DotNET A Developer

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DotNETA Developers Perspective

• Mike Litzkow
• University of Wisconsin - Madison

2
Microsofts Goals

• Better software development tools
• Better software
• Take over the world
• Desktop
• Servers
• Small Devices

3
What Is DotNET?

• Execution environment above Win32
• Common Language Runtime
• Major Technology Pieces
• DotNET Framework
• C
• ASP.NET
• XML Web Services (passport friends)
• Visual Studio .NET

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Common Language Runtime (CLR)
C, C, VB, JavaScript
Cobol, Fortran, Perl, Python, Eiffel, Pascal,
SmallTalk,

• Supports multiple languages
• Languages interoperate freely
• All code is compiled on target machine
• Compiler aware of actual CPU to be used
• Nothing is interpreted (not even script)
• JIT is default, can compile at install time
• Type safety
• Including array bounds checking
• Garbage collection

(including inheritance)
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But, Will the CLR Last?

• Enterprise development
• language interoperability
• Security
• buffer overrun problems eliminated
• Software reliability
• memory leaks, access errors eliminated
• versioning problems addressed (end of DLL Hell)
• Transition to 64-bit architecture
• no pointers, target machine compilation

Probably Yes
6
Visual Studio.NET
C, C, VB, JavaScript, HTML, XML, Schema,
Bitmaps,

• Multi-language development
• Multi-language debugging
• Syntax coloring and checking
• Intellisense
• Drag n Drop GUI development
• Same GUI tools for multiple languages
• Similar GUI tools for desktop and web

Command line development is available (and free)
DotNET Framework SDK
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DotNET Framework

• Example content
• Object, String, Int, Float,
• I/O
• Windows forms
• Web forms
• XML processing
• Reflection

• Usage model
• Direct use
• Use by inheritance
• Custom toolbox

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C

• Extremely similar to Java
• Differences
• Enumerations
• Properties
• Delegates
• No checked exceptions
• Everything is an object
• Reference types
• Value types

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C - Syntax Examples

• Enumeration
• public enum Direction North, South, East, West
• private Direction direction
• Property
• public Direction Direction
• get return direction
• set
• direction value
• pointTo( direction )

Delegate too complex to show here

• Property usage
• obj.Direction Direction.North

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But, Will C Last?

• Its a good language, but a lot like Java
• MS has control unlike Java
• Heavily used inside MS
• Is C a really important part of DotNET?

Probably Yes
Nah
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ASP.NET

• Server-side code
• runs on CLR
• uses .NET Framework
• All code is compiled (even JavaScript)
• Supports separation of code and HTML
• Easy and efficient DB connectivity
• Drag n drop web forms development
• Forms work across multiple browsers
• Even small devices
• Xcopy deployment
• Debugging, logging, caching,

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But, Will ASP.NET Last?
Probably Yes (CLR on Server, .NET Framework
support)
Not sure about web forms, HTML/Script connection,
DB Connectivty
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XML Web Services

• RPC implemented with XML (SOAP)
• Service description in XML (WSDL)
• Underlying protocol HTTP penetrates firewalls
• Lots of hype and controversy (Passport)

Geneva convention
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But, Will XML Web Services Last?

• Web services are an industry wide initiative
• Lots of questions about compatibility remain

Will be important for B2B commerce
Much more slowly than Microsoft hopes
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DotNET Books

• Introducing Microsoft .NET
• David S. Platt
• C Essentials
• Ben Albahari
• Applied Microsoft .NET Framework Programming
• Jeffery Richter
• Essential .NET The Common Language Runtime
• Don Box
• Programming Microsoft Windows With C
• Charles Petzold

Easy Intro to Whole Platform
Compact reference for C
CLR
CLR
Windows Forms (desktop apps)
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Further Talks

• C
• Delegates
• C vs C performance
• GUI builder
• CLR
• Types
• Metadata
• Versioning
• Security

• ASP.NET
• Web forms
• Database connectivity
• Business logic
• Security

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Contact Info

• Mike Litzkow
• mlitzkow_at_facstaff.wisc.edu
• mike_at_cs.wisc.edu
• 262-6122
• eTEACH Home Page
• http//eteach.engr.wisc.edu