protected virtual void OnCloseRequested(CloseEventHandlerArgs args)
{
RequestCloseEventHandler handler = CloseRequested;
if (handler != null)
{
handler(this, args);
}
}
protected override void OnCloseRequested(CloseEventHandlerArgs args)
{
if (CollectionModified)
{
MessageBoxResult result = MessageBox.Show(
"Do you want to save the changes before closing?", "Save changes",
MessageBoxButton.YesNoCancel, MessageBoxImage.Question);
switch (result)
{
case MessageBoxResult.Cancel:
return;
case MessageBoxResult.Yes:
Save();
break;
case MessageBoxResult.No:
Restore();
break;
}
}
base.OnCloseRequested(args);
}