INotifyPropertyChanged 用于属性的属性

发布于 2024-12-11 14:00:20 字数 663 浏览 0 评论 0原文

我认为描述这个问题的最好方法是用一个非常简单的例子......

想象一下你有两个类。称它们为Train 和Status。

在 Train 的 DomainService 中，有一行如下所示：

[Include]
public Status { get; set;}

Status 有两个属性：Name 和 <代码>显示颜色。

现在，将 Train 对象的 ObservableCollection 绑定到 DataGrid
绑定 Status 的 ObservableCollection > 到另一个 DataGrid。
然后更新 Status 对象之一。
有没有办法让此更改自动反映在保存Train对象的DataGrid中？

谢谢！

原文

I think the best way to describe this question is with a very simple example....

Imagine that you have two classes. Call them Train and Status.

In the DomainService for Train you have a line that looks like:

[Include]
public Status { get; set;}

The Status has two properties: Name and DisplayColor.

Now, bind an ObservableCollection of Train objects to a DataGrid
Bind an ObservableCollection of Status to another DataGrid.
Then update one of the Status objects.
Is there any way to make this change reflect automatically in the DataGrid holding the Train objects?

Thank you!!!

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我要还你自由 2024-12-18 14:00:20

我认为这就是您想要的（假设服务和 Status 都实现 INotifyPropertyChanged）：

private Status _status;

[Include]
public Status Status
{
  get { return _status; }
  set 
  {
    if (_status == value) return;

    if (_status != null)
       _status.PropertyChanged -= NotifyStatusChanged;

    _status = value;

    // Whatever your implementation of INotifyPropertyChanged looks like.
    RaiseNotifyPropertyChanged(()=> Status);

    if (_status != null)
       _status.PropertyChanged += NotifyStatusChanged;
  }
}

private void NotifyStatusChanged(object o, EventArgs e) 
{
    // Whatever your implementation of INotifyPropertyChanged looks like.
    RaiseNotifyPropertyChanged(()=> Status);
}

I think this is what you want (assuming both the service and Status implement INotifyPropertyChanged):

private Status _status;

[Include]
public Status Status
{
  get { return _status; }
  set 
  {
    if (_status == value) return;

    if (_status != null)
       _status.PropertyChanged -= NotifyStatusChanged;

    _status = value;

    // Whatever your implementation of INotifyPropertyChanged looks like.
    RaiseNotifyPropertyChanged(()=> Status);

    if (_status != null)
       _status.PropertyChanged += NotifyStatusChanged;
  }
}

private void NotifyStatusChanged(object o, EventArgs e) 
{
    // Whatever your implementation of INotifyPropertyChanged looks like.
    RaiseNotifyPropertyChanged(()=> Status);
}

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