Programming with ASP.NET

Programming with ASP.NET  Hà Đồng Hưng Objectives ASP.NET and the Microsoft® .NET Framework “Looking back...“ Concepts and Architecture ASP.NET Application Models Using Visual Studio .NET Visual demos Objectives ASP.NET and the Microsoft® .NET Framework “Looking back...“ Concepts and Architecture ASP.NET Application Models Using Visual Studio .NET Visual demos Looking Back: Active Server Pages What is ASP? Server-side scripting technology Files containing HTML and scripting code Access via HTTP requests Scripting code is interpreted on server side What can I do with ASP? Easily and quickly create simple Web applications Generate dynamic Web content Client-side scripting for validation Access COM components to extend functionality Databases What’s Wrong with That? Mixes layout (HTML) and logic (scripting code) Interpreting ASP code leads to performance loss Uses scripting languages that are not strongly typed Microsoft JScript® Microsoft Visual Basic® Scripting Edition (VBScript) Browser compatibility No real state management No state sharing across Web farms State is lost when IIS fails Update files only when server is down ASP.NET Core Concepts Separate layout and business logic Use services provided by the .NET Framework Code is compiled the first time a page is requested State management Make use of programming languages Cross-language integration Update files while the server is running! Architecture The .NET Framework Architecture Web Application Model Class Hierarchy Advantages Microsoft .NET Framework System Services Common Language Runtime ASP.NET Web Forms Web Services Windows Forms Services Framework Base Data Debug ... The .NET Framework Architecture Web Application Model Class Hierarchy 1/2 Namespaces Hierarchically structured Dot-syntax, grouping classes logically Abstract base classes and class implementations You are free to implement your own Sample: System.Web.UI.WebControls.Button namespace class name How to use namespaces: Sample:using MyAlias = System.Web.UI.WebControls Class Hierarchy 2/2 System.Web.UI.WebControls Advantages Execute more quickly On-the-fly updates of deployed Web app Access to the .NET Framework Many programming languages Server controls Built-in security Integration with Microsoft ADO.NET Full support for XML, CSS Built-in features for caching, cultures… Objectives ASP.NET and the Microsoft® .NET Framework “Looking back...“ Concepts and Architecture ASP.NET Application Models Using Visual Studio .NET Visual demos Parts of a Web Application Content Web Forms, HTML, images, audio, video, other data Program logic Executable files, scripts Configuration Web configuration file, Style sheets, IIS settings Parts of ASP.NET App In a completed Web application, the executable portion of the Web form is stored in an executable (.dll) that runs on the server under the control of IIS. Application cycle Role of .NET Framework Objectives ASP.NET and the Microsoft® .NET Framework “Looking back...“ Concepts and Architecture ASP.NET Application Models Using Visual Studio .NET Visual demos The Visual Studio .NET programming environment Start page contains various panes to make information easier to find and to help simplify some common tasks, such as opening a recent file The Visual Studio .NET programming environment Visual Studio .NET Windows: two types of windows: Document windows: display the content of your application: the forms, Web pages, and code Tool windows: display the components you use to create your application. Controls database connections Classes properties The Visual Studio .NET programming environment The Visual Studio .NET programming environment Toolbox The Visual Studio .NET programming environment Solution Explorer Editing Web documents Editing HTML Editing code (VB.NET, C# …) Running a Project Toolbar: choosing Start from the Debug menu Keyboard: F5. ERROR ??? Results Cool webpage! Error webpage! Known error -> Correct it Unknown error -> Set breakpoint and Debug Getting Help Summary Web applications run on a server, processing user requests for pages and composing those pages using executable code and static resources on the server. Web applications can provide dynamic content based on dynamic server resources, such as a database, and based on user inputs, ASP.NET Web applications are made up of content, an executable, and configuration files. Summary The content of a Web application is presented through Web forms. use HTML components like conventional HTML pages; they can also respond to user events such as mouse clicks. Assemblies The Web application' s executable is stored in a .dll file called an assembly are compiled to an intermediate state the final compilation is done by the CLR just before running the application. Summary Visual Studio .NET Start page view current product information, to open new or existing projects, to set user environment preferences, and to sign up for Web hosting services. Edit Web Forms pages and HTML pages: visually by using the Document window' s Design mode; edit them as text by using the Document window' s HTML mode. Set the Help language filter view code samples in a single programming language or in multiple languages.