Week 1: THE C# LANGUAGE

C#4.0Week 1: THE C# LANGUAGE

Chapter 1: Variables and Expressions ➤Included in Visual Studio.NET ➤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#

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Included in Visual Studio.NET Visual Basic (VB.Net, VB 7.0) C++ C# (đọc là C Sharp) J# (J Sharp) .NET Framework

Windows Programming 1 Chapter 1: Introducing C# Slide 2

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Install Visual Studio.NET 2010


Chạy file setup.exe ta được hình minh họa (chú ý cài khá lâu có thể hơn 45phút)

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Trên windows XP phải Service pack3

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Trên windows XP phải Service pack3

Chú ý

Nên chọn full

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WHAT IS THE .NET FRAMEWORK? Understanding the .NET Framework

Architecture


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WHAT IS THE .NET FRAMEWORK? Common Language Runtime Architecture


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WHAT IS THE .NET FRAMEWORK? Microsoft’s modern software development

platform Supports several programming languages,

including C#, Visual Basic, C++, J# Programs executed by Common Language

Runtime (CLR) Includes a large library of components

(classes) which can be used in programs


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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


C#Code

C#Compiler

Visual BasicCode

Visual BasicCompiler

COBOLCode

COBOLCompiler

ILJIT

Compiler

NativeCode

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Writing Applications Using the .NET Framework


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WHAT IS C#? Applications You Can Write with C#

Windows applications Web applications: Web services:


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Visual Studio Powerful, professional Integrated

Development 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


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Visual Studio projects A project contains source code files, settings

and 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


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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


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SUMMARY

???Windows Programming 1 Chapter 1: Introducing C# Slide 18


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 20

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CONSOLE APPLICATIONS


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WINDOWS FORMS APPLICATIONS


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The Solution Explorer


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The Properties Window


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Code view


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The Error List Window


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SUMMARY


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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 that

of C++ and Java. C# compilers ignore additional spacing in

code, whether it results from spaces, carriage returns, or tab characters (collectively known as whitespace characters).

Statements C# is a block-structured language, meaning

statements are part of a block of code.

Windows Programming 1 Chapter3: Variables and Expressions Slide 29

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block These blocks, which are delimited with curly

brackets ({ and }), may contain any number of statements, or none at all


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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.


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VARIABLES C# syntax for declaring variables merely

specifies the type and variable name:<type> <name>;int intNumberOfStudents;

Declaration includes Name, follow Naming Convention Rules Data Type Required Value for Constants Optional Initial Value for Variables


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Simple Types


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Using Simple Type Variables


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Variable Naming The first character of a variable name must be

either a letter, an underscore character ( _ ), or the at symbol (@).

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


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String Literals


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String Literals This means that the following strings are

equivalent:"Karli \’s string.""Karli \u0027 s string.“

@ "A short list:item 1item 2“

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


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EXPRESSIONS Operators can be roughly classified into three

categories: ➤ Unary— Act on single operands ➤ Binary—Act on two operands ➤ Ternary—Act on three operands


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Mathematical Operators


C#4.0 Windows Programming 1 Chapter3: Variables and Expressions Slide 43

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Manipulating Variables with Mathematical Operators


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Assignment Operators


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Operator Precedence


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Namespaces Namespaces are also used as a means of

categorizing 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


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Namespaces


Code in the global namespace, however, must refer to this name using the classified name LevelOne.NameOne.

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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 50

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Week 1: THE C# LANGUAGE

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