c# - 调用 INotifyPropertyChanged 的​​ PropertyChanged 事件的最佳方式是什么？

Question

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Answer 1

实际上，每个属性只有 3-4 行；其他行在所有“通知”属性上摊销:

class Person : INotifyPropertyChanged
{
    #region INotifyPropertyChanged: Shared bit
    public event PropertyChangedEventHandler PropertyChanged;

    private void OnPropertyChanged(PropertyChangedEventArgs e)
    {
        if (PropertyChanged != null)
            PropertyChanged(this, e);
    }
    #endregion

    private string _firstName;
    public string FirstName
    {
        get { return _firstName; }
        set
        {
            if (_firstName == value)
                return;
            _firstName = value;
            OnPropertyChanged(new PropertyChangedEventArgs("FirstName"));
        }
    }

    // Ditto for other properties
}

您可以尝试类似以下的方法，它会分担更多的负载:

private string _firstName;
public string FirstName
{
    get { return _firstName; }
    set { SetNotifyingProperty("FirstName", ref _firstName, value); }
}
private void SetNotifyingProperty<T>(string propertyName,
                                     ref T field, T value)
{
    if (value.Equals(field))
        return;
    field = value;
    OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
}