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VB.Net Mod1.pptx

This document provides an overview of Visual Basic .NET, including an introduction to the .NET framework, Visual Studio integrated development environment, VB.NET language basics like variables, data types, operators, arrays, and enumerations. It concludes with details on creating a simple "Hello World" console application in VB.NET.

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Visual Basic .Net G e t t i n g S t a r t e d
Course Overview Introduction .Net Overview What’s VB Variables,Operators Flow Controls / Exceptions Classes & Objects Types & Assemblies Collections & File System
Module Overview  What is .Net?  VB in .net Framework  Getting started with VB  Visual Studio IDE tour  First Program – Hello world!  Compilation & Execution  Variables and Operators  Data Types  Arrays & Enums  Summary
.Net Framework Base Class Library Common Language Specification Common Language Runtime ADO.NET: Data and XML VB C++ C# Visual Studio.NET ASP.NET: Web Services And Web Forms JScript … Windows forms
Common Language Runtime Base Class Library Common Language Specification Common Language Runtime ADO.NET: Data and XML VB C++ C# Visual Studio.NET ASP.NET: Web Services and Web Forms JScript … Windows Forms
 Language Interoperability  Common Classes for all Languages  Common Types for all Languages  Runtime Controls Compilation to Machine Code Assemblies  Application Domains Common Language Runtime
The .NET Framework  Simplified development  XCOPY deployment  Scalability  Rich Web clients and safe Web hosting  Potentially multi-platform  Multiple languages (cross inheritance)  Increases productivity  Robust and secure execution environmentwq
CLR Execution Model VB Source code Compiler C++ C# Compiler Compiler Assembly IL Code Assembly IL Code Assembly IL Code Operating System Services Common Language Runtime JIT Compiler Native Code Managed code Unmanaged Component
The .NET Framework .NET Framework Services Base Class Library Common Language Specification Common Language Runtime ADO.NET: Data and XML VB C++ C# Visual Studio.NET ASP.NET: Web Services and Web Forms JScript … Windows Forms
 ASP.NET  Separation of code and presentation  Compiled  Web Forms  Web Services  Windows® Forms  Framework for building rich clients  ADO.NET, Evolution of ADO  New objects (e.g., DataSets)  XML support throughout The .NET Framework .NET Framework Services
VB.net – What it is?  A language to create .Net components  An evolution of classic Visual Basic  Create application, services, and reusable libraries  Visual basic command line compiler  Transforms VB code to MSIL  Produces an assembly (.dll, .exe)
Visual Studio - IDE  An Integrated Development Environment  Edit VB, C#, JS, Css, Html files  Compile and Execute programs  Debugging tools  Testing evironment
Visual Studio – Solution Explorer  Will contain at least one project  Contains one or more source code files  Each project produces an assembly  Projects organized under a solution  Manage multiple applications or libraries
Data Types Name Description Int32 (or int) 32 bit integer Int64 (or long) 64 bit integer Boolean (or bool) true or false Float (or float) Single precision floating point Double (or double) Double precision floating point Decimal (or decimal) Fixed precision (financial) DateTime An instant in time (to 100 ns) String (or string) Text (as Unicode characters)
Variables  Variables hold a value  Use the Dim keyword to create a variable  Variables always have a type  Can optionally assign a value at declaration
Type Inference  Visual Basic can infer type of variable  from their value  Must assign at value at declaration  for inference to work
Statements  A statement is a line of code  Statements end at the end of a line  Long statements can be divided using  the underscore character
Operators  Specify an operation to perform on one or more variables  Mathematical operators ( + , - , * , /, , Mod )  Relational operators ( < , > , <= , >= )  Equality operators (=, <>)  Conditional operators (And, Or)  Assignment operators (=, +=, -=, *=, /=)  String concatenation (&)
Arrays  A variable that can hold multiple values of the same type  Index of first item is 0  Can have multi-dimensional arrays
Enumerations  An Enum creates a type  A set of named constants  A numeric value is associated with each constant
First Program – Hello World  Create a console app – vb module  Inside Sub Main()  Console.WriteLine(“Hello World”) Lets see in action - Demo
Summary  What is .Net?  VB in .net Framework  Getting started with VB  Visual Studio IDE tour  First Program – Hello world!  Compilation & Execution  Variables and Operators  Data Types  Arrays & Enums  Summary