net introduction ppt

8/12/2019 .NET INTRODUCTION PPT

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INTRODUTION TO .NET

CLASS & OBJECTABSTRACT CLASS


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Microsoft visual studio .net is a technology

and it contains controls, solution explorer and

properties.Front end and back end communication is a

package.

It has the ability to quick building and

intelligent system.


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1990next generation windows services

2000 - .NET framework(rename)


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It is a collection of services and classes.

It is a underlying layer between operating

system and application.

Do not support pointer.


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1.0 - .NET framework

1.1 - .NET 2003

2.0 - .NET 2003

3.0.NET 2005

3.5.NET 2008

4.0 - .NET 2010

4.5- .NET 2012


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Windows application

Web applicationConsole application


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Desktop application

Forms are like vb

It contains controls


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Asp.net

To create dynamic web page

Server-side programming

GUI-graphical user interface


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Character-user-interface.

Command promt.


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It has the environment called managed

code.

Every language has runtime, instead of

that .net has CLR.

It is used to manage the execution of the

code.


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CTS(common type system)

CLS(common language specification)

JIT(just in time)


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It is used for communicate with other

languages.

In vb, having int and in c++ having long, in

one case they are not compatible with

each other in that case cts plays role with

Using System.int32.


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It defines how data types are declared,

used and managed in runtime.

It has a set of features have in common.

It is a subset of CTS


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JIT compiler is used to convert machine

code to native code.

CLR supplies a JIT compiler for each

supported cpu architecture , so developers

can write set of MSIL can be JIT compiled

and run on computers.


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Reusable of code.

Object oriented nature at a runtime.

With the help of namespace class library is

executed.


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Logical group of related classes and

interfaces.

It is used to reduce the naming confusions.

IMPORTSis the keyword for vb.net.

Using is the keyword for c#.


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Dim a as integer

Dim - statement

A - variable

As - clause

Integer - datatype


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Class are user defined data type.

Its contains collection of object.

It like built in types of a program language.

A group of object same behaviors.


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Object are basic real time entities in an

object oriented.

It is anything that really exist the world.It is a instant of class.


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ACESS SPECIFIER CLASS USERDEFINE

CLASSNAME

END CLASS

ACCESS SPECIFIER CLASS CLASSNAME

DIM OBJECTNAME AS NEW CLASSNAME()

END CLASS


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Public Class Form1

Dim d As New demo()

Private Sub Button1_Click(ByVal sender As S

Dim a, b As Integer

a = d.sum(3, 4)

b = d.subtract(4, 2)

TextBox1.Text = a

TextBox2.Text = b

End Sub


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Public MustInherit Class sample

Public MustOverride Function sum(ByVal a As Integer, ByVal b As

Integer)

Public MustOverride Function subtract(ByVal a As Integer, ByVal b As

Integer)End Class

Public Class demo

Inherits sample

Public Overrides Function sum(ByVal a As Integer, ByVal b As Integer)

As ObjectReturn a + b

End Function

Public Overrides Function subtract(ByVal a As Integer, ByVal b As

Integer) As Object

Return a - bEnd Function

End Class


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net introduction ppt

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