Silverlight: VisualStateManager.GetVisualStateGroups doesn't, How can I get them?
I've tried using VisualStateManager.GetVisualStateGroups
in the OnAttached
override of my custom behavior, as well as in an event handler added to AssociatedObject.Loaded
event in that behavior. Both times I get an empty list.
Is there another way to get the visual state groups defined for a control, or another event handler I should attach to?
Be for it's asked, yes, the control has Vis开发者_如何学运维ualStateGroups
and VisualStates
.
Based on Anthony's answer. Here I give an example for Metro App.
public VisualState GetCurrentState(string stateGroupName)
{
VisualStateGroup stateGroup1 = null;
IList<VisualStateGroup> list = VisualStateManager.GetVisualStateGroups(VisualTreeHelper.GetChild(this, 0) as FrameworkElement);
foreach (var v in list)
if (v.Name == stateGroupName)
{
stateGroup1 = v;
break;
}
return stateGroup1.CurrentState;
}
Usually the VisualStateGroups
attached property is attached to the top level FrameworkElement
in the control's ControlTemplate
. Hence to retrieve this value you may need to use the VisualTreeHelper
to get the first child of the control and see if that has a VisualStateGroups
property.
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