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Introducing the .NET Framework and C# Programming

Learn about the .NET Framework and how it relates to programming in C#. Explore the concept of Common Language Runtime (CLR), Microsoft Intermediate Language (MSIL), and the Framework Class Library (FCL). Discover the benefits of using Visual Studio for C# development.

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Introducing the .NET Framework and C# Programming

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  1. Week 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

  2. 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

  3. .NET Framework Windows Programming 1 Chapter 1: Introducing C# Slide 3

  4. .NET Framework .NET 4.0 (2010) VS.NET 2010 Default: Windows 7 .NET 3.5 (Nov-2007) VS.NET 2008 Default: Windows 7 .NET 2.0 (Nov-2005) VS.NET 2005 .NET 3.0 (Nov-2006) Default: Windows Vista, Server 2008 .NET 1.1 (Apr-2003) VS .NET 2003 Default: Server 2003 .NET 1.0 (Feb-2002)

  5. 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 Windows Programming 1 Chapter 1: Introducing C# Slide 5

  6. .NET Framework -CLR • Common Language Runtime Architecture Windows Programming 1 Chapter 1: Introducing C# Slide 6

  7. MS IL CLR Writing Applications Using the .NET Framework .NET Framework CT C#.NET C# Compiler Programmer CT VB.NET VB .NET Compiler 1011010 1011010 1011010 CT J#.NET J# .NET Compiler CT C++.NET C++ Compiler

  8. Writing Applications Using the .NET Framework Windows Programming 1 Chapter 1: Introducing C# Slide 8

  9. Assembly • Managed Modules • Chứa IL code để thực thi • Chứa resource, metadata… • Portable Executable (PE) • Process assembly (EXE) • Library assembly (DLL) .NET Assembly EXE DLL

  10. Managed Code • Software that is written using the .NET Framework is called Managed Legacy Software (unmanaged code) Managed Executable Common Language Runtime Windows (OS khác)

  11. Garbage collection class myClass{ void Method(){ variable v1; variable v2; do{ …. } } Managed Heap B A E C D A và D sẽ bị xoá do ko còn tham chiếu hay truy cập tới

  12. 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

  13. Namespaces Windows Programming 1 Chapter3: Variables and Expressions Slide 13

  14. Namespace

  15. Framework (Base) Class Library FCL/BCL • 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

  16. 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 .NET App .NET App .NET App

  17. C# Language

  18. WHAT IS C#? • Applications You Can Write with C# • Windows applications • Web applications • Web services: Windows Programming 1 Chapter 1: Introducing C# Slide 18

  19. 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 Windows Programming 1 Chapter 1: Introducing C# Slide 19

  20. Visual Studio Solution explorer Visual designer Toolbox windows Properties windows Windows Programming 1 Chapter 1: Introducing C# Slide 20

  21. 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 Windows Programming 1 Chapter 1: Introducing C# Slide 21

  22. Project details Solution folder contents Project folder contents References – class libraries used by this application Solution file (.sln) and project file (.csproj) are created by VS and contain solution/project configuration information Windows Programming 1 Chapter 1: Introducing C# Slide 22

  23. Creating a Visual Studio project • Demo Windows Programming 1 Chapter 1: Introducing C# Slide 23

  24. Week 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

  25. Visual C# 2010 Ultimate Windows Programming 1 Chapter 2: Writing a C# Program Slide 25

  26. CONSOLE APPLICATIONS Windows Programming 1 Chapter 2: Writing a C# Program Slide 26

  27. WINDOWS FORMS APPLICATIONS • MO_BAI1 Windows Programming 1 Chapter 2: Writing a C# Program Slide 27

  28. The Solution Explorer Windows Programming 1 Chapter 1: Introducing C# Slide 28

  29. The Properties Window Windows Programming 1 Chapter 1: Introducing C# Slide 29

  30. Code view Windows Programming 1 Chapter 1: Introducing C# Slide 30

  31. The Error List Window Windows Programming 1 Chapter 1: Introducing C# Slide 31

  32. SUMMARY ? ? ? Windows Programming 1 Chapter 2: Writing a C# Program Slide 32

  33. Week 1: THE C# LANGUAGE Chapter 3:Variables and Expressions Basic C# syntax Variables and how to use them Expressions and how to use them

  34. 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 34

  35. block • These blocks, which are delimited with curly brackets ({ and }), may contain any number of statements, or none at all Windows Programming 1 Chapter3: Variables and Expressions Slide 35

  36. 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 Windows Programming 1 Chapter3: Variables and Expressions Slide 36

  37. 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. Windows Programming 1 Chapter3: Variables and Expressions Slide 37

  38. 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 Windows Programming 1 Chapter3: Variables and Expressions Slide 38

  39. Simple Types Windows Programming 1 Chapter3: Variables and Expressions Slide 39

  40. Simple Types Windows Programming 1 Chapter3: Variables and Expressions Slide 40

  41. Simple Types Windows Programming 1 Chapter3: Variables and Expressions Slide 41

  42. Using Simple Type Variables • Mo_b3 Windows Programming 1 Chapter3: Variables and Expressions Slide 42

  43. 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. Windows Programming 1 Chapter3: Variables and Expressions Slide 43

  44. String Literals Windows Programming 1 Chapter3: Variables and Expressions Slide 44

  45. String Literals • This means that the following strings are equivalent: "Karli \’s string." "Karli \u0027 s string.“ • @ "A short list: item 1 item 2“ • "C:\\Temp\\MyDir\\MyFile.doc“ @ "C:\Temp\MyDir\MyFile.doc" Windows Programming 1 Chapter3: Variables and Expressions Slide 45

  46. EXPRESSIONS • Operators can be roughly classified into three categories: • ➤ Unary— Act on single operands • ➤ Binary—Act on two operands • ➤ Ternary—Act on three operands Windows Programming 1 Chapter3: Variables and Expressions Slide 46

  47. Mathematical Operators Windows Programming 1 Chapter3: Variables and Expressions Slide 47

  48. Windows Programming 1 Chapter3: Variables and Expressions Slide 48

  49. Manipulating Variables with Mathematical Operators Windows Programming 1 Chapter3: Variables and Expressions Slide 49

  50. Assignment Operators Windows Programming 1 Chapter3: Variables and Expressions Slide 50

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