Persisting dynamic controls

[dougloj]

Hi,

In my ASP.NET application, I want to be able to dynamically create
RadioButtonLists and/or
CheckBoxLists according to what is in my database. I wrote routines to
create RadioButtonLists and CheckBoxLists. Each routine pulls data out
of my database, populates the respective control, and passes the
control back to the caller. The caller places the returned controls
into a table. The controls are displayed as expected.

However, after a postback is invoked as a result of a selection change
in one of the RadioButtonLists or CheckBoxLists, all of my
dynamically created RadioButtonList and/or CheckBoxLists disappear.

Can anybody please tell me how to prevent the disappearing trick?

Thanks for the bandwidth.

Doug

 

[Teemu Keiski]

You need to add control to Controls collection before populating it. if your
method instantiates the control, populates it, and after that it's added to
Controls collection, state management hasn't been triggered on, and Items
aren't stored to ViewState.

For a list of related references see:
http://aspadvice.com/blogs/joteke/archive/2006/01/06/14568.aspx