FEDT VB NET- Creating VB .Net Project

FEDT VB NET- Creating VB .Net Project

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  TRINITY INSTITUTE OFPROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 Affiliated Institution of G.G.S.IP.U, Delhi Priyanka Rattan Assistant Professor(IT) BCA, FEDT VB .NET,20205
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  TRINITY INSTITUTE OFPROFESSIONAL STUDIES Sector – 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
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  TRINITY INSTITUTE OFPROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 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
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  TRINITY INSTITUTE OFPROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 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
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  TRINITY INSTITUTE OFPROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 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
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  TRINITY INSTITUTE OFPROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 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
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  TRINITY INSTITUTE OFPROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 Data types and Operators in VB .Net • Data types – Integer, string, single, double, boolean, char • Operators – Arithmetic (+,-,*,/,,Mod) – Logical (Or, And) – Relational (=,<>,<,<=,>,>=)
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  TRINITY INSTITUTE OFPROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 If Else If (Condition) Then Statements executed if condition is true Else Statements executed if condition is false EndIf We can also have Else If block in If Else statements
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  TRINITY INSTITUTE OFPROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 Select Case Select Case var Case 1 stmt1// executed if var = 1 Case 2 stmt2// executed if var = 2 Case Else stmt3// executed if var is other than 1 and 2 End Select
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  TRINITY INSTITUTE OFPROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 For Loop For <<var>> = start To end Step <<val>> Statements Next Eg For I = 1 To 10 Step 2 msgbox(l) Next Here the values printed will be 1,3,5,7,9
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  TRINITY INSTITUTE OFPROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 Do While Loop 1. Do While(a<>0) msgbox(a) a = a – 1 Loop 2. Do msgbox(a) a = a – 1 Loop While(a<>0)
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  TRINITY INSTITUTE OFPROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 Do Until Loop 1. Do Until(a=0) msgbox(a) a = a – 1 Loop 2. Do msgbox(l) a = a – 1 Loop Until(a=0)
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  TRINITY INSTITUTE OFPROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 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
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  TRINITY INSTITUTE OFPROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 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
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  TRINITY INSTITUTE OFPROFESSIONAL STUDIES Sector – 9, Dwarka Institutional Area, New Delhi-75 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