When a request occurs for an ASP.Net page, the response is processed through a series of events before being sent to the client browser. These events, known as the Page Life Cycle, are a complicated headache when used improperly, manifesting as odd exceptions, incorrect data, performance issues, and general confusion. It seems simple when reading yet-another-book-on-ASP.NET, but never when applied in the real world. In this session, we decompose this mess, and turn the Life Cycle into an effective and productive tool. No ASP.NET MVC, no Dynamic Data, no MoroRail, no technologies of tomorrow, just the basics of ASP.NET, using the tools we have available in the office, today.

1. ASP.NET Page Life Cycle Dev Basics Series Jay Harris

2. About the Talk Covers Discuss:ASP.NET Page Life CycleProper use of Data Binding Events Involves only ASP.NET EventsNo MVC. No Silverlight.No Controls or DataSource Controls Tips & Tricks. And Traps. Life Cycle Data Binding Tips & Tricks Pain Points Overview What to expect out of this session

3. About the Speaker Covers Jay HarrisSoftware Consultant.NET Developer Ask Questions Anytime Please Give Feedback!http://www.speakerrate.com/jayharris/ Life Cycle Data Binding Tips & Tricks Pain Points Overview What to expect out of this session

4. The Agenda Anatomy of the ASP.NET Page Life Cycle

5. Page Start Agenda System Assigns Properties:RequestResponseUICulture System determines if the request is new or postback Start The Agenda Anatomy of the ASP.NET Page Life Cycle

6. Page Initialization Agenda System Prepares Controls:Available by UniqueIDProperties set from code/CIF values Applies Theme & MasterPageHandled in PreInit Start Initialization The Agenda Anatomy of the ASP.NET Page Life Cycle

7. Page Load Agenda If IsPostBack:Restores Properties from State Start Initialization Load The Agenda Anatomy of the ASP.NET Page Life Cycle

8. Render Agenda Saves ViewState & Renders Start Initialization Load Render The Agenda Anatomy of the ASP.NET Page Life Cycle

9. Control Validation Agenda If IsPostBack & Validators exist:Runs Validate() for All Validators…even the disabled ones Start Initialization Load Validation Render The Agenda Anatomy of the ASP.NET Page Life Cycle

10. PostBack Events Agenda If IsPostBack:Runs any Event Handlers as needed Includes events such as:TextBox.TextChangedDropDownList.SelectedIndexChangedButton.Click Start Initialization Load Validation Events Render The Agenda Anatomy of the ASP.NET Page Life Cycle

11. Easy to Remember Agenda “SILVER!”(as in medals & bars) Start Initialization Load Validation Events Render The Agenda Anatomy of the ASP.NET Page Life Cycle

12. Easy to Remember Agenda Wait. “SLIVER?!?”(no, not wood) Start Load Initialization Validation Events Render The Agenda Anatomy of the ASP.NET Page Life Cycle

13. Easy to Remember Agenda Huh? “LIVER?!?”(eww. gross. and there’s no onions) Start Load Initialization Validation Events Render The Agenda Anatomy of the ASP.NET Page Life Cycle

14. Easy to Remember Agenda “Hi-yo, Silver, away!”(The Lone Ranger) Start Initialization Load Validation Events Render The Agenda Anatomy of the ASP.NET Page Life Cycle

15. Running the Show Harnessing the ASP.NET Page Life Cycle*

16. Running the Show Subjected to the terms, limitations, availability, whims, will, desires, rules, patterns, provisions, agreements, covenants, conditions, assigns, successors, and approval of the ASP.NET worker process. Harnessing the ASP.NET Page Life Cycle*

17. Debugging Events Features Tracing Page-Level Page-Level Tracing: <%@ Page Trace=“true” %> Running the Show Harnessing the ASP.NET Page Life Cycle*

18. Debugging Events Features Tracing* Page-Level* Page-Level Tracing: <%@ Page Trace=“true” %> *Not available after Render Running the Show Subjected to the terms, limitations, availability, whims, will, desires, rules, patterns, provisions, agreements, covenants, conditions, assigns, successors, and approval of the ASP.NET worker process. Harnessing the ASP.NET Page Life Cycle*

19. Debugging Events Features Tracing* Page-Level* App-Level Application-Level Tracing: <configuration><system.web> <trace enabled=“true” /> </system.web></configuration> Running the Show Harnessing the ASP.NET Page Life Cycle*

20. Debugging Events Features Tracing* Page-Level* App-Level* Application-Level Tracing: <configuration> <system.web> <trace enabled=“true” /> </system.web></configuration> *Site-Wide Performance Hit Running the Show Subjected to the terms, limitations, availability, whims, will, desires, rules, patterns, provisions, agreements, covenants, conditions, assigns, successors, and approval of the ASP.NET worker process. Harnessing the ASP.NET Page Life Cycle*

21. Event Wiring Features Tracing* Wiring Manual Using the Constructor: public MyPage(){this.Load += PageLoad;}protected void PageLoad(…) Running the Show Harnessing the ASP.NET Page Life Cycle*

