Rupeng Net. Net basics 1 Chapter 1:. net entry,. Net

Rupeng Net. Net basics 1 Chapter 1:. net entry,. Net

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TIPS:

1. Program comments: single-line comments and multi-line comments;

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Section 1st. Net learning routes and several confusing concepts

C # process programming syntax

C # basic object-oriented syntax

Basic Class Library

A large number of case exercises

Mysql sqlserver

Ado.net

A large number of case exercises

Integrated Project

Subsequent HTML/JavaScript/L3 architecture/asp.net/project

 

Three concepts:

. Net: The platform provides virtual machines and class libraries for writing programs (dot net should not be called dot net)

C #: development language (or VB.net PowerShell rube)

ASP. Net:. net development website Technology (mobile phone MCU, etc)

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Section 2nd. Net Development Environment Description and Installation

　　Visual Studio (VS) is recommended to use version 2012 (official, free Express version) and the open-source tool MonoDevelop SharpDevelop)

Download Visual Studio 2012:

1: http://www.xiazaiba.com/html/7678.html

2: http://www.jb51.net/softjc/64094.html

 

With the. Net Framework installed, you can develop programs without.

. Net Framework Version: 2.0 3.0 3.5 4.0 4.5 and other versions compatible (to the lower version, not to the higher version)

Windows 7 is recommended for operating systems.

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Section 3rd compile the program with notepad and csc (*)Notepad Development

Try to do it later. It's okay if the configuration doesn't come out. Next, let's talk about.

Steps:

1. Create a text file with the following content:

 

Using System; class Test {static void Main (string [] args) {Console. WriteLine ("rupeng net"); Console. ReadKey ();}}

2. Save it as Test. cs (the C # file suffix is. cs). Note that the file extension is displayed. Different operating systems have different settings. Note: C # is case-sensitive. Therefore, you cannot write Main as main. Do not mistakenly write Main as Mian. We are not "selling;

3. Open the cmd command prompt (start → run/Win + R)

4. Run cd in the folder where Test. cs is located and run: C: \ Windows \ Microsoft. NET \ Framework \ v4.0.30319 \ csc.exe test.csto compile and generate test.exe.

Execute test.exe in 5th Region

C # programmers can also be cool B, but we generally keep it hidden!

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Section 4th. netframework introduction and interface are not our focus (*) 

. Net programs must depend on. Net Framework and cannot run independently.

The generated exe and dll are not common "native", but "assembly" and are "MSIL/IL" binary bytecode.

The CLR (runtime) in. Net Framework is the core of the. Net program.

Linux, IOS, and other non-Windows systems can also run the. net program through Mono.

Android and IOS can also use Xamarin to use C # To develop mobile apps.

Microsoft has released. Net open-source, which can run. Net programs on Linux and IOS, and provides Visual Studio Community for free.

------------------------------------------------ Section 5th basic use of Visual Studio1. create a project (a collection of Code) (file new project (template C # console Program installed) Program. cs *. csproject project description file App. config configuration file Bin written code generated *. location of the exe running file *. sln solution description file note: 1. do not use Chinese characters; quotation marks and "" quotation marks. 2. C # is a case-sensitive compilation failure. Check the "Error List" view, which contains error information. You can create multiple projects under a solution. When opening one CS file, the project will be opened. Console. Readkey () waits for the user to enter a key. (Automatically completed) which startup project should be selected when multiple projects are created. "Set as startup project" ------------------------------------------------ Section 6th comments (Code ignored by the compiler)

The annotated code compiler does not. Purpose: describe the role of the Code: Add appropriate comments in the program, and block useless code.

Use "//" to comment out a line of code, and the code compiler will ignore it (add a comment to the example code ).

Ctrl + E + C comments

Ctrl + E + U uncomment

/**/Comment out multiple lines of code.

(*) There is also a "//" document comment.

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Section 3 decompilation artifacts and Compiler Optimization

Compile: CSC generates exe

Decompilation: exe => cs

Decompilation tool download:

1) Reflector)

1: http://www.xiazaiba.com/html/5268.html

 

2) ILSpy

1: http://www.orsoon.com/Soft/14703.html

2: http://ilspy.net/

In principle, it cannot be restored as is:

1. The comment does not exist.

2. Compiler Optimization: code that has no meaning or impact on the system will be optimized (useless variables and constant merging)

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Rupeng Network: http://www.rupeng.com