EnableViewState strange behaviour ???

[Chris Peeters]

Hi,

I have a listBox listed with colornames and a panelcontrol that takes
the color of selecteditem from the listbox whenever I click a different
item:

protected void lstColors_SelectedIndexChanged(object sender, EventArgs
e)
{
pnlColor.BackColor =
Color.FromName(lstColors.SelectedItem.Value);
}

The panelcontrol draws correctly whenever I click in the listbox but
when I click on another button on the webform the panelcontrol looses
its color although EnableViewState is set to true for the panelcontrol.

Its only when I set the EnableViewState of the listBox to false that the
panelcontrol keeps its state (no matter what the EnableViewState of the
panelcontrol is set to) ???

how do you explain this strange behavior ?

thank you
Chris

 

[Eliyahu Goldin]

The panelcontrol draws correctly whenever I click in the listbox but

when I click on another button on the webform the panelcontrol looses
its color although EnableViewState is set to true for the panelcontrol.

Do you set the panel in some initial color in the Page_Load event? Do you
check IsPostBack property before doing that?

Its only when I set the EnableViewState of the listBox to false that the
panelcontrol keeps its state (no matter what the EnableViewState of the
panelcontrol is set to) ???

Setting EnableViewState to false disables firing events. Check if you have
any event handling code that could cause this behavior.