DotNet

1
DotNet

• Michelle Johnston, Firebird Services Ltd

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What is Dot Net

• Aims to simplify web development
• Language independent CLR (Common Language
  Runtime)
• Common set of services regardless of language
• Interoperability between technologies
• XML/SOAP is at its heart

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What is Dot Net

• .Net Framework
• .Net Enterprise Servers
• Com
• Many languages (VB, C, C, Java, J etc.)
  access the same CLR

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Common Services (Building Block)

• Available to all users of CLR
• Identity (Passport)
• Notification / Messaging
• Personalization (my)
• Schematized storage (ADO.Net)
• Calendar
• Directory (Active Directory like LDAP)
• Search
• Software Delivery

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.Net Enterprise Servers

• SQL Server 2000
• Biztalk Server 2000
• Host Integration Server 2000
• Exchange 2000 Enterprise Server
• Internet Security and Acceleration Server 2000
  (ISA)
• Commerce Server 2000

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Fully object oriented

• No wrappers
• No scripting objects together
• Fully supports..
• Inheritance
• Encapsulation
• Methods
• Properties
• Events
• Constructors

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.Net sits on top of..

• Windows API
• Visual Basic Forms
• ASP
• MFC/ATL

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.Net is not hidden

• Programmers can see all that makes up .Net
• Can extend .Net classes (unless sealed)
• Can implement cross-language inheritance
• Code is organized into hierarchical namespaces
  and classes
• Everything is an object

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Languages

• Visual Basic .Net substantial language
  improvements (overloading, structured exception
  handling, stricter type checking)
• C - designed for .Net, component oriented
  language, can be embedded in ASP.Net pages
• C - managed extensions to C, including
  garbage handling
• J.Net for Java developers, takes full
  advantage of the .Net framework, but is NOT
  OPEN!!
• Many other languages are coming on board COBOL,
  Pascal and Smalltalk amongst others

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Class Libraries

• .Net framework class libraries
• System
• System.Net
• System.IO
• System.Globalization
• System.Threading
• System.Security

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ADO .Net

• System.Data class library
• DataSet
• DataRow
• DataTable
• DataView
• Disconnected data sets are supported
• Rich XML support

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XML Support

• System.Xml namespace
• XML Parser and Writer, both W3C compliant
• System.Xml.Xsl for transformations
• XPath data visual navigation in XML
• System.Xml.Serialization allows you to move back
  and forth between objects and an XML
  representation

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Web Services

• Web service is a reusable component that is
  available across the internet
• System.web / System.Web.Services for web services
• Description
• Discovery
• Protocols

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Web Forms

• System.Web.UI namespace
• Two types of controls
• HTML Controls (direct mapping to HTML controls)
• Web Controls (richer, e.g a data grid)

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Hints and Tips in .Net

• Use a control to do anything!
• There is always one that does it already!
• E.g. Charting objects from Software Artisans,
  .Net Resource kit has a free standard one, there
  are many others
• E.g. File Management objects as above

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Bits and Bobs

• Saving Word, Excel, Powerpoint as html/xml files
• Select from an Excel file just as you can a
  database