Week 1: Introduce ➤ What is the.NET Framework ? CLR, MSIL,IL,FLC Garbage collection Namespace...

C#4.0Week 1: Introduce

➤What is the .NET Framework ? CLR, MSIL,IL,FLC Garbage collection Namespace

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

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WHAT IS THE .NET FRAMEWORK?

Microsoft’s modern software development platform

Programs executed by Common Language Runtime (CLR)

FLC(Framework class library) Includes a large library of components (classes) which can be used in programs

Supports several programming languages, including C#, Visual Basic, C++, J#

Windows Programming 1 Chapter 1: Introducing C# Slide 2

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.NET Framework


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.NET Framework

4

.NET 1.1 (Apr-2003)VS .NET 2003Default: Server 2003

.NET 3.5 (Nov-2007)VS.NET 2008Default: Windows 7

.NET 3.0 (Nov-2006)Default: Windows Vista, Server 2008

.NET 2.0 (Nov-2005)VS.NET 2005

.NET 1.0 (Feb-2002)

.NET 4.0 (2010)VS.NET 2010Default: Windows 7

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Writing Applications Using the .NET Framework

CLR: Common Language Runtime MSIL or IL: Microsoft Intermediate Language JIT: just-In-Time compiler Assemblies Managed Code Garbage Collection


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.NET Framework -CLR

Common Language Runtime Architecture


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MS ILCLR

C++ Compiler

C# Compiler

J# .NET Compiler

CT C#.NET

CT VB.NET

CT C++.NET

CT J#.NET

VB .NET Compiler

1011010

1011010

1011010

Programmer

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Assembly

Managed Modules Chứa IL code để thực thi

Chứa resource, metadata… Portable Executable (PE)

Process assembly (EXE) Library assembly (DLL)

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.NET Assembly

DLL

EXE

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Managed Code

Software that is written using the .NET Framework is called Managed

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Windows(OS khác)

Legacy Software(unmanaged code)

Common Language Runtime

Managed Executable

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Garbage collection

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class myClass{ void Method(){ variable v1; variable v2; do{

…. }}

B

EC

A

D

Managed Heap

A và D sẽ bị xoá do ko còn tham chiếu hay truy cập tới

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Namespaces

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

Qualified names use period characters (.) between namespace levels

Within a namespace, you can define nested namespaces, also using the namespace keyword.

Windows Programming 1 Chapter3: Variables and Expressions Slide 12

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Namespaces


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Namespace Description

System Chứa lớp toán học, chuyển đổi dữ liệu

System.IO Các lớp cho thao tác Input và Output

System.Net Các lớp liên quan đến network protocol

System.Collections Chức các lớp liên quan đến xử lý tập hợp

System.Data Các lớp của ADO.NET

System.Drawing Các lớp thực thi chức năng GUI

System.Threading Các lớp lập trình MultiThread

System.Web Các lớp liên quan đến HTTP protocol

System.Xml Các lớp liên quan XML

Namespace

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Đặc tính lõi: IL, kiểu dữ liệu trong CTS Hỗ trợ Win GUI và control WebForm (ASP.NET) Data Access (ADO.NET) Directory Access File System, registry access Networking and web browsing .NET attributes and reflection WinOS access COM interoperability

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Framework (Base) Class Library FCL/BCL

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Run .NET App from Client

Required MS .NET Framework compatible MS .NET Framework 2.0, 3.5

Install .NET 3.5 Full Redistributable package (dotnetfx35.exe, 197MB)

Windows Vista comes with .NET Framework 3.0

Windows 7 comes with .NET Framework 4.0

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.NET App

.NET App

.NET App

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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


C#4.0Week 1: THE C# LANGUAGE

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 25

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CONSOLE APPLICATIONS


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WINDOWS FORMS APPLICATIONS

MO_BAI1


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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


? ? ?

C#4.0Week 1: THE C# LANGUAGE

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.


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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

Mo_b3


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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 48

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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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SUMMARY

Windows Programming 1 Chapter 3: Variables and Expressions Slide 52

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Week 1: Introduce ➤ What is the.NET Framework ? CLR, MSIL,IL,FLC Garbage collection Namespace...

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