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 16,706 Reputation points Microsoft Vendor

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.

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PropertyChanged is null in winui3.0