Copyright © 2001 by iigo, Inc. Introduction To.NET Dallas.NET User Group April 4, 2001.

Copyright © 2001 by iigo, Inc.

Introduction To .NET

Dallas .NET User GroupApril 4, 2001


Casey Chesnut

brains-N-brawn.com


Outline

• Why do we need .NET• What is .NET• When to start .NET


Why .NET

• Present– Windows DNA

• Piecemeal• COM is difficult• DLL Hell deployment• Compiled and Interpreted• Scripting and OO programming models

• Future– Software as a Service


What Is .NET

Next-generation Software Development ‘platform’ for Windows and the Internet

1st platform developed specifically for the Internet


What Is .NET (cont.)

• .NET Framework– Demonstration

• .NET Enterprise Servers• .NET Services


.NET Framework

OS

Common Language Runtime (CLR)[Common Types | Mem Mgt. Lifecycle]

Base Classes[NET | Security | XML | IO | Threading]

Application Programming Models[ASP.NET | Win Forms | Web Services]

Visual Studio .NET


.NET Framework (cont.)

OS




Visual Studio .NET


CLR

• Common Type System• Memory Management• Lifetime Monitor


CLR (cont.)

• Hides COM• Objects for all languages are the same• MSIL• JIT compilers



OS




Visual Studio .NET


Base Classes

• NET• IO• Security• XML• ADO.NET• Threading• Diagnostics• Etc.


Languages

• C#• VB.NET• Visual C++• Jscript• 3rd Party Languages


C#

• ECMA Standardization• Component Language (properties,

events)• No Runtime without .NET• Simplified C++ syntax• Looks like Java (single file for

description and implementation)• Language of choice for Microsoft


VB.NET

• Significant changes from VB6 (inheritance, polymorphism, etc.)

• Strongly typed• No VBScript in ASP.NET• Structured Error Handling• Free Threading• Compatibility Issues• Steep Learning Curve


C++

• Managed vs Unmanaged (default)• Unmanaged is backwards compatible• Managed C++ will not be faster or more

secure than other .NET languages• Updated versions of MFC and ATL• Probably still remain at System level,

although other .NET languages can be there as well now (e.g. Win Services)


Jscript

• Why?


Other Languages

• J++ is gone• COBOL• APL• FORTRAN• PERL• Java ?• Other platforms as well …



OS




Visual Studio .NET


Programming Models• ASP.NET

– Web Forms– Web Services– Mobile .NET Controls

• Win Forms– Controls– Drawing

• Console / Win Services


ASP.NET

• Different Styles– Traditional top-down rendering– Event driven

• Separate presentation and code• Caching• Compiled• Debugging


Web Forms

• Server controls• Multiple browser support• Automatic state management• Scalable• Reliable• Performant


Web Services

•CORNERSTONE OF .NET• Business logic exposed through Internet

standards (XML, SOAP, HTTP)• Data NOT Presentation• Programmatic interfaces to a web site• Language and Platform independent• Next evolution of the Internet


Mobile .NET

• Automatically renders WAP• Device capabilities• Pocket PC and Wireless Web cell phones• Rumors of Palm support• Handles non-standardization of cell

phone industry


Win Forms

• Event Driven Programming Model• Combination of VB Application and J++

WFC Development• Replaces MFC and ATL• Similar model to ASP.NET• Not as feasible as developing .NET on

the server because of runtime


Controls

• Easy to extend• Easy to create• Integrate into VS.NET


Drawing

• GDI+• …


Console

• For traditional ‘Hello World’ programs


Win Services

• No interface• Long running• Language choice


Visual Studio .NET

• One IDE for all languages• One IDE for all programming models• FoxPro is maverick• Self describing .NET components allow

for a true RAD environment• Currently only available for download by

MSDN subscribers


DEMO






.NET Enterprise Servers

• 8 flagship products that are either brand new, reorganized, or totally rewritten

• COM+• XML• DNA and .NET• Released Now


.NET Enterprise Servers

• Application Center 2000• BizTalk Server 2000• Commerce Server 2000• Exchange 2000 Server• SQL Server 2000• Host Integration Server 2000• Internet Security and Acceleration Server 2000• Mobile Information 2001 Server






.NET Services

Software as a Service• ‘Buy vs. Build’ decision moves from

COTS world to Internet space• Islands of applications to ONE BIG APP.• New programming models• New business models• New architectures


.NET Services (cont.)

Microsoft and 3rd Party Vendors• HailStorm• eBay• DNUG



• Collaboration• Security• Revenue• Stateless• Authentication• Competition• Performance• Reliability



XML, SOAP, HTTP

Language implementation and Platform the Web Services are running on does not matter, thus ending the religious wars


When .NET

• Beta 1 – Now (deployable web hosting)• Beta 2 – ~2 months

– Bug fixes– Performance– Interface changes– Deployable

• Release – ~Fall 2001– CE version a couple months later


When .NET (cont.)

• DNA 2000– DNA on .NET Enterprise Servers (all

released)• SOAP Toolkit with VS6 for Web Services

– Will work with .NET, and all other Web Service implementations

• Can wrap .NET around COM/COM+ later• .NET Services (HailStorm-q12k, eBay-?)


Summary• Less plumbing• Less code• Shorter development time• More productive• Better products for customers/end users• Same programming models• Skills transfer• Better developers


Contact

casey chesnutbrains-N-brawn.com

www.DNUG.netwww.iigo.com


Copyright © 2001 by iigo, Inc. Introduction To.NET Dallas.NET User Group April 4, 2001.

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