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Asp Architecture

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Om Vikram Thapa
Om Vikram Thapa

The document summarizes the ASP.NET architecture and its differences from ASP. ASP.NET runs on the .NET framework and provides a common language runtime, type system and class library. It supports multiple programming languages and compiles code to intermediate language for execution. ASP.NET applications can be built as web forms or XML web services. It provides better performance, security and stability than ASP due to features of the .NET framework like memory management and just-in-time compilation.

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ASP.NET Architecture Om Vikram Thapa
Contents Active Server Pages ASP and HTML ASP and ASP.NET ASP and .NET What is .NET? Managed and Unmanaged Execution .NET Framework Common Type System Common Language Specification. Common Language Runtime. Compilation and Execution. ASP.NET Architecture ASP.NET Application Types. ASP and ASP.NET
Active Server Pages Web pages containing server-side scripts in addition to Text and HTML Tags. It runs inside the IIS. Server-side scripts are special commands in Web pages that are processed before the pages are sent from Web Server to the Web Browser of client. When Browser requests ASP File, IIS passes request to ASP Engine . ASP Engine reads ASP File line by line, executes scripts and ASP File is returned to Browser as a plain HTML File.
HTML and ASP Server-side Scripts cannot be written in HTML. Scripts denoted by delimiters : < > Cannot access any Database. Scripts can be viewed from the Browser. Pages are Static. Pages denoted by .html or .htm Server-side Scripts can be written using ASP. Scripts denoted by delimiters: <% %> Can access any Data or Database. Scripts cannot be viewed from the Browser. Pages are Dynamic. Pages denoted by .asp or .aspx for ASP.NET HTML ASP
.NET and ASP What is .NET? Platform Neutral Framework from Microsoft Is a layer between the operating system and the programming language. It supports 24 programming languages: Visual Basic, C# , J# , C++, Perl etc. .NET provides a common set of class libraries, which can be accessed from any .NET based programming language. Managed and Unmanaged Execution Environment Unmanaged Code : Converted directly into Native Code. Managed Code : Converted to an Intermediate Language which can be executed from any environment having the .NET Framework.
.NET Framework Operating System Common Language Runtime Base Class Library ADO.NET and XML ASP.NET Windows Forms Common Language Specification VB C++ C# JScript … Visual Studio.NET
Inside the .NET Framework Common Type System [CTS]: Provides every language running on .NET platform with a base set of Data Types. Everything in the CTS is an object Most languages implement aliases to those types e.g. a four-byte integer value is represented by the CTS type System.Int32 but C# defines an alias for this type called int . Common Language Specification [CLS] The CLS is a set of rules that a language compiler must follow in order to create .NET applications The CLS defines the following things Common variable types (called CTS ) Common visibility like when and where can one see these variables, Common method specifications , and so on.
Inside the .NET Framework Contd… Common Language Runtime [CLR] Manages the execution of code compiled for the .NET platform. Following Steps occur in CLR: Managed Code created by VB or C# compilers and converted into MSIL . MSIL contains the IL Code and the METADATA . MSIL is kept in a file called ASSEMBLY along with Metadata . CLR loads and verifies the assembly to make sure that IL is ok. Just In Time Compiler [JIT] in CLR converts this IL to machine code. Garbage Collector - Automatic allocation and release of Memory. Base Class Library allow us to interact with the runtime, and provide additional useful functionality. Provides services and Objects needed to write applications.
Compilation & Execution Source Code Compilation Code (IL) Metadata MSIL Language Compiler Native Code Execution JIT Compiler
ASP.NET Architecture Web clients communicate with ASP.NET applications through IIS . IIS authenticates the request. If “ Allow Anonymous” is turned on, no authentication occurs. IIS also finds the requested resource. If the Client is authorized, IIS returns the appropriate resource. Web Clients ASP.NET Applications IIS .NET Framework Windows NT/2000/XP Operating System
ASP.NET Application Types Two types of Applications: Web Forms: XML web services. Web forms allow us to build form-based web pages .We can use ASP.NET server controls to create common UI elements, and program them for common tasks . XML Web services are software applications that use XML to exchange data (information) with other applications on other computers by using Internet protocols.
ASP.NET and ASP Multiple language Support ASP.NET pages are compiled. Functional Codes separated from presentation code. Browser-independent applications. Memory leak, deadlock, and crash protection. Better performance due to caching of code during compilation. Provides more security and stability because of the .NET Framework. Only scripting languages supported ASP pages are interpreted. Both HTML and script are present in a single page. Browser-dependent applications. No such protections available in classical ASP. ASP pages are not compiled hence performance is not good as compared to ASP.NET. Security and Stability is not optimum as compared to ASP.NET ASP ASP.NET
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Asp Architecture

