internal void ExtenderResetValue(IExtenderProvider provider, object component, PropertyDescriptor notifyDesc)
{
if (DefaultValue != s_noValue)
{
ExtenderSetValue(provider, component, DefaultValue, notifyDesc);
}
else if (AmbientValue != s_noValue)
{
ExtenderSetValue(provider, component, AmbientValue, notifyDesc);
}
else if (ResetMethodValue != null)
{
ISite site = GetSite(component);
IComponentChangeService changeService = null;
object oldValue = null;
object newValue;
// Announce that we are about to change this component
//
if (site != null)
{
changeService = (IComponentChangeService)site.GetService(typeof(IComponentChangeService));
Debug.Assert(!CompModSwitches.CommonDesignerServices.Enabled || changeService != null, "IComponentChangeService not found");
}
// Make sure that it is ok to send the onchange events
//
if (changeService != null)
{
oldValue = ExtenderGetValue(provider, component);
try
{
changeService.OnComponentChanging(component, notifyDesc);
}
catch (CheckoutException coEx)
{
if (coEx == CheckoutException.Canceled)
{
return;
}
throw coEx;
}
}
provider = (IExtenderProvider)GetInvocationTarget(_componentClass, provider);
if (ResetMethodValue != null)
{
ResetMethodValue.Invoke(provider, new object[] { component });
// Now notify the change service that the change was successful.
//
if (changeService != null)
{
newValue = ExtenderGetValue(provider, component);
changeService.OnComponentChanged(component, notifyDesc, oldValue, newValue);
}
}
}
}