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.NET Overview
BY:
Pinkesh Desai
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What is .NET ??????
Microsoft® .NET is a platform for building, running and experiencing the
next generation of distributed applications. It spans clients, servers and
services and consists of:
A programming model that enables developers to build XML Web
services and applications
A set of XML Web services, such as Microsoft .NET My Services
(formerly code-named 'Hailstorm'), that helps developers deliver a
simple and integrated user experience;
A set of servers, including Windows® 2000, SQL Server™ and
BizTalk™ Server, that integrates, runs, operates and manages XML
Web services and applications
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Abstraction of OS
Effort to run a program on many different
H/W or OS
H/W level achieved through OS
The problem at Operating System level
“A tough computer problem can be solved by
addition of a layer of Abstraction”
Microsoft has done the same by layering
CLR+System calls Library on top of
Operating System
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.NET Framework
.NET Framework
Operating System Operating System
Hardware Hardware Hardware
.NET abstracts operating systems, which are abstracting
hardware.
This means that we can write software to target the CLR – and
that software can run on any operating system or platform
which implements the CLR.
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.NET Framework
CLR (Common language Runtime)
.NET system Class Libraries
ASP+ (Web Forms)
ADO+
C# (C Sharp)
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.NET Framework
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CLR
Heart of the .NET Framework
Provides an environment in which programs can
run
Support many programming languages in a
common manner
.NET applications are compiled to a common
language known as Microsoft Intermediate
Language, or "IL".
The CLR, then, handles compiling the IL to
machine language
IL contains methods, properties and fields related
to the components that are compiled
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Compilation
Great Flexibility
Root of many .NET capability
MSIL – Microsoft Intermediate Language
All languages that work with .NET have compilers
that generate MSIL rather than machine code
MSIL and Metadata will be compiled into machine
code
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Compilation ….
Code Compiler
IL Metadata
JIT Compiler
Execution
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Compilation Example
A developer build an application in VB.NET
Compilation process generates IL code
rather than binary machine code
When user actually runs the application, the
CLR invokes a just-in time (JIT) compiler
This compiler runs on the user’s computer to
compile the IL to machine code
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Metadata
Provides an exact description of the
component that were compiled to IL
COM inability to describe the component
Data is kept in XML so easily accessible and
understandable
Describe component’s interface and so can
be created and called by any language
Eliminates any reliance on the windows
registry
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Key design goals of CLR
Simpler and Faster development
Automatic Handling of memory Management
and process communication
Tool support
Simple and safer deployment
Cross Language integration
Versioning and deployment support
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Simple and Faster development
Less code more reuse
Provides rich set of functionality
Programs in .NET use this functionality and
so less handwritting
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Memory management and
Process communication
Unnecessary to use malloc to set aside
space for an array in C++.
Need to just simple declaration statement
Handles references counting on instantiation
Automatic garbage collection for collecting
objects no longer referenced by the
application
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Tool support
Designed to support multiple languages
Furnishes a rich set of object models that are
useful to tools like designers, wizards ..
Third party tools can be easily incorporated
Cross language integration
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Simple and safer deployment
Deployment is very easy because:
– Applications in .NET are composed of assemblies which
contains IL and metadata as previously stated
– So both code and a complete descriptor of the code are
in one package and self describing.
– So there is no need to register anything in the registry
Application produced in .NET framework can be
easily copied and run using XCOPY
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Cross Language Integration
Enable code written in one language to
integrate with code written in other language
Include cross language inheritance,
exception handling .
This can be done because there is a need to
get the reference of other component through
Metadata and metadata is language
independent
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Versioning Services
CLR supports side by side execution of
multiple versions of the same component.
If one program want to use the component
with particular version that it can get it from
the metadata information
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Class Libraries
XML Web Web
Services Forms Windows
ASP.NET
Forms
Data and XML Classes
Base Framework Classes
Common Language Runtime
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Class Libraries
Base classes: input/output , string manipulation,
security management, network communications,
thread management, text management and other
functions.
Data classes support persistent data management
and include SQL classes for manipulating persistent
data stores through a standard SQL interface.
XML classes enable XML data manipulation and
XML searching and translations.
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Class Libraries…
Web Forms include classes that enable you
to rapidly develop web GUI applications.
Windows Forms support a set of classes that
allow you to develop Windows GUI
applications – facilitating drag-and-drop GUI
development and providing a common,
consistent development interface across all
languages supported by the .NET Framework
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Win Forms
.NET provides a single, unified way to
create user interfaces outside of a
browser environment - Win Forms
Win Forms provide a language-neutral
way to create forms, add controls, and
respond to the user's actions
Win Forms are not based on ActiveX
They are instances of classes in the
.NET system class library.
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References
Introducing .NET by Wrox Press
Introducing .NET by Microsoft Press by David
Platter
http://www.gotdotnet.com
http://www.msdn.microsoft.com/net
http://www.asp.net
Visual Studio.NET:
ttp://www.msdn.microsoft.net/vstudio/nextgen/getst
arted.asp
Tool for java developers
http://www.msdn.microsoft.com/visualj/
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Thank You.
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