Overview of a .net framework: versioning and deployment, Memory management, Cross- Language integration, Metadata, IL diassembler, The IDE components like IDE menu, Toolbox, Solution explorer, Property window, Output window, Task list window. Namespace and the imports keyword, the AssemblyInfo.vb file

1. JIGAR JOBANPUTRA
SRK INSTITUTE OF MANAGEMENT
AND COMPUTER EDUCATION
UNIT-1
INTRODUCTION TO
VB.NET
JIGAR JOBANPUTRA (J.J.)

2. › C Language allows you the concept of
the procedural programming
language.
› Execution starts with the first line of the
main() function and then follows the
predefined path through the
application calling procedures as
needed.
› In the event driven application the
code doesn’t follow the predefined
path.
EVENT-DRIVEN MODEL
JIGAR JOBANPUTRA (J.J.)

3. › Everything is depended upon an event.
› Event driven programming is associated
with properties, methods and events.
› In daily routine we are using so many
objects like TV , ICE-CREAM , MOBILE ,
BIKE etc.
› Each and every object has properties ,
methods and events
› For e.g. cost of laptop, company , color
, size , RAM, HARD DISK are properties of
laptop.
Cont…
JIGAR JOBANPUTRA (J.J.)

4. › Property means characteristics of
anything
› Each and every object identified by its
characteristics.
› Events are reaction of any action
› Methods are something like function
doing something.
Cont…
JIGAR JOBANPUTRA (J.J.)

5. › Visual studio .net is complete package
of development tools for developing
web applications, desktop application,
mobile applications etc.
› Visual studio .net supports 60 languages
for developing software. Some
common languages are visual
basic.net, visual c++, c# .Net, J#
.Net.
What is visual studio.net?
JIGAR JOBANPUTRA (J.J.)

6. › “Microsoft .NET is based on the .NET
Framework, which consists of two major
components: the Common Language
Runtime (CLR) and an extensive set of
Framework Class Libraries (FCL). The CLR
defines a common programming
model and a standard type system for
cross-platform, multi-language
development.”
Cont…
JIGAR JOBANPUTRA (J.J.)

7. › .NET supports VB, C# (C-sharp), C++, J# (Java 1.2), etc.
CONT…
code.vb code.cs code.cp
p
...
Development Tools
app.exe
FCL
JIGAR JOBANPUTRA (J.J.)

8. › Compiled .NET apps run on any supported
platform:
.NET is cross-platform
APP.exe
?
Win64 Win32
(XP,2K,98)
WinCE
JIGAR JOBANPUTRA (J.J.)

9. › Cross-platform execution realized in two
ways:
1.apps are written against Framework Class
Library (FCL), not underlying OS
2.compilers generate generic assembly
language which must be executed by the
Common Language Runtime (CLR)
How is cross-platform
achieved?
JIGAR JOBANPUTRA (J.J.)

10. › Framework Class Library
– 1000's of predefined classes
– common subset across all platforms &
languages
– networking, database access, XML
processing, GUI, Web, etc.
› Goal?
– FCL is a portable operating system
FCL
JIGAR JOBANPUTRA (J.J.)

11. › RICH SET OF CLASSES: -
– Visual studio.net contains hundreds of
classes and namespaces that providing
variety of functionality in application
– For example to work with database we
need to include system.data namespace
FEATURES OF .NET
JIGAR JOBANPUTRA (J.J.)

12. › Object oriented programming system
– Visual studio .NET provides a fully object
oriented environment.
– Visual studio .NET supports oops concepts
Cont…
JIGAR JOBANPUTRA (J.J.)

13. › In- built memory management:
– Visual studio .NET supports handling memory
on its own.
– The garbage collector take responsibility for
freeing up unused objects at regular
intervals.
Cont…
JIGAR JOBANPUTRA (J.J.)

14. › Multi – language and Multi-device support
– Visual studio .NET supports multiple language
– This means that if your friend is good in c# and
you are comfortable with VB.
– So you can work on the same project using
different languages.
– The beauty of multi language supports lies in the
fact that even though the syntax of each
language is different the basic environment of
developing software is same.
– Visual studio .NET supports multi-device
Cont…
JIGAR JOBANPUTRA (J.J.)

15. › Faster and easy development of web
application-
– ASP.NET is useful for developing dynamic
and database related web applications
– ASP.NET contains rich and faster
development controls for web applications
Cont…
JIGAR JOBANPUTRA (J.J.)

