Dot Net Framework Session 01

8/14/2019 Dot Net Framework Session 01

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.NET Framework-Application Development Simplified

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With the change in technology, the approach to application

development has changed completely. Earlier, the

developers had to learn different programming languages to

develop different types of applications. This was a

complicated task.

The .NET Framework has simplified this task by providing a

common platform that enables the developers to develop

different types of applications easily and quickly.

Rationale




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In this session, you will learnabout the .NET Framework

and how it helps in rapid

application development.

Objective




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What is the .NET

Framework?

Introducing the .NET Framework




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The .NET Framework is a:

Language-independent software development environment.

Platform designed for developing interoperable applications.

The objective of the .NET Framework is to bring various

programming languages and services together.

Introducing the .NET Framework (Contd.)




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The following figure illustrates the .NET Enterprise vision.





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Using the .NET Framework, you can create applications

that are:

Robust: Applications that remain stable in extreme situations,

such as erroneous inputs

Scalable: Applications that can be extended

Distributed: Applications whose components run on different

computers over a network

The .NET Framework has various components.





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What are the components

of the .NET Framework?

Components of the .NET Framework




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Components of the .NET Framework (Contd.)

The following figure shows the architecture of the .NET

Framework.

Common Language RuntimeCommon Language Runtime

Base Class LibraryBase Class Library

Common Language Specification (CLS)Common Language Specification (CLS)

C++C++ C#C# VB.NETVB.NET J#J# ……V

i s u al S t u d i o

.NE T

V i s u al S t u d i o

.NE T




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Let us discuss the components

of the .NET Framework.





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The CLR:

Manages code execution at run time.

Performs functions such as code compilation and garbage

collection.





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The Base Class Library:

Is a standard library available to all languages using the .NET

Framework.

Includes a large number of common functions, such as file

reading and writing, graphic rendering, and database

interaction.







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Programming languages:

Any .NET supported programming language can be used.




C++C++ C#C# VB.NETVB.NET J#J# ……




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CLS:

Is a set of rules that enables an object or application to interact

with the objects or applications of other languages.




Common Language Specification (CLS)Common Language Specification (CLS)

C++C++ C#C# VB.NETVB.NET J#J# ……V i s u al S t u

d i o

.NE T

V i s u al S t u

d i o

.NE T




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Let us discuss the main

components in detail.





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Common Language Runtime (CLR):

Is the environment where all programs using .NET

technologies are executed.

Provides services such as code compilation, memory

allocation, and garbage collection for managed code, which is

represented in the form of Intermediate Language (IL).

IL:

Is a low level language that the CLR understands.

Has to be converted into machine language for execution.

Common Language Runtime




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Just-In-TimeCompiler

IL is converted

into machine

language

by the

Just-In-Time

compiler

Common Language Runtime (Contd.)




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CLR consists of a set of common rules known as CLS that

are followed by all the .NET Framework supported

languages.





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Common Language Runtime

Just-In-TimeCompiler

Common LanguageSpecification

CLS

enables an

object or an

application

to interact

with theobjects or

applications

of other

languages.





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The following figure shows the code compilation andexecution process.

Compilation Process

Execution Process

JITCompiler

NativeCode

ILILCode

Metadata

SourceCode

LanguageCompiler

Known asAssembly(.EXE or .DLL file)

Known asAssembly(.EXE or .DLL file)





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During execution, CLR performs the following tasks:

Assembly Loading and namespaces identification

JIT compilation

Garbage collection





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Let us understand the .NET

Framework Base Class Library.

Base Class Library




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The .NET Framework Base Class Library:

Works with any .NET language, such as VB.NET, VC++ .NET,

and VC# .NET.

Provides classes that can be used in the code to accomplish a

range of common programming tasks, such as file access and

database connectivity.

Comprises namespaces, which are contained within

assemblies.

Base Class Library (Contd.)




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Assembly

.NET Framework Base Class Library

Namespaces are

stored in

assemblies andhelp you to create

logical groups of

related classes

and interfaces,

which can be used

by any language

targeting the .NET

Framework.

Namespaces





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Assembly

.NET Framework Base Class Library

An assembly is a

single deployable

unit that contains

all the informationabout the

implementation of

classes,

structures, and

interfaces.





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The .NET Framework enables you to create the following

types of applications:

Console-based

Windows-based

Web-based

Types of Applications




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Windows-Based

Applications

Console-based

applications are

generally used

in situations

where minimaluser interaction

is required.

Web-BasedApplication

s

Console-Based

Application

s

Types of .NET Applications

Types of Applications (Contd.)




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Windows-based

applications are

created when

user interaction

is required.


Windows-Based

Applications


s

Console-Based

Application

s





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Windows-Based

Applications


s

Console-Based

Application

s


Web-based

applications are

created when theapplication needs to

be accessed

anywhere, anytime,

and across

platforms.





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Some advantages offered by the .NET Framework are:

Consistent programming model

Multi-platform applications

Multi-language integration

Automatic resource managementAttribute-based programming

Ease of deployment

Advantages of the .NET Framework




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Visual Studio .NET:

Is a development tool.

Contains the following productivity and debugging features:

Supports managed and unmanaged applications

Supports languages such as C#, C++, VB.NET, and J#

Contains many useful tools and wizardsProvides Windows Forms Designer

Provides ASP.NET Web Forms Designer

Provides Web Services support

Provides SQL Server integration with ADO.NET and XML

Provides the same tool for all languages and platforms.

Using Visual Studio .NET




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You can use Visual Studio .NET to:

Write code.

Design user interface.

Study documentation.

Debug, test, and deploy applications.

Using Visual Studio .NET (Contd.)




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The following figure shows the main elements of the Visual

Studio .NET IDE.Windows Form Designer Menu Bar

Solution

Explorer

Window

Output

Window

Properties

Window

ToolboxWindow





The main elements of the Visual Studio .NET IDE are:

Windows Forms Designer window

Solution Explorer window

Properties window

Toolbox windowOutput window

Code and Text Editor window


Documents

Dot Net Framework Session 01