Net framework

The Microsoft® .NET Framework

Presented by

Joseph J. Sarna Jr., MCSD

JJS Systems, LLC

Agenda

• Introduction to .NET and Web Services• The .NET Framework• Common Language Runtime• .NET Framework Services• Common Language Specification• .NET Development Tools

How Did We Get to .NET?The Evolution of Web Applications

• First generation of Web applications -non-interactive content (HTML static content)

• Second generation of Web applications - scalable back-end and a richer User Interface. (DCOM, ASP, CGI, Cold Fusion, dynamic content)

• Third generation of Web applications (.NET) - using Web protocols and XML to allow better integration between services on the Web

What is .NET?

• .NET is Microsoft’s entry into the Web services arena• XML based

Why the Move to .NET?

• DCOM works fine on an Intranet, however:– DCOM does not go through firewalls– Requires too many open TCP/IP ports– Requires Stateful connections– Platform dependent

• Portals provide services however:– Non-standard interfaces– Hard to integrate with other applications– Not designed to use outside the scope of the portal

What Is A Web Service?

• A programmable application, accessible as a component via standard Web protocols

• Defined in terms of the required formats and ordering of messages

• You can ask a site for a description of the Web Services it offers

• Web Service consumers can be any device - send and receive messages using XML

• All built using open Internet protocols

XML Is The Core

• Simple, open, broadly adopted

• Continues the Web’s open standards

• Enables powerful distributed apps

• A universal data exchange format

XML Format

• XML is a tagged mark-up representation of data• XML consists of a header section, a schema section,

and a data section• The header section defines the XML form itself• The schema section defines the format of the data

contained in the XML document• The data section provides the mapped data

• C:\SicCodes.XML

SOAP Simple Object Access Protocol

• Internet becomes integration fabric• Broad industry support

• IBM, Iona, Ariba, Compaq, Lotus, Commerce-One, HP, SAP, others

• Submitted to W3C: • http://www.w3.org/TR/SOAP/

• XML-based integration for web services

Benefits of Web Services

• Leverages exiting infrastructure• Allows the choice to buy or build the functionality• Use of tested standard modules for repeatability• Minimizes development time and cost• Allows integration between applications, platforms,

businesses

Agenda


What Is the .NET Framework?

• A collection of technologies that– Unite isolated Web applications– Make information available anytime, anywhere– Simplify development and deployment

• How does .NET achieve the above?– Web Services– ADO.NET Datasets and XML support throughout the platform – Rich tools, runtime services and XCOPY Deployment

.NET Framework, Languages, Tools

Base Class Library

Common Language Specification

Common Language Runtime

Data and XML

VB C++ C#

Visu

al Stu

dio

.NE

T

WebServices

JScript …

UserInterface

Agenda



Base Class Library



Data and XML

VB C++ C#

Visu

al Stu

dio

.NE

T

WebServices

JScript …

UserInterface

The .NET Common Language Runtime

• Manages running code• Threading• Memory management

• Multi-language• Inheritance, Errors, Debugging

• Fine-grained evidence-based security• Code access security• Role-based security• Integrated with underlying OS

• “No-touch” deployment


Class Loader

IL to NativeCompilers

CodeManager

GarbageCollector

Security Engine Debug Engine

Type Checker Exception Manager

Thread Support COM Marshaler

Base Class Library Support

Common Language Runtime Design Goals

• Dramatically simplify application development• Provide a robust and secure execution environment• Support multiple programming languages• Simplify deployment and management

Agenda


.NET Framework Services

Base Class Library



Data and XML

VB C++ C#

Visu

al Stu

dio

.NE

T

WebServices

JScript …

UserInterface

.NET Framework Services

• ASP.NET– Logical evolution of ASP (compiled)

• Web forms– Manageable code (non spaghetti)

• Windows® forms– Framework for building rich clients

• ADO.NET, evolution of ADO– New objects (e.g., DataSets)

• XML Support Throughout

Some .NET Base Class Libraries

System

System.Data System.Xml

System.Web

Globalization

Diagnostics

Configuration

Collections

Resources

Reflection

Net

IO

Threading

Text

ServiceProcess

Security

Design

ADO

SQLTypes

SQL

XPath

XSLT

Runtime InteropServices

Remoting

Serialization

Serialization

Configuration SessionState

Caching Security

Services Description

Discovery

Protocols

UI HtmlControls

WebControls

System.Drawing

Imaging

Drawing2D

Text

Printing

System.WinForms

Design ComponentModel

Agenda



Base Class Library



Data and XML

VB C++ C#

Visu

al Stu

dio

.NE

T

WebServices

JScript …

UserInterface


• What about types?– Common type system (CTS)

• Other languages and compilers– Common Language Specification (CLS)

.NET Languages

• The .NET Platform is Language Neutral• All .NET languages perform the same• You can leverage your existing skills

• Common Language Specification• Consumer: Can use the .NET Framework• Extender: Can extend the .NET Framework

• Microsoft provides:• VB, C++, C#, JScript

• Third-parties are building• APL, COBOL, Pascal, Eiffel, Haskell, ML, Oberon, Perl,

Python, Scheme, Smalltalk

.NET Languages Available (or soon to be)

• Visual Basic• C#• Jscript• C++• Perl• Python• COBOL• Haskell• ML• Ada

• Pascal• C• SmallTalk• Oberon• Scheme• Mercury• APL• Eiffel• Oz• Objective Caml

Agenda


.NET Development Tools

Base Class Library



Data and XML

VB C++ C#

Visu

al Stu

dio

.NE

T

WebServices

JScript …

UserInterface

Visual Studio® .NET

.NET .NET PlatformPlatform

Man

age

Man

age

and

Co

llab

ora

tean

d C

oll

abo

rate

DeploymentDeployment

TestingTesting

DevelopmentDevelopment

DesignDesign

AnalysisAnalysis

PlanningPlanning

Summary

• We covered:– Introduction to .NET and Web Services– The .NET Framework– Common Language Runtime– .NET Framework Services– Common Language Specification– .NET Development Tools

Resources for .NET

• http://www.w3.org/TR/SOAP/ - W3C standards for SOAP implementation

• http://www.uddi.org – UDDI standards for web services implementation

• http://www.microsoft.com/net - Microsoft .NET home• http://msdn.microsoft.com/net - Microsoft .NET developers home• http://msdn.microsoft.com/xml - Microsoft XML developers home• http://msdn.microsoft.com/webservices – Microsoft Web Services

developers home• http://www.gotdotnet.com – Developers .NET resource

Technology

Net framework