CompositeDataBoundControl concept doubt

Question

User-1824576983 posted
Hello,

I'm trying to code a custom server control that inherits from CompositeDataBoundControl but I think I'm missing some concept here.

My problem is the following: when page posts back, this is what I think is happening

LoadState
...
CreateChildControls
...
PreRender
...
SaveState

So the child controls properly save their state. Depending on some page states, I have to modify some properties of the child controls
(for instance hide some controls, change colors, etc.), but so far everything is okay.
The thing I don't understand is that it's possible the datasource object is modified due to an event in the page. So now I need to rebind
the compositeControl. But in doing so, I loose all the state of childcontrols:

LoadState
...
CreateChildControls
...
Modify ChildControl Properties
...
Modify DataSource object
...
CreateChildControls (dataBinding = true). The thing here is that no LoadControlState/SaveControlState is called, so I loose child
controls states and replace by defaults
...
SaveState

How do I keep my childcontrols state? What's the missing piece of this model?

Thanks in advance.

Answer 1

User-16411453 posted

 No, you have the sequence incorrect.

 Peter Butcher posted the load chart in one of his post withing the last 30 days. You can private message him for the link, or click on his name and hunt it down.
 

I think this is more correct, I don't know about the correct states, but I think it's after OnInit

OnInit

Load State 

CreateChildControls

OnLoad

Render - Paint the control to the screen, or generate asp.net web markup

SaveState 

Answer 2

User481221548 posted

Hi there

@jkirkerx
Peter Bucher :-)

@liandrillo
Look at the MS Sites on this Link:

• http://www.google.ch/search?hl=de&q=asp.net+lifecycle&meta=

And also this picture that shows the most used steps in the cycle:

• http://www.aspnetzone.de/photos/peterbucher/images/182900/original.aspx

There are also Methods where called more than once and depending on some properties of your Control. CreateChildControls is such a Method.

Answer 3

User-16411453 posted

Peter,

Thanks for the assist on the post. I knew you were out there somewhere!

Kirker