Question

这是我的基础界面：

public interface IFlowFunctionType
{
    void RefreshAll();
    void ClearAll();
}

这是我实现INotifyPropertyChanged的基类：

    public class ObservableObject : INotifyPropertyChanged
{
    #region INotifyPropertyChanged Members
    [field: NonSerialized]
    public event PropertyChangedEventHandler PropertyChanged;
    #endregion
    #region Protected Methods
    protected void OnPropertyChanged(string name)
    {
        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(name));
        }
    }
    #endregion
}

这个我的类实现上面的接口：

    public class M1 : ObservableObject, ISerializable, IFlowFunctionType
{
    public void GetObjectData(SerializationInfo info, StreamingContext context)
    {// some code}

    public void RefreshAll()
    {// some code }

    public void ClearAll()
    {// some code}
}

请告诉我为什么在 firstInstance 指定 firstInstance firstInstance 的属性时不会激活？

 class Main() { 
        public  Main()
        {
            private M1 firstInstance = new M1();
            private M1 secondInstance = new M1();
            DeQueue(firstInstance);
        }
         public void DeQueue( IFlowFunctionType obj)
         {
            obj= secondInstance ;
            obj.RefreshAll();

            DbQueues.Remove(firstOrDefault);
          }
    }

Answer 1

当您为firstInstance分配secondInstance时，M1的所有属性均未更改。您的对象不知道何时分配它，它只观察它自己的属性。

如果您想观察重新分配，您必须将public class Host : ObservableObject { public M1 Instance {get; set;} } ... var host = new Host(); host.Instance = new M1(); host.Instance = new M1(); // Reassigned, Host will see the change.分配给一个本身可观察的对象。

{{1}}

分配新实例后，INotifyPropertyChanged不起作用

1 个答案: