1. Introduction to ASP.NET What is.NET What is ASP.NET and how is different from ASP –ASP: server side technology for creating dynamic web pages using scripting languages eg vb script. –ASP.NET: server side technology for creating dynamic web pages using Fully Fledged programming languages supported by.NET –VB.NET: our chosen language for writing ASP.NET pages

2. What is.NET? A Microsoft strategy and new technology for delivering software services to the desktop and to the web Components include: – MS Intermediate Language; all code is complied into a more abstract, trimmed version before execution. All.NET languages are compiled to MSIL – the common language of.NET – The CLR- common language runtime; responsible for executing MSIL code; interfaces to Windows and IIS – A rich set of libraries (Framework Class Libraries) available to all.NET languages – The.NET languages such as C#, VB.NET etc that conform to CLR – ASP.NET is how the Framework is exposed to the web, using IIS to manage simple pages of code so that they can be complied into full.NET programs. These generate HTML for the browser. Built on open protocols (XML, SOAP) Future for development of MS & non-MS based systems. Also heading towards the “Internet Operating System”

3. Common Language Runtime Type System Compilers use the runtime type system to produce type compatible components Components Compilers Common Type System C#VBC++ Runtime Environment

4. Robust And Secure Native code compilation MSIL No interpreter Install-time or run-time IL to native compilation Code correctness and type-safety IL can be verified to guarantee type-safety No unsafe casts, no uninitialized variables, no out-of-bounds array indexing Evidence-based security Policy grants permissions based on evidence (signatures, origin)

5. .NET Execution Model VBVC...Script IL Native Code Common Language Runtime Standard JIT Compiler

6. Common Language Runtime Lightweight Just-in-time compiler: –MSIL to Native machine language –Can be ported to numerous platforms –Free/Net BSD UNIX port has been announced –“MONO” Open source movement

7. Framework Overview Base Class Library Common Language Specification Common Language Runtime Data and XML VBC++C# Visual Studio.NET Web Forms (ASP.NET) JScript… Win Forms

8. .NET Framework Architecture Common Language Runtime MetadataType SystemExecution System Base Framework IONetSecurityServiceProcess ADO.NETXMLSQLThreading System.Web Web ServicesWeb Forms ASP.NET Application Services System.WinForms ControlsDrawing Windows Application Services

9. ASP.NET ASP.NET provides a means of exposing the.NET Framework and its functionality to the WWW Contains a number of pre-built types that take input from.NET types and represents them in a form for the web (such as HTML) Class browser: http://interdev.csse.monash.edu.au/quickstart/aspp lus/samples/classbrowser/vb/classbrowser.aspx http://interdev.csse.monash.edu.au/quickstart/aspp lus/samples/classbrowser/vb/classbrowser.aspx

10. Web Services Web Services also provide a means to expose.NET functionality on the web but Web Services expose functionality via XML and SOAP (cf: function calls over the web)

11. How ASP.NET works When.NET is installed, IIS is configured to look for files with the.aspx extension and to use the ASP.NET module (aspnet_isapi.dll) to handle them. ASP.NET parses the.aspx file and arranges it in a predefined class definition and generates an asp.net page object. The page object generates html that is sent back to IIS and then the browser. NOTE: only.aspx files are parsed (if it is pure html don’t save it as an aspx file as it will slow down the server.

12. ASP.NET samples Page directives: VB.NET code declarations ……….. Message.aspx Inserting ASP.NET code Example Line1: First HTML Line Line2: Second HTML Line Line3: Third HTML Line

13. Message2.aspx Sub Page_Load() Response.Write ("First ASP.NET Line ") Response.Write ("Second ASP.NET Line ") Response.Write ("Third ASP.NET Line ") End Sub Inserting ASP.NET code Example Line1: First HTML Line Line2: Second HTML Line Line3: Third HTML Line

14. Message3.aspx html> Inserting ASP.NET code Example Line1: First HTML Line Line2: Second HTML Line Line3: Third HTML Line Sub Page_Load() Response.Write ("First ASP.NET Line ") Response.Write ("Second ASP.NET Line ") Response.Write ("Third ASP.NET Line ") End Sub

15. Render or inline code block – interweave1.aspx Interweaving ASP.NET code and HTML Example Line1: First HTML Line ") %> Line2: Second HTML Line ") %> Line3: Third HTML Line ") %> NOT RECOMMENDED.

16. Interweave2.aspx A Server control script language="VB" runat="server"> Sub Page_Load() Message.Text="The ASP.NET line" End Sub Inserting ASP.NET code Example First HTML Line Second HTML Line

17. The lab environment. IIS server – interdev.csse.monash.edu.au/cse2030…. Each student has write access to their own directory on interdev (Sstudentnum) URL: http:\\interdev.csse.monash.edu.au/cse2030/Sstude ntnum/message.aspx Interdev is not accessible outside Monash network.