c# – INotifyPropertyChanged的OnPropertyChanged参数

public class SampleModel : INotifyPropertyChanged
{
    private string _name;

    public string Name
    {
        get { return _name; }
        set
        {
            if (value == _name) return;
            _name = value;
            // Version 1
            OnPropertyChanged();
            // Version 2
            OnPropertyChanged(nameof(Name));
        }
    }

    #region INotifyPropertyChanged members
    public event PropertyChangedEventHandler PropertyChanged;

    [NotifyPropertyChangedInvocator]
    protected virtual void OnPropertyChanged([CallerMemberName] string propertyName = null)
    {
        PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propertyName));
    }
    #endregion
}

为什么我会选择版本1而不是版本2,反之亦然？

OnPropertyChanged(nameof(Name));显式地将属性名称作为输入参数发送到方法.

因此,在您的情况下,两次调用将导致完全相同的PropertyChanged调用.

但是,如果在方法中更改_name或类似的东西,并且希望通知订阅者,则显式调用很有用.