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how to display context information for template parsing and instantiation? File name? line number?
how to do this for Theme (skin files)?
how to correctly highlight source code displayed for exception context?
checkbox if checked, posted, unchecked and then post, it will be checked.
think more about encoding/decoding
<%@ MasterClass="Pages.MasterPage" %>
Features to be implemented later:
- SmartNavigation: TForm, TPage
- DefaultButton: TForm, TClientScriptManager
Main Problems:
1. How to solve viewstate ID mapping problems? What if a control has changed its ID before saving viewstate?
5. What if in a getter, it needs to address a sibling or child control?
6. learn more details about WebParts
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/odc_sp2003_ta/html/sharepoint_northwindwebparts.asp
When a page is requested, asp.net 2.0 does the following
- application creates the page instance by new operator
- application invokes page.processrequest
- page.frameworkinitialize is invoked
- ... ControlBuilder.InitObject(page)
- ... ... set SkinID
- ... ... apply stylesheet skin
- ... ... init simple properties (basic property types)
- ... ... init complex proprerties (e.g. Font-Name), may need to call InitObject on Font
- ... ... init data bindings
- ... ... call BuildChildren if item implements IParserAccessor (Control implements it)
- ... ... ... for each body item
- ... ... ... ... get the control builder for the control class
- ... ... ... ... call ControlBuilder.BuildObject
- ... ... ... ... ... call InitObject
- ... ... ... ... if it is user control (control with template)
- ... ... ... ... ... call UserControl.InitializeAsUserControl(page)
- ... ... ... ... ... ... call frameworkinitialize (won't call InitObject anymore)
- ... ... ... ... call control.AddParsedSubObject(item)
- ... ... init template properties (should be a property with template type, will use TemplateBuilder to build the object)
- ... ... bind field to control (pass some fields from TemplateControl to the new control)
How is a UserControl initialized if created dynamically?
- ... InitializeAsUserControl invoked in OnInit (which will be caught up if the control is dynamically created)
Findings:
Control lifecycles:
const CS_CONSTRUCTED=0; // after constructor
const CS_FRAMEWORK_INITIALIZED=1; // after children created and properties set
const CS_CHILDREN_INITIALIZED=2; // right before OnInit (also before applySkin, but after children OnInit)
const CS_INITIALIZED=3; // right after OnInit
const CS_STATE_LOADED=4; // right after loading state
const CS_LOADED=5; // right after loaded
const CS_PRERENDERED=6; // right after prerender
stylesheet is applied before setting control properties (after skinID is set)
skin is applied right before OnInit
ControlBuilder is responsible to call AddParsedSubObject
Its BuildChildren is
My understanding of lifecycles:
Page constructed (using new operator)
Page.ProcessRequest
Page.FrameworkInitialize
Page.InitializeStyleSheet
Page.determinePostBackMode
Page.loadScrollPosition
Page.performPreInit
Page.initRecursive
Page.onInitComplete
Page.loadAllState
Page.processPostData
Page.onPreLoad
Page.loadRecursive
Page.processPostData
Page.raiseChangedEvents
Page.raisePostBackEvent
Page.onLoadComplete
Page.raiseCallBackEvent -> exit
Page.preRenderRecursive
Page.performPreRenderComplete
Page.saveAllState
Page.onSaveStateComplete
Page.renderControl
Page.unloadRecursive
Possible solution for SkinID: setting SkinID will cause skin change immediately.
With control hierarchy storing:
Page constructed (template parsed but not instantiated)
Page.loadAllState <---- page state totally restored
Page.loadRecursive
Page.processPostData
Page.raiseChangedEvents
Page.raisePostBackEvent or Page.raiseCallBackEvent
Page.preRenderRecursive
Page.saveAllState
Page.renderControl
Page.unloadRecursive
Page constructed
Page.frameworkInitialize (instantiating template)
Page.initRecursive
Page.saveAllState
Page.renderControl
Page.unloadRecursive
edit distance.
(UIUC) Jiawei Han: graph similarity mining
module service?
page service?
index.php?page=path.to.page
TODOs
renderer??
Dispose
-->> viewstate id-based or index-based, structure keeping?? <<--
HttpContext, url/path
template path
adapter
parser
class metadata attributes:
e.g. the body content of a control can be parsed as child controls, or property values
or list items
Imagine a usecase (hmmm...could have problem....) How to specify two list properties for a single control?
