week 1 introducing-c

8/7/2019 Week 1 Introducing-c

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Week 1: THE C# LANGUAGE

Chapter 1: Variables and Expressions

What the .NET Framework is and what it contains

How .NET applications work

What C# is and how it relates to the .NET Framework

What tools are available for creating .NET applications

with C#

WHAT IS THE .NET FRAMEWORK?

Microsofts modern software developmentplatform

Supports several programming languages,

including C#, Visual Basic, C++, F#

Programs executed by Common LanguageRuntime (CLR)

Includes a large library of components

(classes) which can be used in programs

Win do ws Pro gra mm in g 1 C ha pt er 1 : I nt ro du ci ng C# S li de 2

Writing Applications Using the .NET

Framework

CIL (Common Intermediate Language code.),

JIT (just-in-time compiler)

MSIL or IL (Microsoft Intermediate Language)

Assemblies Managed Code

Garbage Collection



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Writing Applications Using the .NET

Framework


WHAT IS C#?

Applications You Can Write with C#

Windows applications

Web applications:

Web services:


Visual Studio

Powerful, professional IntegratedDevelopment Environment (IDE)

Integrates compilers, debugger and many

other useful tools for development Can work with many different types of project,

including:

Console (text-based) applications

Windows (GUI) applications

Web applications (ASP.NET)

Class libraries



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Visual Studio

Solution explorer

Toolbox windows

Visual designer

Properties windows


Visual Studio projects

A project contains source code files, settingsand resources for an application

May contain references to class libraries

May contain data used by application

Building a project:

Compiles source files

Copies non-source files to output folder

Creates an assembly in output folder

Building a solution builds all its projects


Project details

References class librariesused by this application

Solution folder contents

Project folder contents

Solution file (.sln) and project file

(.csproj) are created by VS and

contain solution/project

configuration information



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Creating a Visual Studio project

Demo

Win do ws Pro gra mm in g 1 C ha pt er 1: In tro du ci ng C# S li de 10

SUMMARY

Win do ws Pro gra mm in g 1 C ha pt er 1: In tro du ci ng C# S li de 11


Chapter 2: Writing a C#Program

A basic working knowledge of Visual Studio

2010 and Visual C# 2010 Express Edition

How to write a simple console application

How to write a Windows Forms application


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Visual C# 2010 Ultimate

Windows Programming 1 Chapter 2: Writing a C# Program Slide 13

CONSOLE APPLICATIONS


WINDOWS FORMS APPLICATIONS



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The Solution Explorer

W indows Progr amming 1 C ha pter 1 : Introducing C # S lide 1 6

The Properties Window


Code view



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The Error List Window


SUMMARY



Chapter 3:Variables and Expressions

Basic C# syntax

Variables and how to use them

Expressions and how to use them


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BASIC C# SYNTAX

The look and feel of C# code is similar to thatof C++ and Java.

C# compilers ignore additional spacing in

code, whether it results from spaces, carriagereturns, or tab characters (collectively known

as whitespace characters).

Statements

C# is a block-structured language, meaning

statements are part of a blockof code.

Windows Programming 1 Chapter3: Variables and Expressions Slide 22

block

These blocks, which are delimited with curlybrackets ({ and }), may contain any number of

statements, or none at all


comments

Comments can be created using //

Multi-lines comments use /* */

You can use single-line comments that

start with three / symbols instead of two/// A special comment

Comments are ignored by the compiler

Used only for human readers



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The code outlining

You can do this with the #region and#endregion keywords, which define the start

and end of a region of code that can be

expanded and collapsed.


VARIABLES

C# syntax for declaring variables merelyspecifies the type and variable name:

;

int intNumberOfStudents;

Declaration includes

Name, follow Naming Convention Rules

Data Type

Required Value for Constants

Optional Initial Value for Variables


Simple Types



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Simple Types


Simple Types


Using Simple Type Variables



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Variable Naming

The first character of a variable name must beeither a letter, an underscore character (_),

or the atsymbol (@).

Subsequent characters may be letters,underscore characters, or numbers.


String Literals


String Literals

This means that the following strings areequivalent:

"Karli \s string."

"Karli \u0027 s string. @ "A short list:

item 1

item 2

"C:\\Temp\\MyDir\\MyFile.doc

@ "C:\Temp\MyDir\MyFile.doc"



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EXPRESSIONS

Operators can be roughly classified into threecategories:

Unary Act on single operands

BinaryAct on two operands

TernaryAct on three operands


Mathematical Operators




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Manipulating Variables with

Mathematical Operators


Assignment Operators


Operator Precedence



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Namespaces

Namespaces are also used as a means ofcategorizing items in the .NET Framework

C# code, by default, is contained in the global

namespace

Qualified names use period characters (.)between namespace levels

System.Int32


Namespaces


Code in the global namespace, however, must

refer to this name using the classified name

LevelOne.NameOne.

Namespaces

Within a namespace, you can define nested

namespaces, also using the namespace keyword.



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SUMMARY

Windows Programming 1 Chapter 3: Variables and Expressions Slide 43

week 1 introducing-c

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