FEDT VB NET- Creating VB .Net Project

TRINITY INSTITUTE OF PROFESSIONAL STUDIES

Sector – 9, Dwarka Institutional Area, New Delhi-75Affiliated Institution of G.G.S.IP.U, Delhi

Priyanka RattanAssistant Professor(IT)

BCA, FEDT VB .NET,20205

TRINITY INSTITUTE OF PROFESSIONAL STUDIESSector – 9, Dwarka Institutional Area, New Delhi-75

Topics

• Introduction to VB .Net• Creating VB .Net Project in VS 2005• Data types and Operators in VB .Net• Conditions (If Else, Select Case)• Loops (Do While, Do Until, For)• Classes, Objects• Sub routines and Functions


Introduction

• VB .Net is developed by Microsoft• It is Visual Basic for .Net Platform• Ancestor of VB .Net is BASIC• In 1991, Microsoft added visual components

to BASIC and created Visual Basic• After the development of .Net, VB was added

with more set of controls and components and thus evolved a new language VB .Net


Pros and Cons

• Pros– Faster development of programs– Rich set of controls– Object Orientation of language enhances

modularity, readability and maintainability• Cons– Debugging larger programs is difficult, due to the

absence of an effective debugger


Features of VB .Net

• Object Oriented Language• We can drag controls from the tool bar and

drop them on the form and write code for the controls

• Runs on the CLR (Common Language Runtime)• Release of unused objects taken care by the

CLR


Creating VB .Net Project in VS 2005

• Open Visual Studio 2005• Click File -> New -> Project• Choose Language as VB .Net• Choose Type (Either Console Application or

what ever we want)• Give the path under which the project need to

be saved• Click OK


Data types and Operators in VB .Net

• Data types– Integer, string, single, double, boolean, char

• Operators– Arithmetic (+,-,*,/,\,Mod)– Logical (Or, And)– Relational (=,<>,<,<=,>,>=)


If Else

If (Condition)ThenStatements executed if condition is trueElseStatements executed if condition is falseEndIf

We can also have Else If block in If Else statements


Select Case

Select Case varCase 1stmt1 // executed if var = 1Case 2stmt2 // executed if var = 2Case Elsestmt3 // executed if var is other than 1 and 2

End Select


For Loop

For <<var>> = start To end Step <<val>>Statements

Next

EgFor I = 1 To 10 Step 2

msgbox(l)NextHere the values printed will be 1,3,5,7,9


Do While Loop

1. Do While(a<>0) msgbox(a)a = a – 1Loop

2. Do msgbox(a)

a = a – 1 Loop While(a<>0)


Do Until Loop

1. Do Until(a=0) msgbox(a)a = a – 1Loop

2. Do msgbox(l)

a = a – 1 Loop Until(a=0)


Class

• Software structure that is important in Object Oriented Programming

• Has data members and methods• Blue print or proto type for an object• Contains the common properties and methods

of an object• Few examples are Car, Person, Animal


Object

• Instance of a class• Gives Life to a class• Ram is an object belonging to the class Person• Ford is an object belonging to the class Car• Jimmy is an object belonging to the class

Animal


Subroutines and Functions

• Subroutines– Does not return any value– Can have zero or more parameters

• Functions– Always Returns some value– Can have zero or more parameters

Education

FEDT VB NET- Creating VB .Net Project