PropertyChanged is null in winui3.0

jia liang 21

`public sealed partial class MainWindow:Window,INotifyPropertyChanged  
{  
public event PropertyChangedEventHandler PropertyChanged;  
  
public void OnPropertyChanged([callerMemberName]string propertyName="")  
{  
PropertyChanged?.Invoke(propertyName);  
}  
}`

PropertyChanged is null.

Junjie Zhu - MSFT 21,646 Reputation points

2022-08-29T03:16:40.693+00:00
Hello @jia liang ,
Welcome to Microsoft Q&A!

I tested in winui3 that INotifyPropertyChanged worked.
Due to the limited information and code you provided, I need to know the following

Where is your binding data defined?

Where is OnPropertyChanged called?

Please provide relevant information without any personal privacy. Your reply will be greatly appreciated.

Your answer