Asp.Net 3 5 Part 1


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Asp.Net Introduction

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Asp.Net 3 5 Part 1

  1. 1. Building Effective Web Applications with ASP .Net 3.5 ASIM SHAHZAD
  2. 2. Target Audience • Prior web development experience • Best geared towards programmers, software engineers, web designers, technical leads, task leads and architects. • Class will be taught using C# which has a similar syntax to Java
  3. 3. Course Objectives • Become familiar with new features in ASP .Net 3.5 • Build database driven apps using LINQ • Leverage ASP .Net AJAX on both the client and server side • Learn about state management and caching • Secure your ASP .Net websites
  4. 4. Course Roadmap • Week 1 – Getting Started • Week 2 – Data Access, ADO .Net and LINQ • Week 3 – AJAX • Week 4 – State Management and Caching • Week 5 – Security • Week 6 – End to End app and SP1
  5. 5. Course Text and Code Samples ASP .Net 3.5 Unleashed ( author Stephen Walther - Sam’s Publishing) Code samples available for download at o CD that accompanies the book has both C# and VB .Net versions of the code o Chapter 1 is available as a free download from o Demo how to run book code
  6. 6. Today’s Agenda – Getting Started • Tools We Will Use • ASP .Net 3.5 Overview • Project Setup/Configuration • WebForms Overview • Server Controls • User Controls • Master Pages • Debugging and Tracing • New Features in ASP .Net 3.5
  7. 7. ASP .Net 3.5 Overview • ASP .Net 3.5 is a technology that allows programmers to create dynamic web sites. • ASP .Net can be used to create small personal web sites or Enterprise applications • ASP .Net is part of the .Net Framework • .Net Framework consists of the Framework Class Library and the Common Language Runtime
  8. 8. Tools We Will Use • VS 2008 Professional or Visual Web Developer 2008 • SQL Server Express Edition or higher (2005 or 2008) Express Edition or higher • Links to download these products can be found on • VS2008 available from MS, MSDN or Team System subscription or contact Bill Scherer Jr (SRA Enterprise Solutions
  9. 9. Working with .Net Projects – VS2003 • VS2003: Single solution file. Project precompiled into a single DLL, ASPX markup pages deployed. • Pros: – Compiles/debugs like other projects (WinForms, etc.) – Slightly more efficient. – Single file deployment + referenced DLLs + HTML. • Cons: – Not easy to use in team environments. – Often leads to monolithic DLLs for large sites.
  10. 10. Working with Projects - VS2005 VS2005: Website Compilation Model – All files compiled on demand. Pros: Works better in teams. Easy to deploy/test incremental updates. Cons: Can be difficult to upgrade from VS2003. First hit incurs compilation overhead. May mean more files to deploy.
  11. 11. Working with Projects - VS2008 • VS2008: Both models supported out of the box. File -> New -> Web Site File -> New -> Web Site File -> New -> Project -> ASP.NET Web App New style New style Old style New style
  12. 12. Demo • Create a new website using ASP .Net 3.5 and VS2008
  13. 13. Web Forms Key Points • ASPX pages handled by a handler that facilitate the page lifecycle and events (such as Page_Load, PreRender, and control events). • Uses ViewState to encoded state-specific information otherwise lost in the stateless nature of HTTP. • Extensive controls library to abstract functionality. Buttons, textboxes, etc. • Extensible. • Web Forms have a .aspx file extension.
  14. 14. Server Controls • Typically compiled into a DLL. • Represents a small piece of functionality, like a textbox or button. • Responsible for handling any special rendering requirements, raising events, etc. Properties Event Handlers
  15. 15. User Controls • Collections of HTML and/or Server Controls for a broader purpose – such as a login dialog box. • Typically part of a project and compiled with the project. • Can expose properties.
  16. 16. HTML Controls • Take any HTML tag and add a runat=“server” tag. • This converts the HTML tag into a server- side ASP .Net control • Allow us to program server side events
  17. 17. Master Pages • Same look and feel to many pages; code in one spot.
  18. 18. ViewState (p29) • The HTTP Protocol is a stateless protocol • Web Pages use a Request/Response model • ViewState allows us to save the state of a server control across multiple page requests • Comes with performance overhead • Enabled by default for each control
  19. 19. Demo • Add page level tracing to existing page • Examine page lifecycle • Examine Viewstate cost • Write to trace log • We can determine if the page is posting back by using the Page.IsPostback property • We can turn tracing and debugging
  20. 20. Dynamic Compilation (p35) • When we create an ASP .Net page we are creating source code for a .Net class • Pages are compiled and stored in a temp folder on the web server • Unlike classic ASP the page will not be recompiled again, unless we disable dynamic compilation • This allows support for thousands of
  21. 21. Code Behind vs Single File Pages • In a single file ASP .Net page, a single file contains both the page code and page controls • A code behind has the page code in a separate file • Which should you use? (p45)
  22. 22. New Features of VS2008 • Javascript Intellisense/Debugging support • Nested Master Pages • Enhanced CSS Management • Multi-targeting support. • New data controls. • MUCH improved designer.
  23. 23. Other ASP .Net Resources • MSDN Web site • • MSDN Virtual Labs • MS Tech-ED Developer presentations on my SRA portal site • VS 2008 Training Kit • •
  24. 24. Questions ? • Feel free to contact me at • Thank you!