Dot Net Framework

.Net Framework

Introduction to .NET The .NET Platform Clients

Web Form Protocols: HTTP, HTML, XML, SOAP, UDDI

Your Internal Web Service

Applications

Web Service

.NET Framework Windows and Linux and…

.NET Foundation Web Services

Third-Party Web Services

Tools: Visual Studio.NET, Notepad

.NET Enterprise Servers

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The .NET Framework What Is the .NET Framework? •

A set of technologies for developing and using components to create: – web forms – web services – windows applications

•

Supports the software lifecycle – – – –

development debugging deployment maintenance

The .NET Framework The .NET Framework and Visual Studio.NET VB

C++

C#

JScript

…

ASP.NET: Web Services and Web Forms

Windows Forms

ADO.NET: Data and XML .NET Framework Base Classes

Visual Studio.NET

Common Language Specification

Common Language Runtime

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Common Language Runtime Program written in any .NET supported language C#, VB.NET, etc. compile

Intermediate Language (IL) - like Java bytecode (.exe or .dll)

Common Language Runtime Loads and executes code, garbage collects etc

Common Language Runtime Compilation

Source Code

Assembly

Compiler C++, C#, VB or any .NET language

csc.exe or vbc.exe

DLL or EXE

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Intermediate Language (IL) • .NET languages are not compiled to machine code. They are compiled to an Intermediate Language (IL). • CLR accepts the IL code and recompiles it to machine code. The recompilation is just-in-time (JIT) meaning it is done as soon as a function or subroutine is called. • The JIT code stays in memory for subsequent calls. In cases where there is not enough memory it is discarded thus making JIT process interpretive.

Common Language Runtime Assemblies •

Assembly – logical unit of deployment – contains manifest, metadata, MSIL and resources

•

Manifest – metadata about the components in an assembly (version, types, dependencies, etc.)

•

Type metadata – completely describes all types defined in an assembly: properties, methods, arguments, return values, attributes, base classes, …

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Common Language Runtime Assemblies • Microsoft Intermediate Language – MSIL or IL – all languages compile to IL (managed code) – IL is always compiled to native code before being executed

• Resources – data, images, audio, etc.

Common Language Runtime Execution Model Source code

MSIL Ngen

Native code

VB

C#

C++

Compiler

Compiler

Compiler

Assembly

Assembly

Assembly

Common Language Runtime JIT Compiler

Managed Code CLR Services

Managed CLR Code

Managed Code

Unmanaged Code

Operating System Services

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Common Language Runtime Services • Code management • Conversion of MSIL to native code • Loading and execution of managed code • Creation and management of metadata • Verification of type safety • Insertion and execution of security checks • Memory management and isolation

• Garbage collection • Handling exceptions across languages • Interoperation between .NET Framework objects and COM objects and Win32 DLLs • Automation of object layout for late binding • Developer services (profiling, debugging, etc.)

Windows Forms • Framework for building rich clients • Built upon .NET Framework, languages • Rapid Application Development (RAD) • Visual inheritance • Anchoring and docking • Rich set of controls

• Extensible controls • Data-aware • Easily hooked into Web Services • ActiveX support • Licensing support • Printing support • Advanced graphics

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Web Forms • Built with ASP.NET – logical evolution of ASP – similar development model: edit the page and go

• Requires less code – actually more code but less programming

• New programming model – – – –

event-driven/server-side controls rich controls (e.g. data grid, validation) data binding controls generate browser-specific code

Web Forms • Allows separation of UI and business logic – separation of concerns is a good thing – cleaner, more maintainable code

• Uses .NET languages – not just scripting

• Easy to use components • Simple configuration (XML-based)

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More Resources .NET – http://www.microsoft.com/net/ – http://msdn.microsoft.com/net/ – http://www.gotdotnet.com – msnews.microsoft.com news server • microsoft.public.dotnet.general newsgroup

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