16. › XML Supports-
– Visual studio .NET supports for writing ,
manipulation and transforming XML
DOCUMETNS
Cont…
JIGAR JOBANPUTRA (J.J.)

17. › Ease of development and
configuration
– Deploying windows application especially
that use COM components have always
been a tedious task since .NET does not
require any registration as such, much of
the deployment is simplified
Cont…
JIGAR JOBANPUTRA (J.J.)

18. › How .NET works?
HOW .NET WORKS?
Operating System + Hardware
.NET Framework
.NET Application
JIGAR JOBANPUTRA (J.J.)

19. Base Class Library
Common Language Specification
Common Language Runtime
ADO.NET: Data and XML
VB VC++ VC#
VisualStudio.NET
ASP.NET: Web Services
and Web Forms
JScript …
Windows
Forms
Framework, Languages, And Tools
JIGAR JOBANPUTRA (J.J.)

20. › The .NET framework exposes numerous classes to
the developer. These classes allow the
development of rich client applications and Web
based applications alike. In the above slide these
classes have been divided into 4 areas.
› ASP.NET provides the core Web infrastructure such
as Web Forms for UI based development and Web
Services for programmatic interface development,
› User interface development on the Windows
platform can be done using Windows Forms
› ADO.NET and XML provide the functionality for
data access.
› Finally, the core base classes provide infrastructure
services such as security, transaction management
etc.
Cont…
JIGAR JOBANPUTRA (J.J.)

21. •Common Language Runtime
• Common, secure execution environment.
• It is the execution engine for .NET framework
• It is the heart and backbone of the .NET
• It provides an infrastructure for running
program and allows them to communicate
with other parts of the .NET framework
• It provides the following facilities
• Code loading and execution
• Application memory , isolation
• Verification of type safety
• Conversion to IL to native code
CONT…
JIGAR JOBANPUTRA (J.J.)

22. › Access to metadata
› Managing memory for managed objects
› Enforcement of code access security
› Exception handling
Cont…
JIGAR JOBANPUTRA (J.J.)

23. › CTS allows programs written in different
programming language to easily share
information
› A class written in C# should be
equivalent to a class written in VB.NET
› Languages must agree on the
meanings of these concepts before
they can integrate with each other.
What is Common Type System?
JIGAR JOBANPUTRA (J.J.)

24. › CTS provides cross language integration
› The Common type system supports two
general categories of types:
– Value types
– Reference types
It store directly data on stack. In-built data
type.
e.g. dim a as integer
store a reference to the values memory
address, and allocate on heap.
Cont…
JIGAR JOBANPUTRA (J.J.)

25. › CLS includes basic language features
needed by almost all the applications.
› It serves as a guide for library writers
and compiler writers
› The common language specifications is
a subset of the common type system
› The common language specification is
also important to application
developers who are writing code that
will be used by other developers.
What is CLS(common language
specifications)?
JIGAR JOBANPUTRA (J.J.)

26. › Meta data stored within assembly
› .NET records information about
compiled classes as metadata
› Meta data means data about data
› A .NET language compiler will generate
the metadata and store this is in
assembly.
› Meta data is nothing but a description
of every namespace, class , method ,
property etc.
What is metadata?
JIGAR JOBANPUTRA (J.J.)

27. › CLR uses this metadata to
– Locate classes
– Load classes
– Generate native code
– Provide security
Cont..
JIGAR JOBANPUTRA (J.J.)

28. › As mentioned above .NET framework
class library is collection of namespaces
› Namespace is logical naming scheme
for types that have related
functionality.
› Namespace means nothing but a
logical container or partition
› It is like drives of the computer
› The drives are logical partitions of hard
disk c: d: e: f: are used for unique
identification for particular file.
What is namespace?
JIGAR JOBANPUTRA (J.J.)

29. › System- contains fundamental classes
and base classes
› System.io- classes for reading and
writing data in file
› System.xml- classes work with xml
› System.windows.forms- contains classes
for window-based applications
› System.data- contains classes for the
database connection
Common namespaces
JIGAR JOBANPUTRA (J.J.)

30. › An assembly is the basic building block
of .NET application
› The assemblyinfo.vb file contains
information about the assembly its
version number, dependencies,
product , copyright , trademark,
description etc.
What is Assemblyinfo.vb file?
JIGAR JOBANPUTRA (J.J.)

31. Thank you
JIGAR JOBANPUTRA (J.J.)