DOT NET

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DOT NET
Brent Baker Janet Montalvo
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What is it?
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Presenting the dotNET Strategy

• New Delivery Model -gt Software as a service
• Improving upon COM components

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Why? Wireless Mass-Consumer devices

• Big application market
• Need open solutions
• Uncouple application from Operating System

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Open Standards

• Promote Interoperability
• Standard APIs for the Web
• Public Interfaces, Private Implementation

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Web Services Model

• Provider hosts component on Web
• Trustworthy components
• Work like ants adaptive swarms
• Subscription usage fees

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Ubiquitous Computing
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Summary

• App Loosely couples to OS
• Open Standards
• Inter-Communicate in standard way between
  consumers and providers
• Hide complexity on global deployment

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WHAT DOES IT DO?
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Presenting the dotNET Framework

• Simplicity is key for provider acceptance
• A framework free of known constraints
• Common ways to develop

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A Virtual Platform

• Language neutral
• User Interface
• Base Objects
• Run Time Engine (JIT Compiler)
• Platform-neutral
• Operating System
• MSIL

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MSIL simplifies the development

• MSIL
• Managed Code
• Metadata
• Self-Describing no IDL
• Simpler Deployment
• Registry, GUIDs, Version Control

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CLR does things on your behalf

• Plumbing
• CoCreateInstance,HRESULT
• Reference Counting
• Garbage Collection, Memory Management

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DLL Hell

• No central entity controls all DLLs
• COM versions can be overwritten
• ltmajor versiongt.ltminor versiongt.ltbuild
  numbergt.ltrevisiongt

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Backwards/Forwards Compatible

• COM to dotNET needs Runtime Callable Wrapper
  (RCW)
• Corporations as per Microsoft should transition
  to dotNET

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Summary

• Less Models
• Ease of use less complexity
• Develop Apps faster with easier deployment
• COM is not dead but dying
• Natural Evolution of Software
• Take technological issues out of programming and
  concentrate on business logic

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HOW DOES IT WORK?
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Presenting the dotNET Application
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OO for all, inheritance, polymorphism,
encapsulation

• Languages, C,VB,C, Cobol, Pascal
• VB now has true inheritance
• VB class can inherit from C class, etc.
• Inherits off System.Object

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Exception Handling

• HRESULTS
• try .. Catch
• On Error Goto
• VB Err Object

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Ex. Exception Handling
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User program Interfaces WinForms, WebForms

• Inheritance
• Code Reuse

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Summary

• Similar programming model for common abstractions
• Common Object Model
• Common Data Types
• Common Virtual Platform

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How to Move Forward
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Preparing for dotNET

• Today Now what should you do? Protocols XML SOAP
• Syntax changes to VB.net
• Timeline for tools and software
• Acronyms
• Links References

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VB Changes
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Timeline

• Visual Studio.NET beta release
• http//msdn.microsoft.com/vstudio/nextgen/beta.asp
  
• Visual Studio.NET coming late 2001
• Blackcomb (NT 6.0) server version .NET coming
  late 2001
• Whistler minor upgrade to Win2000 with dotNET
  runtime coming late 2001

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Acronyms

• API - Application Programmer Interface
• CLR - Common Language Runtime
• CLS - Common Language Specification
• COM - Component Object Model
• CTS - Common Type System
• GC - Garbage Collector
• Microsoft Intermediate Language
• RCW - Runtime Callable Wrapper
• SOAP - Simple Object Access Protocol
• XML - eXtensible Markup Language

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Links References

• http//msdn.microsoft.com/net/
• http//www.gotdotnet.com/
• http//www.develop.com/
• http//www.vbpj.com
• Introducing .NET by James Conrad, Patrick
  Dengler, Brian Francis, Jay Glynn, Burton Harvey,
  Billy Hollis, Rama Ramachandran, John Schenken,
  Scott Short, Chris Ullman, Published by Wrox
  Press Ltd.