Viewstate of dynamically created controls

[yufufi]

My web page contains only a panel control and I add datagrids at runtime.
Viewstate for the datagrids are enabled but every time I postback the page I
have to re bind data to data grids.
I figured out this: (?)
when I do a postback , asp.net looks to the html of the page and can't find
the datagrids. It finds only the panel and loads its state ?

everything is ok until this point .. but ,
my datagrids are not visible at the beginning. I also add buttons to the
page (at run time) . When user clicks to the button I change the visible
property of the datagrid to true. Interesting thing is when user clicks to
another button the first datagrid stays visible. (on page load I change the
datagrids' visible property to false)
Actually this is something I want but I can't understand how does asp.net
figures out which datagrid is visible and which is not ?? If it can remember
that why can't it remember the datagrids on the page ?

Thanx a lot
yufufi,

PS there is no ispostback check on the page.. so only thing different
between postbacks is state.

 

[yufufi]

I found this on the web
http://www.tek-tips.com/gviewthread.cfm/pid/855/qid/870851

A programmer says
(yes, the reconstructed controls WILL load their old properties from the
ViewState).

this explains why visible datagrids stay visible , but why do I have to
reload their data ???

 

[Teemu Keiski]

Understanding ASP.NET ViewState
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dnaspp/html/viewstate.asp