Help on changing Text value

[Saiyed Alam]

Hello friends I have a Observable collection in my wpf window. There is a textblock in my window which text initially should be "No Message yet" (when Observable collection is empty). What I need to do is to set the text value of that textblock to " " when Observable collection changes (count becomes > 0) how Can I do this.? Any help or hints would be highly appreciated. Thanking in Advance Johnny

[Michel Godfroid]

Subscribe to the CollectionChanged event, and set your text accordingly

[Saiyed Alam]

Yes I understand I can do this using event aggregator. but I was wondering if it can be done using trigger in xaml. If it's possible plz let me know. Thanking again Johnny

[Michel Godfroid]

Post in the C# forum, get a C# answer! Excellent tutorial on triggers at A Guided Tour of WPF – Part 4 (Data templates and triggers)[^]