22. Event Wiring Features Tracing* Wiring* Manual* Using the Constructor: public MyPage(){this.Load += PageLoad;}protected void PageLoad(…) *Wire Control events in Page Init Running the Show Subjected to the terms, limitations, availability, whims, will, desires, rules, patterns, provisions, agreements, covenants, conditions, assigns, successors, and approval of the ASP.NET worker process. Harnessing the ASP.NET Page Life Cycle*

23. Event Wiring, Auto Features Tracing* Wiring* Manual* Auto-Wire Auto-Wire via Page_EventName: protected void Page_Load(…){ //Do some stuff} Running the Show Harnessing the ASP.NET Page Life Cycle*

24. Event Wiring, Auto Features Tracing* Wiring* Manual* Auto-Wire* Auto-Wire via Page_EventName: protected void Page_Load(…){ //Do some stuff} *Page only. Not for controls.*Performance Hit. Running the Show Subjected to the terms, limitations, availability, whims, will, desires, rules, patterns, provisions, agreements, covenants, conditions, assigns, successors, and approval of the ASP.NET worker process. Harnessing the ASP.NET Page Life Cycle*

25. Event Execution Features Tracing* Wiring* Execution Tree Top-Down Control Tree Execution First load the Page…then load the Container Control…then load the Child Control Running the Show Harnessing the ASP.NET Page Life Cycle*

26. Event Execution Features Tracing* Wiring* Execution* Tree* Top-Down Control Tree Execution First load the Page…then load the Container Control…then load the Child Control *Except: Initialization & Unload First unload Controls, then the Page Running the Show Subjected to the terms, limitations, availability, whims, will, desires, rules, patterns, provisions, agreements, covenants, conditions, assigns, successors, and approval of the ASP.NET worker process. Harnessing the ASP.NET Page Life Cycle*

27. Event Execution Features Tracing* Wiring* Execution* Tree* Collection Index-based Collection Execution page.Controls[0].OnLoadpage.Controls[1].OnLoadpage.Controls[2].OnLoad…page.Controls[n].OnLoad Running the Show Harnessing the ASP.NET Page Life Cycle*

28. Event Execution Features Tracing* Wiring* Execution* Tree* Collection* Index-based Collection Execution page.Controls[0].OnLoadpage.Controls[1].OnLoadpage.Controls[2].OnLoad…page.Controls[n].OnLoad * When was it added to Controls? Running the Show Subjected to the terms, limitations, availability, whims, will, desires, rules, patterns, provisions, agreements, covenants, conditions, assigns, successors, and approval of the ASP.NET worker process. Harnessing the ASP.NET Page Life Cycle*

29. Event Execution Features Tracing* Wiring* Execution* Tree* Collection* Index-based Collection Execution page.Controls[0].OnLoadpage.Controls[1].OnLoadpage.Controls[2].OnLoad…page.Controls[n].OnLoad * When was it added to Controls? Running the Show Subjected to the terms, limitations, availability, whims, will, desires, rules, patterns, provisions, agreements, covenants, conditions, assigns, successors, and approval of the ASP.NET worker process. Harnessing the ASP.NET Page Life Cycle*

30. Loading ViewState Features Tracing* Wiring* Execution* ViewState Control State is loaded twice Once immediately prior to LoadOnce immediately following Load Running the Show Harnessing the ASP.NET Page Life Cycle*

31. Loading ViewState Features Tracing* Wiring* Execution* ViewState* Control State is loaded twice Once immediately prior to LoadOnce immediately following Load *Not restored if modified prior Running the Show Subjected to the terms, limitations, availability, whims, will, desires, rules, patterns, provisions, agreements, covenants, conditions, assigns, successors, and approval of the ASP.NET worker process. Harnessing the ASP.NET Page Life Cycle*

32. Displaying Data Effectively Binding Dynamic Data to the Page

33. DataBind(); Data Control.DataBind();Only for the specific contoland its child controls Page.DataBind();Binds all controls on the page DataBind(); Displaying Data Effectively Binding Dynamic Data to the Page

34. Binding Events Data DataBindingBegins DataBinding of a control DataBind(); EventsDataBinding Displaying Data Effectively Binding Dynamic Data to the Page

35. Binding Events Data RowCreated / ItemCreatedManipulating item markupCannot be dependent on control data Row vs. Item Usage:RowCreated: GridViewItemCreated: DataGrid,ListView, Repeater, and everything else. DataBind(); EventsDataBindingRwCreated Displaying Data Effectively Binding Dynamic Data to the Page

36. Binding Events Data RowDataBound / ItemDataBoundManipulating item dataData is available within controls Row vs. Item Usage:RowCreated: GridViewItemCreated: DataGrid, ListView, Repeater, and everything else. DataBind(); EventsDataBindingRwCreatedRwDBound Displaying Data Effectively Binding Dynamic Data to the Page

37. Resources & Questions ResourcesMSDN: http://tinyurl.com/AspNetPageLifeCycleBlog: http://www.cptloadtest.comEmail: jayharris@harrisdesigns.comTwitter: @jayharris Questions? Wrap-up Taking the Next Steps with the ASP.NET Page Life Cycle

38. Thank You Jay Harris OnlineBlog: http://www.cptloadtest.comEmail: jayharris@harrisdesigns.comTwitter: @jayharris FeedbackRate: http://www.speakerrate.com/jayharris Wrap-up Taking the Next Steps with the ASP.NET Page Life Cycle