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Microsoft%20.NET%20Architecture%20

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Title: Microsoft%20.NET%20Architecture%20


1
.NET Framework and Architecture
By Sanjeev Nagaraddi Sonal
Patidar
2
Overview
  • What is Microsoft .NET?
  • New computing platform that simplifies
    application development in the highly distributed
    environment of the Internet.
  • It is a protocol stack and computing model for
    TCPI/IP-based, distributed computing.
  • The .NET Enterprise servers are built for
    interoperability from the ground up, using open
    Web standards such as XML with increased
    scalability and reliability.
  • Primary .NET Components
  • Common Language Runtime (CLR)
  • .NET System Class Libraries
  • ASP.NET used to create XML Web Services

3
.NET Architecture Overview
  • .NET Framework Elements
  • A runtime engine, called the "Common Language
    Runtime" (CLR) that handles memory allocation,
    error trapping, and security features.
  • A set of extensive Framework class libraries,
    written from the ground up that comprise
    practically any functionality you could ask for.
  • Two top-level development "arenas" for web
    applications (ASP.NET) and regular Windows
    applications (Windows Forms).

4
Common Language Runtime (CLR)
  • CLR Architecture
  • .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, at which point the program is
    executed.
  • The CLR architecture provides expansive tool
    support , simpler deployment (end of "DLL Hell"),
    superior scalability, support for multiple
    programming languages and a common data type
    system.

5
Common Type System (CTS)
  • Defines how types are declared, used, and managed
    in the runtime.
  • Establishes a framework that enables
    cross-language integration, type safety, and high
    performance code execution.
  • Provides an object-oriented model that supports
    the complete implementation of many programming
    languages.
  • Defines rules that languages must follow, which
    helps ensure that objects written in different
    languages can interact with each other.

6
Managed Code, Managed Data and Metadata
  • Code that targets the runtime is called managed
    code. It runs under contract of cooperation
    with the runtime. Managed code must supply
    metadata necessary for the runtime to provide its
    services. All code based on MSIL executes as
    managed code.
  • Objects whose lifetime are managed by the
    runtime are called managed data. The runtime
    automatically handles object layout and manages
    references to these objects, releasing them when
    they are no longer being used.
  • Metadata is information that describes every
    element managed by the runtime an assembly,
    loadable file, type, method and so on.

7
.NET Framework Classes
  • System Class Library - collection of reusable
    types that tightly
  • integrate with the runtime.
  • Framework classes include user interfaces
    (Windows Forms (conventional Win32 apps) Web
    Forms (the forms engine for ASP.NET)
  • Server Controls (reusable user interface
    components dwelling server-side)
  • Console Applications as well as program
    interfacesWeb services which are third-party
    applications available over the Internet.

8
.NET Framework Class Library
9
.NET Framework and Tools
Visual Studio .NET
Common Language Runtime
Operating System
10
Assembly
  • An Assembly is a collection of types and
    resources that are built to work together and
    form a logical unit of functionality.
  • .exe, .dll, application(only has one entry
    point)or a
  • library.
  • Can reference other assemblies.
  • These resources, types and references are
    described in
  • a block of data called a manifest.
  • Defines a type boundary, security
    boundary , version
  • boundary.
  • Can be private or shared.

11
Compilation and Execution
Compilation
At installation or the first time each method is
called
12
  • Languages and Platforms Supported by .NET
  • Perl
  • Python
  • COBOL
  • Jscript
  • Eiffel
  • Java
  • Haskell
  • Pascal
  • ML
  • Ada
  • APL
  • C
  • C
  • Visual Basic
  • C
  • SmallTalk
  • Oberon
  • Scheme
  • Mercury
  • Oz
  • RPG
  • Objective Caml
  • Windows XP
  • Windows 2000
  • Windows NT4 SP6a
  • Windows ME/98

13
ASP.NET
  • ASP.NET is a set of technologies in the Microsoft
    .NET
  • framework for building Web Applications and XML
    Web
  • services. ASP.NET pages execute on the server and
    generate
  • markup such as HTML or XML that is sent to a
    browser.
  • ASP.NET pages and XML web services contain a
    server side
  • logic written in VB.NET or C.NET.
  • Uses XML for data storage, configuration and
    manipulation.

14
ASP vs ASP.NET
  • Better Language Support
  • Programmable Controls
  • Event Driven Programming
  • XML Based Components
  • User Authentication, with Accounts and Roles
  • Higher Scalability
  • Increased Performance - Compiled Code
  • Easier Configuration and Deployment
  • Not Fully ASP Compatible

15
XML Web Services
  • A web service is a programmable application
  • component accessible via standard Web
    protocols
  • Web services allow applications to share data
    and can be
  • called across platforms and operating
    systems, regardless
  • of programming language.

16
SOAP (Simple Object Access Protocol)
  • SOAP is an XML based object protocol for the
    exchange of information in a decentralized,
    distributed environment.
  • a. Serialization format for
    request/response semantics
  • using XML and HTTP as transport
  • b. Extensible XML document (Envelope,
  • Encoding Rules, RPC)
  • c. Supports complex and simple types
    (structs, datasets,
  • classes)
  • SCL (SOAP Contract Language)
  • XML document describing the location and
    interfaces
  • a particular service supports

17
.NET Security
  • Role-Based Security
  • a. Principal - abstraction of
    the user and the
  • roles in which it
    belongs.
  • b. Identity - represents the
    user on whose
  • behalf the code is
    executing.
  • Code-Access Security
  • a. Permissions
  • b. Evidence
  • 3. Cryptography
  • a. Confidentiality to protect
    users identity and data.
  • b. Data Integrity to
    protect data from being altered.
  • c. Authentication to
    assure that data originates from
  • a particular party

18
Permissions
  • A permissions object represents a specific
    authorization, such as access to a resource
  • - permission to do something
  • A permission grant is an authorization given to
    an assembly
  • - this code is authorized to do
    something
  • A permission demand is security check for
    corresponding grants
  • - is something permitted , else
    raise an exception
  • - done by stack walking.

19
Pros and Cons of .NET
  • Easy to use tools may increase programmer
    productivity.
  • Strong framework for building rich GUI s
  • Choice of more than 20 languages to work with.
  • Tightly integrated with MS operating system and
    enterprise server software.
  • Built in support for Web services standards.
  • Framework runs only on Windows, restricting
    vendor choice.
  • Users of prior MS tools and technologies face
    potentially steep learning curve.
  • New runtime lacks maturity.
  • Choice of integrated development environments is
    limited
  • Questions persist about scalability and
    transaction capability of the Windows platform

20
Summary
To summarize, .NET is a set of Microsoft
software technologies for connecting your world
of information, people, systems, and devices that
enables unprecedented level of software
integration through the use of XML Web services
via the internet.
21
References
  • .NET Development (MSDN) http//msdn.microsoft.com/
    library/default.asp?url/nhp/Default.asp?contentid
    28000519
  • .NET FAQ http//archive.devx.com/dotnet/resources/
    vsresources-5.asp
  • ASP Vs ASP.NET
  • http//www.w3schools.com/aspnet/aspnet_vsasp.
    asp
  • ASP.NET http//msdn.microsoft.com/library/defau
    lt.asp?url/library/en-us/Dndotnet/html/Techmap_we
    bapps.asp?frametrue

22
Thank You!!
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