<com:TListBox>
<ID>abc</ID>
<Items>
<ListItem Value="yyy">xxx</ListItem>
<ListItem>yyy</ListItem>
</Items>
</com:TListBox>
how to define a control with template??
TemplateControl.LoadControl or LoadTemplate is used for controls that allows taking template contents for their attributes.
UserControl! starting from the template instead of class
idNotCalculated = 1;
marked = 2;
disableViewState = 4;
controlsCreated = 8;
invisible = 0x10;
visibleDirty = 0x20;
idNotRequired = 0x40;
isNamingContainer = 0x80;
creatingControls = 0x100;
notVisibleOnPage = 0x200;
themeApplied = 0x400;
mustRenderID = 0x800;
disableTheming = 0x1000;
enableThemingSet = 0x2000;
styleSheetApplied = 0x4000;
controlAdapterResolved = 0x8000;
designMode = 0x10000;
designModeChecked = 0x20000;
disableChildControlState = 0x40000;
isWebControlDisabled = 0x80000;
controlStateApplied = 0x100000;
useGeneratedID = 0x200000;
TODO:
clean up ID, namingcontainer things:
A control can be added into page hierarchy in the following ways
- newly created in template
- manual ID
- need automatic ID
- dynamically created in code
- manual ID
- need automatic ID
- a previously removed control
- manual ID
- need automatic ID
When a control changes its ID, the following things are necessary:
- If it is a namingContainer
- all its descendant must update their unique ID
- If it is a normal control, nothing needs to be done
- In both cases, the namingContainer's nametable has to be updated
When a control changes its page, ...?
- All its children have to change the page too
When a control changes its parent, ...?
- This is like remvoedControl + addedControl.
When a control changes its namingcontainer ...?
- All its child controls have to change namingcontainer recursively
The old namingContainer nametable must also be changed recursively.
When a control changes its templateControl...??
- Nothing to be done.
ControlState
============
Constructed
Initialized
ViewStateLoaded
Loaded
PreRendered
asp.net 2.0 lifecycles
========================
Application: BeginRequest
Application: PreAuthenticateRequest
Application: AuthenticateRequest
Application: PostAuthenticateRequest
Application: PreAuthorizeRequest
Application: AuthorizeRequest
Application: PostAuthorizeRequest
Application: PreResolveRequestCache
Application: ResolveRequestCache
Application: PostResolveRequestCache
Application: PreMapRequestHandler
Page: Construct
Application: PostMapRequestHandler
Application: PreAcquireRequestState
Application: AcquireRequestState
Application: PostAcquireRequestState
Application: PreRequestHandlerExecute
Page: AddParsedSubObject
Page: CreateControlCollection
Page: AddedControl
Page: AddParsedSubObject
Page: AddedControl
Page: ResolveAdapter
Page: DeterminePostBackMode
Page: PreInit
Control: ResolveAdapter
Control: Init
Control: TrackViewState
Page: Init
Page: TrackViewState
Page: InitComplete
Page: LoadPageStateFromPersistenceMedium
Control: LoadViewState
Page: EnsureChildControls
Page: CreateChildControls
Page: PreLoad
Page: Load
Control: DataBind
Control: Load
Page: EnsureChildControls
Page: LoadComplete
Page: EnsureChildControls
Page: PreRender
Control: EnsureChildControls
Control: PreRender
Page: PreRenderComplete
Page: SaveViewState
Control: SaveViewState
Page: SaveViewState
Control: SaveViewState
Page: SavePageStateToPersistenceMedium
Page: SaveStateComplete
Page: CreateHtmlTextWriter
Page: RenderControl
Page: Render
Page: RenderChildren
Control: RenderControl
Page: VerifyRenderingInServerForm
Page: CreateHtmlTextWriter
Control: Unload
Control: Dispose
Page: Unload
Page: Dispose
Application: PostRequestHandlerExecute
Application: PreReleaseRequestState
Application: ReleaseRequestState
Application: PostReleaseRequestState
Application: PreUpdateRequestCache
Application: UpdateRequestCache
Application: PostUpdateRequestCache
Application: EndRequest
Application: PreSendRequestHeaders
Application: PreSendRequestContent
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