Hello , Is my ryukyu and yi .
Let's talk about it today ASP.NET And .NET Framework and C# The relationship between .
At the beginning ASP.NET Before , We need to understand the following operation first ASP.NET Development platform of .NET frame . If you've learned C# So right. .NET The framework will have a certain understanding . When you're writing ASP.NET You'll find that ASP.NET The code and C# Similar or even equivalent to . Then you must have some questions . What is the relationship between them ？ Let's see .
One 、.NET Framework Introduce
Microsoft.net yes 2000 year 6 month 22 On the th, Microsoft launched to the world , New software development and service platform , The purpose is to provide strong services to customers all over the world 、 Personalized Internet services . from 2002 The original version was released in 1.0, To 2012 Officially launched in 4.5, I've experienced 1.0、1.1、2.0、3.0、3.5 、4.0、4.5、4.7 Eight versions .
.NET The core of .NET Framework(.Net frame ) yes .NET Environment for program development and operation , Under this platform, it can be developed in different languages , because .NET It is a cross language platform . Language can be C#,F#,Visual Basic.NET wait .JAVA and .NET The difference is java It's cross platform , Not cross lingual ..NET Cross platform is limited to Android and IOS Apple system .
1、.NET Framework It contains the following two main components ：
CLR： Common language runtime （Common Language Runtime）, Provide internal management , Code security detection and other functions .
FLC：.NET Framework class library （.NET Framework Class Library）, Provide a large number of application class libraries , There are many thread resources available in the class library （ such as ： class 、 Method 、 attribute ） Increase of efficiency .
Its underlying structure is shown in the figure ：
2、 Common language runtime （CLR）
.NET Framework At the core of is the execution environment of its runtime , Called the common language runtime （CLR） or .NET Runtime . Usually will be CLR The code that runs under the control of is called managed code .
CLR Mainly responsible for compiling and running managed code . stay .NET The compilation of the code in is divided into two stages ：
（1） Compile the source code into Microsoft Interlingua （MSIL Microsoft Intermediate Language）.
（2）CLR hold MSIL Compile into platform specific machine code .
3、CLR Structure
CLR The structure of the consists of the following three parts ：
①CLS： Common language specification , Get all kinds of languages into a unified syntax .
②CTS： General type system , Convert data types in various languages into unified types
③JIT： Real time compiler （ Just in time compiler ） It is used to compile the converted language into binary language , hand CPU perform .
4、.NET Framework class library （FCL）
.NET The framework class library provides classes to realize basic functions , For example, input and output 、 String operation 、 Network communication, etc .
.NET Framework in , All namespaces are from System Formed by the namespace of .System Namespaces are also called root namespaces . The function of the corresponding namespace is shown in the figure below ：
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Two 、C#
With .NET The birth of the platform , Microsoft has launched the cooperation .NET Platform application development language ——C#(C Sharp).
Study C# Language , What kind of program can be developed ？ The program that can be developed is shown in the figure below ：
C# It's a .NET A programming language under the platform , It's just a language . Is running on the .NET CLR Upper , High level language for creating applications . Programming language is a tool to facilitate communication between developers and computers .
C#.NET The application compilation steps are as follows ：
1、 Use C# Write application code in ;
2、 hold C# The source program is compiled as Microsoft Interlingua （MSIL Microsoft Intermediate Language）, Exists as an assembly ;
3、 When executing code , You have to use JIT The compiler compiles the assembly into native code ;
4、 In escrow CLR Run native code in the environment , The program execution results are displayed ;
3、 ... and .ASP.NET
ASP.NET Microsoft's .NET The system provides Web Development framework , Website development technology is , yes .NET An application model in the framework , Used to generate based on Web Content rich programming framework for your application . Use ASP.NET Development Web Applications and keep them running , Simpler than other development languages . And Java、PHP and Per Compared with advanced technology ,ASP.NET It's convenient 、 flexibility 、 High production efficiency 、 High security and object-oriented , Is one of the mainstream network programming technologies .
ASP.NET Support 3 Development mode ：
1、Web Pages
Web Pages It's development ASP.NET The simplest development mode of web pages . It provides a simple way to HTML、CSS、JavaScript Combined with server script ：
(1) Easy to learn , Easy to understand , Easy to use ;
(2) Create around a single web page ;
(3) And PHP And classic ASP be similar ;
(4) Visual Basic perhaps C# Server script ;
(5) whole HTML、CSS and JavaScript control ;
Web Pages Built in database 、 video 、 graphics 、 Social media and more Web Helpers, So it's easy to expand .
This module can be developed and used separately , It can also be in MVC Used in combination with the template of the view in .
2、Web Forms
Web Forms There are three ways to create ASP.NET Website and Web One of the programming patterns of an application .
The other two programming modes are Web Pages and MVC（Model View Controller Model - View - controller ）.
Web Forms It's the oldest ASP.NET Programming model , It is integrated. HTML、 Event driven web pages for server controls and server code .
Web Forms Is compiled and executed on the server , Then generated by the server HTML Display as web page .
Web Forms There are hundreds of Web Controls and Web Component is used to create user driven websites with data access .
3、MVC
MVC It's a use MVC（Model View Controller Model - View - controller ） Design creation Web The pattern of the application ：
(1) Model（ Model ） Represents the core of the application （ For example, database record list ）.
(2) View（ View ） Display the data （ Database records ）.
(3) Controller（ controller ） Process input （ Write database records ）.
MVC The pattern also provides for HTML、CSS and JavaScript Full control of .
This development model is widely used in enterprises , Focus on mastering this development mode .
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