dot net fundamentals part1

8/10/2019 Dot NET Fundamentals Part1

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.NET Fundamentals

Week 1

November 6, 2003


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Class ScheduleNovember 6, 2003

Introductions and other beginning stuff Review Class Syllabus / Class Goals

Class Dates

Introduction to .NET Introduction to C#

Class Exercise(s)

Homework Assignment


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.Net Fundamentals

CT-186


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Text Books

Applied .NET Framework Programming by

Jeffrey Richter

Programming C# by Jessie Liberty


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Grades

5 take-home assignments (75%)

Final Exam (part of last class) (25%)


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Prerequisites

Fundamental of Programming (CT100)

or

by permission of the instructor.


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Class Goals


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Class Goals

Provide an overview of the .NET Architecture with

Major Components

Programming Languages

ADO.NET

ASP.NET

Web Services

XML Integration


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Class Goals

Understand the .NET Frameworks as an Object Oriented

Strongly Typed Computing Environment


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Class Goals

Work with various .NET Framework components

Common Language Runtime (CLR)

.NET Framework Class Library (FCL)

Assemblies

Strong Names

The Global Assembly Cache (GAC)

Using the GACUTIL


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Class Goals

Introduction to the C# Programming Language


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Course Schedule

Week Topics

1 Introduction to .NET Framework, C#

2 Basic C# Windows Forms Programming

3 Types, Objects, and Classes in .NET4 .NET ADO and XML

5 Exceptions, Intro to ASP.NET, Assemblies

6 Web Services, Final Exam


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Class Dates

Class Dates ( 6, 7, or 8 classes ?)

November 6, 13, 20December 4, 11, 18

November 27, Thanksgiving, no class

Other possible dates: Monday November 24th

Monday December 1st

Monday December 8thor Tuesday December 9th

Monday December 15thor Tuesday December 16th

Or ?


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Effective Learning

First is Doing

Class exercises

Coaching

Helping each other

Homework

Second is Discussing

Class discussions

Asking questions

Sharing ideas and information

Last is Listening


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Learning Environment

Learn somethingWrite some code

Homework Assignments

Write some code

Programming is Fun!


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The only dumb questions

are the ones not asked!


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Time to Address Open Questions

Begin each class with a time for questions

Questions left open from previous classes

Questions emailed to me during the week

Questions triggered by the homework

Or other ???


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Your introductions

Programming background

Operating systems, languages

Any exposure to .NET ? Other courses ?

What do you expect to get out of this course ?


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Please email me the following

Full Name, Nick Name, Student ID # Home Phone / Work Phone


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Email Address (s) [email gives me one]

Your background in computing/programming

Any experience with .NET, other courses, ?

Your objective or goals for this course

Any material you have a special interest in covering?

Any issues or questions that you have?

Additional dates you can attend classes on.


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What Is the Microsoft .NETFramework?

The Microsoft .NET Framework is animportant new component of the Microsoft

Windows family of operating systems. It isthe foundation of the next generation ofWindows-based applications that are easierto build, deploy, and integrate with other

networked systems.


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The .NET I ni tiative

To create rich applications, businesses must offer a

programmatic interface to their business logic services

[which] must be callable remotely using a networklike the Internet. Simply stated, the .NET initiative is

about connecting information, people and devices

- Jeff Richter


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What Is the Microsoft .NETFramework?

The .NET Framework helps softwaredevelopers and systems administrators more

easily build and maintain systems withimprovements toward performance, security,and reliability. Here's how.


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A New Approach to BuildingWindows Software

The .NET Framework simplifies Windowssoftware development. It provides developers

with a single approach to build both desktopapplicationssometimes called smart clientapplicationsand Web-based applications. Italso enables developers to use the same tools

and skills to develop software for a variety ofsystems ranging from handheld smartphonesto large server installations.


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A New Approach to BuildingWindows Software

Software built on the .NET Framework canbe easier to deploy and maintain thanconventional software. Applications can bedesigned to automatically upgradethemselves to the latest version. The .NETFramework can also minimize conflictsbetween applications by helpingincompatible software components coexist.


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Benefits of the .NET Framework

Helps IT professionals better integrateexisting systems with its native support for

Web services. Assists with the deployment of software to

both users and Web servers.

Facilitates the development of software with

improved reliability, scalability,performance, and security.


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Helps developers be moreproductive by:

Making it easier for them to reuse existingcode.

Enabling them to more easily integratecomponents written in any of the more than20 supported programming languages.

Helping them more easily build software for

a wide range of devices using same skillsand tools.


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The Development EnvironmentVisual

Studio.NET

Finally , Visual Studio truly becomes anIntegrated Development Environment, withmulti-language development.

Runs on Windows 2000, NT, XP and the .NETserver family.

