WPF经典MVVM书写方式

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public partial class DataPageViewModel : ViewModelBase
{
    private string  _title;
    public string Title
    {
        get { return _title; }
        set 
        {
            if (_title != value)
            {
                _title = value;
                OnPropertyChanged(nameof(Title));
            }
        }
    }
}
public class ViewModelBase : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler? PropertyChanged;
    public void OnPropertyChanged(string propertyName)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
}