StateBag and Custom Controls

[drs9222]

Lets pretend that for some reason I want to create a custom control that is derived from Control and not WebControl. Let us also assume that I need to process attributes (i.e. implement IAttributeAccessor) and that I want to do so by using an AttributeCollection just like WebControl does.

WebControl implements the Attributes property like this:

public AttributeCollection Attributes
{
    get
    {
        if (this.attrColl == null)
        {
            if (this.attrState == null)
            {
                [red]this.attrState = new StateBag(true)[/red];
                if (base.IsTrackingViewState])
                {
                    [red]this.attrState.TrackViewState()[/red];
                }
            }
            this.attrColl = new AttributeCollection([red]this.attrState[/red]);
        }
        return this.attrColl;
    }
}

Note the following:
[ul]
[li]You cannot create an AttributeCollection without giving it a StateBag.[/li]
[li]We have to create a new StateBag. It is not wise to reuse the controls StateBag because an attribute may have the name as a value stored by the control.[/li]
[li]We cannot call TrackViewState on the StateBag because this is an internal method.[/li]
[li]StateBag is a sealed class.[/li]
[/ul]

So as I understand it if I want to use an AttributeCollection I have to use a new StateBag which can never (without resorting to tricks like reflection) actually manage state correctly.

Am I missing something?

 

[drs9222]

Thanks to womp at StackOverflow for setting me straight...