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ASP.NET

ASP.NET. The .NET Framework. The .NET Framework. The .NET Framework is Microsoft’s distributed run-time environment for creating, deploying, and using applications over the Internet.

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ASP.NET

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  1. ASP.NET The .NET Framework

  2. The .NET Framework • The .NET Framework is Microsoft’s distributed run-time environment for creating, deploying, and using applications over the Internet. • Chapter 21 presents the concepts and defines the terms that will help you understand how the .NET architecture adds to Windows a new operating system layer called the Common Language Runtime (CLR).

  3. Common Language Runtime (CLR) • The Common Language Runtime (CLR) is an operating system environment that can execute computer code compiled from several different languages. • When you install the .NET framework, the CLR gets added on as a new layer of your computer’s operating system.

  4. Managed Code (Compiled from a CLR-compliant programming language) Common Language Runtime (CLR) Call upon the traditional Windows OS to execute system functions, such as opening a file New features added to Windows by the CLR, such as automatic garbage collection Win32 OS (The traditional windows operating system)

  5. Microsoft Intermediate Language (MSIL) • When you write a .NET computer program in a language such as Visual Basic, C#, or JScript, your code needs to be compiled into an executable format that the CLR can run. • The Microsoft Intermediate Language (MSIL) defines the format of the compiled computer code that the Common Language Runtime (CLR) executes.

  6. Just-In-Time Compiler (JITter) • In the .NET framework, the Just-In-Time Compiler (JITter) is the operating system component that creates on demand the MSIL code that executes in the CLR when it runs a program written in a CLR-compliant programming language such as Visual Basic, C#, and JScript. • For mission-critical applications in which speed is important, it is possible to pre-compile the code and thereby avoid the delay that can occur when a program first compiles.

  7. Namespaces • A namespace is a logical division intended to prevent name conflicts between elements in a hierarchical organization of objects, interfaces, and functions.

  8. The .NET Framework Class Library • A class is a logical partitioning of the objects, methods, functions and data that perform a given task within a namespace. • The .NET Framework Class Library is comprised of the namespaces that provide access to system functionality and serve as the foundation on which .NET applications, components, and controls are built. • The built-in namespaces begin with System or Microsoft.

  9. ASP.NET Web Forms • A Web Forms Page is an ASP.NET developmental architecture that uses a code-behind programming model to separate the design of an active server page from its code. • The ASP.NET page has the filename extension .aspx, while the code-behind page has the filename extension of a CLR-compliant programming language.

  10. ASP.NET Web Form

  11. Web Services • A Web Service is a type of computer application that receives and responds to XML requests received over HTTP from clients on the Internet. • Because HTTP is the most basic protocol on the Internet, the Web Service enables you to write program components that can serve any end-user or computer in the world to which you provide access.

  12. Web Services

  13. Simple Object Access Protocol (SOAP) • The Simple Object Access Protocol (SOAP) is an XML vocabulary describing function calls and their procedures. • SOAP is the most popular wire format for communicating with Web Services. • To enable universal communication, Web Services can also communicate using HTTP-GET and HTTP-POST, which are wire format protocols understandable by any computer on the Web.

  14. ADO.NET • ADO.NET is a new collection of active data objects that improve on the former ADO architecture in several important ways. • First, ADO.NET replaces the Recordset with a new structure called the Dataset, which is a cache of records retrieved from the database. • Unlike the Recordset, which contains a single table of data, the Dataset can contain multiple, separate tables and maintain the relations among them.

  15. ADO.NET (continued) • Second, ADO.NET makes more efficient use of database resources by disconnecting from the database after filling the dataset. • This enables the database to serve more users as traffic at a Web site increases.

  16. ADO.NET (continued) • Third, ADO.NET uses XML to communicate with external processes. Because XML is a plain text protocol, database results can pass through firewalls that block non-HTML transmissions. • Fourth, because XML enables rich data objects to be communicated in plain text, ADO.NET increases performance by avoiding the time-consuming step of data-type conversion.

  17. ADO.NET

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