What is asp.net?

ASP.NET is an open source server-side web application framework developed by Microsoft. ASP.NET allows developers to create web applications, web services, and dynamic content-driven websites.

ASP.NET, also known as ASP, is not just a simple upgrade of ASP, but a new generation scripting language launched by Microsoft. ASP.NET is a Web development platform based on the .NET Framework. It not only absorbs the greatest advantages of previous versions of ASP and adds many new features based on the development advantages of Java and VB languages, but also corrects the running errors of previous ASP versions.

ASP.NET has all the solutions for developing website applications, including all functions such as validation, caching, state management, debugging and deployment. In terms of code writing, the feature is to separate page logic and business logic. It separates program code and displayed content, making it easier to write colorful web pages. At the same time, the program code looks cleaner and simpler.

Language features

Multi-language support

Multi-language support is ASP. One of the important new features of NET is mainly reflected in the wide variety of programming languages ​​it supports and the powerful functions of a single language. First of all, ASP.NET provides a "secondary compilation technology" similar to Java compilation technology for Web applications - MSIL (Microsoft Intermediate Language) execution architecture. ASP.NET applications are first compiled into MSIL, and then MSIL is compiled. executed in machine language. In this way, any programming language that can be compiled into MSIL can be used to write ASP.NET applications.

Secondly, the programming language supported by ASP.NET refers to the complete set of functions of this language (not a subset). Therefore, the functions of each programming language in ASP.NET are better than the VB used in ASP. script and Java Script are more powerful.

Enhanced performance

In ASP.NET, the page code is compiled and executed, which uses early binding, just-in-time compilation, local optimization and caching services to Improve performance. When a page is requested for the first time, cLR compiles the page program code and the page itself, and saves a copy of the compilation results in the cache cache. When the page is requested for the second time, the results in the cache are used directly (no need to compile again). This greatly improves page processing performance.

Classes and Namespaces

ASP.NET contains a complete set of useful classes and namespaces (Namespaces). Namespaces are used as an organizational mechanism—a way to represent program components that can be used in other programs and applications. The namespace contains classes. Like class libraries, namespaces can make writing Web applications easier. HtmlAnchor, HtmlContrl and HtmlForm are several classes in ASP.NET, which are included in the System.web.UI.HtmlControl space.

Server Controls

ASP.NET provides many powerful server controls, which greatly simplifies the task of creating web pages. These server controls provide common functionality from displays, calendars, tables, and user input validation. They automatically maintain their selection state and allow server-side code to access and call their properties, methods, and events. Therefore, server controls provide a clear programming model, making the development of Web applications simple and easy.

Support web services

ASP.NET provides powerful, standardized web service support capabilities. By using Internet standards, one web service can be combined with other web services integrated together. Web services provide the basic modules for building distributed web applications. ASP.NET allows the use and creation of web services.

Higher security

Compared with ASP, in addition to supporting conventional windows authentication methods, ASP.NET also provides Passport and cookie. Different types of login and authentication methods. At the same time, ASP.NET also adopts a role-based security model to specify different security authorizations for users in different roles. On the other hand, ASP.NET also makes it easier to create page-based authentication.

Good scalability

In ASP.NET, cross-Server Sessions are allowed to be used, whose session state can be used by another machine Or maintained by another process on another database. As information processing and transmission traffic increases, more Web servers can be added to the system.

Cookieless Session

Even if the browser does not allow the use of cookies, ASP.NET can still enable users to use session state. Unlike sessions with cookies, cookieless sessions pass the session ID (SessionID) to the ASP.NET page through the URL. [8]

Recommended courses: ASP.NET Tutorial

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