Initialize Textblock after changing Inlines [modified]

[Defender NF]

Hello everyone Since Inlines (CollectionInlines) arnt a dependencyproperty i made a TextBox with dependency Inlines, the Code:

public InlineCollection InlineCollection
{
get
{
return (InlineCollection)GetValue(InlineCollectionProperty);
}
set
{
SetValue(InlineCollectionProperty, value);
}
}

    public static readonly DependencyProperty InlineCollectionProperty = DependencyProperty.Register(
        "InlineCollection",
        typeof(InlineCollection),
        typeof(InlineTextBlock),
            new UIPropertyMetadata((PropertyChangedCallback)((sender, args) =>
            {
                InlineTextBlock textBlock = sender as InlineTextBlock;

                if (textBlock != null)
                {


                    textBlock.Inlines.Clear();

                    InlineCollection inlines = args.NewValue as InlineCollection;
                    InlineCollection oldinlines = args.OldValue as InlineCollection;

                    if (inlines != null)
                    {
                        textBlock.Inlines.AddRange(inlines.ToList());
                    }

                    else

                        textBlock.Inlines.AddRange(oldinlines.ToList());
                        
                        
                    
                }
            })));

The TextBlock has normally some text after that it gets new inlines, if the Inlines it gets are empty it should get its first(default) text again. Now the Problem: if it had a the first a text via Inlines then everything is ok coz i can get them again with the oldvalue, if it has a the first normal text with no inlines then the textblock doesnt show nothing because of: textBlock.Inlines.AddRange(oldinlines.ToList()); (no oldvalue of the Inlines) how can i set the first text at the ende if in this case? any ideas? Thanks in Advance. Cheers Def.

modified on Tuesday, April 12, 2011 9:02 AM