in the
future?
 What
you must learn in this course?
Basic Knowledge
 Divide
and Conquer/Tree
 Reuse/Module/Class/Function
 Interface/Cohesion
 Layer/N
Tier
 Protocol/HTTP/XML/SOAP
 Standard
 Distributed





Computing
RPC
COM/DCOM
CORBA
RMI
WEB SERVICE
10 Requirements for Enterprise Applications
Why was .NET created?

Internet, .COM, .NET, Web 2.0, Web 3.0, Semantic Web

Computing resources
 Powerful desktops
 Remote servers.

The hugeness of the Internet.
 Low cost of the Internet.
 Wireless capabilities.

Multitude of connectable devices.
 PDAs
 Cell phones

Internet standards
 XML – eXtensible Markup Language
 SOAP – Simple Object Access Protocol
 UDDI – Universal Description, Discovery, and Integration
Section 1: Looking Back
 Challenges
for the development organization
 Challenges
for the corporate customer
 Applications
and services
Challenges for Development Organization
 Development

Language and operating system choices
 Delivery

CD-ROM: production, packaging, transport

Electronic delivery requires human involvement
 Stability

DLL compatibility issues

Operating system—pollution leads to instability

Compatibility tests with “popular” solutions
 Maintenance

Customer involvement, even for critical updates

Packaging, production, and delivery of medium
Challenges for the Corporate Customer
 Deployment

Installation often requires time and personnel

Testing for compatibility with existing applications and OS

License management
 Stability
and security

Requires (even more!) testing

Can lead to inadvertent breaches of security

Can destabilize the system or other solutions
 Maintenance

All the problems of deployment and security revisited!
Applications and Services
 Applications


Today’s solutions are services as applications
The future is not applications but services

Desktop Services: Today’s application + optional Web Services

Web Services: The application delivered to any device
 Today’s




Internet “services”
Delivered via Internet via a portal

www.hotmail.com

www.lycos.com
Not “portable”: Can’t take it with you as you browse
Some “intermediary” solutions exist:


as the service solution
www.passport.com
Browser, vendor, and device dependent
Requires interactive access
Section 2: .NET Framework Overview
 What
Is .NET?
 Migration
 Key
Paths—from Anywhere to .NET
Benefits of .NET
What Is . NET?
 The

combination of:
Framework

Common language runtime

Class libraries

ASP.NET

Web Services

.NET Enterprise Servers
 The
means to build the Web the way you want it!
.NET and the .NET Framework
Web Services
Office.Net
...
...
Building Blocks (e.g. for Services)
.NET Applications
Enterprise Servers
Languages:
SQL Server
C#, Visual Basic, etc
BizTalk
...
Runtime
Common
Type
System
Common
Language
Runtime
Services:
.NET Framework
Operating System
.NET and COM+
Framework, Languages, And Tools
VB
C++
C#
JScript
J#
Common Language Specification
Windows
Forms
ADO.NET and XML
Base Class Library
Common Language Runtime
Operating System
Visual Studio.NET
ASP.NET
Web Forms Web Services
Mobile Internet Toolkit
.NET Framework Diagram
Web
Services
User
Interface
Base Classes
Common Language Runtime
Base Frame
Data & XML
Common Language Runtime
 Highlights

Common type system


Mapping of data types. Programming language  Framework
Just-in-time (JIT) compilers

JIT compiles intermediary language (MSIL) into native code

Highly optimized for platform or device

Garbage collector

Permission and policy-based security

Exceptions

Threading

Diagnostics and profiling
Common Language Runtime Diagram
Base Class Library Support
Thread Support
COM Marshaler
Type Checker
Exception Manager
Security Engine
Debug Engine
MSIL to Native
Compilers (JIT)
Code
Manager
Class Loader
Garbage
Collector (GC)
More .NET Framework
 Namespaces
and Classes

Hierarchical, unified class libraries

Unified and extensible provide “system” and base
functionality and services

Object-oriented: everything is an object!

The systems uses the same classes offered to you
 Interfaces

The .NET (Service) contracts
 Types

Byte, Sbyte, Single, Double, String, Int16, etc.

These all map to the common type system
Unifies Different Programming Models
Consistent API availability regardless of
language and programming model
.NET Framework
RAD,
Composition,
Delegation
Visual Basic®
Forms
Subclassing, Power,
Expressiveness
MFC/ATL
Windows API
Stateless,
Code embedded
in HTML pages
ASP
Services
 .NET
and COM+ Services

Expose COM/COM+ functionality

Expose additional services needed to build solutions

ASP.NET session/state management

ASP.NET user management
 Building
Block Services

Basic services used to build applications and Web Service

Passport.NET

Calendar
 Enterprise
Servers
Web Services
 What

does “service” mean to you?
Think: service industry
 What
are Web services?
 What
is the business case?
 How
does .NET make them possible?
What Are Web Services?
 Any
service you can think of
 Some
potential or planned Web Services

Passport.NET

“Yellow Pages”

Dictionary/thesaurus (e.g., www.dictionary.com)

Small business services (e.g., www.FreeWorks.com)

Personal information management services
 Think:
“Access Anywhere”
How .NET Makes Web Services Possible
 .NET
 It
 It
is built on the idea of Web Services
uses Framework classes, such as

System.Web.Services

System.Web.Services.Description

System.Web.Services.Discovery
enables communication through open standards

XML



Service description expressed with WSDL
SOAP

Basic wire format

Universal Description Discovery Integration (UDDI)
HTTP
What Is the Business Case?
 Charge
 Offer
for currently “free” features and functionalities
different pricing models:

Pay-per-view (or use)

Multiple subscription models

Rental or leasing of your solution
 Create

an opportunity from “untapped” functionality
Publish your custom COM component as a pay service!
 Think:
“Access Anywhere = Opportunity Everywhere”
Orchestration 1/2
 What


is “orchestration”?
Creating a solution through integration of:

Disparate services and applications

Multiple data streams

Servers
Think: Unifying data and messages from everywhere
 What
are its benefits?