Support for building 32 and 64 bit applications

Usual gamut of wizards, debuggers, linkers

Plenty of good documentation

Free .NET Framework SDKcompilers, tools,documentation


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The Development/Runtime platformthe

.NET Framework

The new runtime environment in .NET

Provides a set of base classes for developers to build

on

A unified type system to allow language inter-

operability

This course deals with the fundamentals of

programming this framework


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To summarize, .NET is

An OS platform

The .NET Enterprise Servers.NET building block

services .NET Device Software

The Development Environment VisualStudio.NET

The Development/Runtime platform the .NETFramework


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The .NET F ramework

Think of what device drivers do in terms of

abstracting access by an application

Application

Windows

Scanner

DriverMouse

Driver


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The .NET F ramework

If we abstract the underlying OS in the sameway

Application

.NET Framework

Windows

2000

Windows

XP

FreeBSD

UNIX


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The .NET F ramework

The .NET Framework introduces a layer of

abstraction (and obviously, some overhead) to the OS

as we currently know it. Is this reason enough to move to it ? Lets look at the

state of Windows development without .NET


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The current state of affair s

Win32/C programming Fairly low-level, not object oriented, interoperability

with other languages is hard, memory leaks an issue.

C++/MFC programming

Large language, complex idioms, prone to abuse,interoperability with other languages and other C++

implementations still hard, memory leaks still an issue

Visual Basic programming

Object aware, but not object oriented.

Interop with other languages possible, but ugly.


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The current state of affairs

COM programming

Allows you cross language integration at the binary

level.

Interface based programming encouraged

Fairly complex to understand and set up Deployment is registry based, fairly fragile.

Distributed COM was notoriously hard to set up

because of the security issues involved

A Microsoft-only solution Java programming

Great language, but no cross language integration.

Interpreted byte-code did have performance issues


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The current state of affair s

Into the mix just discussed, throw in JavaScript,ASP, HTML, DHTML

Everything we just talked about has its own

runtime engine/environment, its own set of

libraries and its own set of development tools.

In a highly connected world, our solutions need

to span languages, machines and network

boundaries.


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What the .NET Framework gives us

Consistent programming model A simple OO programming model

Application component isolation

Newer versions can be installed safely Goes a long way in helping improve DLL Hell

Simplified installation model

Xcopy, no registry entries

Uninstalls involve just deleting files/folders

Shared components easier to install than COM

components


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Multi-platform support

The fact that the OS is abstracted away, with codecompiled to an intermediate language makes this

possible

Cross language integration

This is in contrast with COMs cross-languageinteroperation. Types can be used between languages.

This also makes cross language debugging possible.

Automatic memory management

Reduces the incidence of memory leaks . The VisualBasic runtime has done this for sometime, but it is nowavailable to all languages


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Code verifiability

Rich type information gives us the ability to check thatcode is operatingsafely

e.g. Buffer overflows prevented.

Consistent error handling mechanism

Exceptions used instead of error codes andHRESULTS

Exceptions haveto be handledcannot ignore them

Code security

Signing allows the runtime to verify that code has notbeen tampered with.

Code access security associates permissions with code.


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Basic Components of the .NETFramework

The .NET Framework consists of two mainparts:

common language runtime

.NET Framework class library


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The heart of the Framework

The most important elements of the franeworkare:

The Common Language Runtime (CLR)

The Framework Class Libraries (FCL)

OS Services

Common Language Runtime

Framework Class Library

Data XML Base

WinFormsASP.NET


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Common Language Runtime

Provides the common services for .NETFramework applications.

Programs can be written for the commonlanguage runtime in just about every language,

including C, C++, C#, and Microsoft VisualBasic, as well as some older languages suchas Fortran.

The runtime simplifies programming by

assisting with many mundane tasks of writingcode, including memory managementwhichcan be a big generator of bugssecuritymanagement, and error handling.

ommon anguage un me


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ommon anguage un me(CLR)

Locates, loads and runs code written in runtime-

aware languages. Handles object creation, memory management,

making method calls, enforces code security andprovides a process abstraction.

Code that targets the CLR is called managed code,while code that uses the native OS services directlyis called unmanaged code.

Languages that can produce managed code (or.NET programming languages) C#, VB.NET, VC++ with managed extensions, Fujitsu

COBOL.NET, Jscript.NET, Eiffel, Python, Perl


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Managed Module

A Managed Module is a standard windows portable

executable (PE) file that requires the CLR to execute.


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Managed Code

Code executed and managed by the Microsoft .NETFramework, specifically by the .NET Framework's

common language runtime.

Managed code must supply the information necessaryfor the common language runtime to provide services

such as memory management, cross-language

integration, code access security, and automatic

lifetime control of objects.All code based on Microsoft Intermediate Language

executes as managed code.


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.NET Framework Class Library

The library includes prepackaged sets offunctionality that developers can use to more

rapidly extend the capabilities of their ownsoftware. The library includes three keycomponents:

o ASP.NET to help build Web applications and

Web services. o Windows Forms to facilitate smart client user

interface development.

o ADO.NET to help connect applications to

databases.


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Framework Class Library(FCL)

Provides base class libraries available to all .NETprogramming languages.

Access to primitive types, file I/O, graphicalrendering, crypto, GUI, XML support, etc.

Think of the CLR as abstracting the underlying OS (e.g.

Windows), and the FCL as abstracting the OSlibraries. (e.g. Win32)

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