Dynamically adding controls from an Event after Page_Init
- by GenericTypeTea
Might seem like a daft title as you shouldn't add dynamic controls after Page_Init if you want to maintain ViewState, but I couldn't think of a better way of explaining the problem.
I have a class similar to the following:
public class WebCustomForm : WebControl, IScriptControl
{
internal CustomRender Content
{
get
{
object content = this.Page.Session[this.SESSION_CONTENT_TRACKER];
return content as CustomRender;
}
private set
{
this.Page.Session[this.SESSION_CONTENT_TRACKER] = value;
}
}
}
CustomRender is an abstract class that implements ITemplate that I use to self-contain a CustomForms module I'm in the middle of writing.
On the Page_Init of the page that holds the WebCustomForm, I Initialise the control by passing the relevant Ids to it. Then on the overridden OnInit method of the WebCustomForm I call the Instantiate the CustomRender control that's currently active:
if (this.Content != null)
{
this.Content.InstantiateIn(this);
}
The problem is that my CustomRender controls need the ability to change the CustomRender control of the WebCustomForm. But when the events that fire on the CustomRender fire, the Page_Init event has obviously already gone off. So, my question is, how can I change the content of the WebCustomForm from a dynamically added control within it?
The way I see it, I have two options:
I separate the CustomRender controls
out into their own stand alone
control and basically have an aspx
page per control and handle the
events myself on the page (although
I was hoping to just make a control
I drop on the page and forget about)
I don't use events and just keep
requesting the current page, but
with different Request Parameters Or
I go back to the drawing board with
any better suggetions anyone can
give me.