Save time by using existing infrastructure and solutions

Integrate legacy solutions with .NET solutions
Orchestration 2/2
Internet
.NET
Applications
ERP
Application
Mainframe/
Host
System
Internet and
Acceleration
Server 2000
Host
Integration
Server 2000
Exchange
2000 Server
SQL Server
2000
.NET Enterprise Servers
 BizTalk®
Server 2000
 Exchange
 SQL
2000 Server
Server™ 2000
 Integration,
Security and Acceleration Servers

Host Integration Server 2000

Internet Security and Acceleration Server 2000
 Application,
Services and Commerce Servers

Application Center 2000

Commerce Server 2000

Mobile Information Server 2001

SharePoint™ Portal Server 2001
BizTalk Server 2000
 Orchestration

Link different platforms, applications, and services

Enterprise Application Integration (EAI)
 Messaging—Use
of Open Standards

XML

Electronic Data Interchange (X12, UN/EDIFACT)

Hypertext Transfer Protocol (HTTP)

Simple Mail Transfer Protocol (SMTP)

Public key encryption

Digital signatures
SQL Server 2000
 Reliability
 Data
and scalability
warehousing

Analysis services

Natural language query (English query)

Data transformation services
 E-commerce

Web enabled

XML support

Built-in security
Exchange 2000 Server
 Messaging
and collaboration platform

Active Directory™ integration

Optimized for Microsoft Windows® 2000

Tight integration with Internet Information Services (IIS)

Single-seat administration
 Web
Storage System and native XML support

Open standards based (WebDAV, HTTP)

Powerful indexing and search

Easy application integration using ADO and OLE DB
Integration, Security, and Acceleration
 Host

Integration Server 2000
Integrate Internet, intranet, client/server, and host systems

Manage host access

Enable application integration
 Internet


Security and Acceleration Server 2000
Secure Web sites

Multilayer firewall

Intrusion detection
Accelerate Web sites

High performance advanced caching mechanisms

Scalability
Applications, Services, and Commerce
 Application

Deploy and manage high availability Web applications
 Commerce

Server 2000
Build tailored, effective e-commerce solutions
 Mobile

Center 2000
Information 2001 Server
Bring the NET to mobile devices
 SharePoint™
Portal Server 2001

Intranet portal and search

Document management

Collaborative applications

Web storage
.NET and the .NET Enterprise Servers
Internet
BizTalk
Server
2000
Mainframe/
Host
System
Internet and
Acceleration
Server 2000
Exchange
2000 Server
.NET Solutions
Host
Integration
Server
2000
SQL Server
2000
Migration Paths—From Anywhere to .NET
 What

isn’t migration?
Porting an existing solution to a new platform
 What
is migration?

Creating a bridge to current or future technology

Integrating legacy solutions into new solutions
 .NET
facilitates migration

eXtensible Markup Language (XML)

Simple Object Access Protocol (SOAP)

Hypertext Transfer Protocol (HTTP)

ASP.NET
Why use the .NET Framework?
C#
Just-In-Time
compiler
C# compiler
C++ compiler
C++
C
Scheme
Prolog
X
languages
C compiler
IL
Scheme compiler
JIT
AND
CLR
Prolog compiler
X compiler
compilers
Intermediate
Language
Common
Language
Runtime
Simulator
or
Hardware
Why use the .NET Framework?
 Multi-language
development

C#, C/C++, VB.NET, Eiffel, Fortran, Java, Pascal, Perl,
Python, Scheme, SmallTalk, and many more.

Allows you to use whatever language fits your
wants/needs
 Harness

the power of Visual Studio
Highly productive environment
 MSDN
Key Benefits of .NET 1/3
 Ease

Object-oriented model


of Use
Everything is an object
Namespace and Framework structure

Easier to comprehend and use

Naming scheme of namespaces reflects the underlying functionality
 Freedom
to Choose:

The language that meets your needs

The development tool that is best for you

The “features and functionality” to “plug in to”
Key Benefits of .NET 2/3
 Stability

Say “goodbye” to memory leaks

Garbage collection manages memory

Assembly eliminates DLL compatibility issues

Deliverables are restricted to an assembly
 Security

Restricting or containing the illegal memory reference

Comprehensive security model

Assembly specific

System wide

Code inspection through MSIL
Key Benefits of .NET 3/3
 Deployment
and Management

Deployment: Code is “Assembled” and Run “Securely”

Maintenance: Version Maintenance Simplified
 Unified

Experience
Integrate disparate services into a new, unified solution
 Web
 The
Services
Web the Way You Want It

Anywhere

Anytime

On any device
Summary
 The
.NET Framework provides the means to:

Deliver solutions anywhere, anytime, and on any device

Orchestrate existing distinct solutions into new ones

Migrate legacy solutions

Develop using the tools and languages of choice

Utilize existing and planned .NET Enterprise Servers

Create open solutions on open standards

Better develop, deliver, and maintain solutions

Produce secure, stable, and manageable solutions

Create and use Web Services

Produce extensible solutions