  • 1. ASP.NET Architecture Om Vikram Thapa
  • 2. Contents Active Server Pages ASP and HTML ASP and ASP.NET ASP and .NET What is .NET? Managed and Unmanaged Execution .NET Framework Common Type System Common Language Specification. Common Language Runtime. Compilation and Execution. ASP.NET Architecture ASP.NET Application Types. ASP and ASP.NET
  • 3. Active Server Pages Web pages containing server-side scripts in addition to Text and HTML Tags. It runs inside the IIS. Server-side scripts are special commands in Web pages that are processed before the pages are sent from Web Server to the Web Browser of client. When Browser requests ASP File, IIS passes request to ASP Engine . ASP Engine reads ASP File line by line, executes scripts and ASP File is returned to Browser as a plain HTML File.
  • 4. HTML and ASP Server-side Scripts cannot be written in HTML. Scripts denoted by delimiters : < > Cannot access any Database. Scripts can be viewed from the Browser. Pages are Static. Pages denoted by .html or .htm Server-side Scripts can be written using ASP. Scripts denoted by delimiters: <% %> Can access any Data or Database. Scripts cannot be viewed from the Browser. Pages are Dynamic. Pages denoted by .asp or .aspx for ASP.NET HTML ASP
  • 5. .NET and ASP What is .NET? Platform Neutral Framework from Microsoft Is a layer between the operating system and the programming language. It supports 24 programming languages: Visual Basic, C# , J# , C++, Perl etc. .NET provides a common set of class libraries, which can be accessed from any .NET based programming language. Managed and Unmanaged Execution Environment Unmanaged Code : Converted directly into Native Code. Managed Code : Converted to an Intermediate Language which can be executed from any environment having the .NET Framework.
  • 6. .NET Framework Operating System Common Language Runtime Base Class Library ADO.NET and XML ASP.NET Windows Forms Common Language Specification VB C++ C# JScript … Visual Studio.NET
  • 7. Inside the .NET Framework Common Type System [CTS]: Provides every language running on .NET platform with a base set of Data Types. Everything in the CTS is an object Most languages implement aliases to those types e.g. a four-byte integer value is represented by the CTS type System.Int32 but C# defines an alias for this type called int . Common Language Specification [CLS] The CLS is a set of rules that a language compiler must follow in order to create .NET applications The CLS defines the following things Common variable types (called CTS ) Common visibility like when and where can one see these variables, Common method specifications , and so on.
  • 8. Inside the .NET Framework Contd… Common Language Runtime [CLR] Manages the execution of code compiled for the .NET platform. Following Steps occur in CLR: Managed Code created by VB or C# compilers and converted into MSIL . MSIL contains the IL Code and the METADATA . MSIL is kept in a file called ASSEMBLY along with Metadata . CLR loads and verifies the assembly to make sure that IL is ok. Just In Time Compiler [JIT] in CLR converts this IL to machine code. Garbage Collector - Automatic allocation and release of Memory. Base Class Library allow us to interact with the runtime, and provide additional useful functionality. Provides services and Objects needed to write applications.
  • 9. Compilation & Execution Source Code Compilation Code (IL) Metadata MSIL Language Compiler Native Code Execution JIT Compiler
  • 10. ASP.NET Architecture Web clients communicate with ASP.NET applications through IIS . IIS authenticates the request. If “ Allow Anonymous” is turned on, no authentication occurs. IIS also finds the requested resource. If the Client is authorized, IIS returns the appropriate resource. Web Clients ASP.NET Applications IIS .NET Framework Windows NT/2000/XP Operating System
  • 11. ASP.NET Application Types Two types of Applications: Web Forms: XML web services. Web forms allow us to build form-based web pages .We can use ASP.NET server controls to create common UI elements, and program them for common tasks . XML Web services are software applications that use XML to exchange data (information) with other applications on other computers by using Internet protocols.
  • 12. ASP.NET and ASP Multiple language Support ASP.NET pages are compiled. Functional Codes separated from presentation code. Browser-independent applications. Memory leak, deadlock, and crash protection. Better performance due to caching of code during compilation. Provides more security and stability because of the .NET Framework. Only scripting languages supported ASP pages are interpreted. Both HTML and script are present in a single page. Browser-dependent applications. No such protections available in classical ASP. ASP pages are not compiled hence performance is not good as compared to ASP.NET. Security and Stability is not optimum as compared to ASP.NET ASP ASP.NET