WPF与InotifyPropertychanged结合到自定义类

发布于 2025-02-09 17:22:08 字数 477 浏览 1 评论 0原文

我正在处理WPF应用程序，我尝试在更改儿童属性时通知父类。类关系如上图：

class Class1
{
    Class2 c2;
    private void OnPropertyChanged()
    {
        // Do someting When Class3.Property is changed
    }
}

class Class2
{
    Class3 c3;
}

class Class3
{
     string Property
     {
         get {...}
         set
         {
          ...
          PropertyChanged();
         } 
     }
}

我知道为此目的有InotifyPropertychanged，但是我只发现了它用于绑定.xAML文件的情况。是否有任何方法可以将自定义类绑定，或者与类似的事情结合

原文

Im working on a wpf application and I try to notify Parent class when Child's property is changed. Classes relations look like above:

class Class1
{
    Class2 c2;
    private void OnPropertyChanged()
    {
        // Do someting When Class3.Property is changed
    }
}

class Class2
{
    Class3 c3;
}

class Class3
{
     string Property
     {
         get {...}
         set
         {
          ...
          PropertyChanged();
         } 
     }
}

I know that there is INotifyPropertyChanged for this purposes, but I've found only the cases where it is used for binding .xaml files. Is there any way to bind custom classes with it, or with similar thing

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乱了心跳 2025-02-16 17:22:08

除非目标是dependencyObject（对于非GUI相关类是很少见的），否则您无法绑定简单的类。

如果您需要简单的通知，通常会为特定属性或属性实施事件：

class ClassA
{
  public ClassA()
  {
    var classB = new ClassB();
    classB.Activated += OnActivated;
  }

  private void OnActivated(object sender, EventArgs e)
  {
    // Handle event
  }
}

class ClassB
{
  public bool IsActivated 
  { 
    get => this.isActivated; 
    private set
    {
      this.isActivated = value;
      if (this.IsActivated)
      {
        OnActivated();
      }
      else
      {
        OnDeactivated();
      }
    }
  }

  public event EventHandler Activated;
  public event EventHandler Deactivated;

  private void OnActivated()
    => this.Activated?.Invoke();

  private void OnDeactivated()
    => this.Deactivated?.Invoke();
}

You can't bind simple classes unless the target is a DependencyObject (which is quite uncommon for non GUI related classes).

If you need simple notification, you would usually implement an event for the particular property or properties:

class ClassA
{
  public ClassA()
  {
    var classB = new ClassB();
    classB.Activated += OnActivated;
  }

  private void OnActivated(object sender, EventArgs e)
  {
    // Handle event
  }
}

class ClassB
{
  public bool IsActivated 
  { 
    get => this.isActivated; 
    private set
    {
      this.isActivated = value;
      if (this.IsActivated)
      {
        OnActivated();
      }
      else
      {
        OnDeactivated();
      }
    }
  }

  public event EventHandler Activated;
  public event EventHandler Deactivated;

  private void OnActivated()
    => this.Activated?.Invoke();

  private void OnDeactivated()
    => this.Deactivated?.Invoke();
}

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