RefreshPropertiesAttribute不刷新PropertyGrid [英] RefreshPropertiesAttribute does not refresh PropertyGrid

问题描述

RefreshPropertiesAttribute 不能强制刷新PropertyGrid 是否存在已知问题?

我有一个包含PropertyGrid的简单表单.我创建一个对象，并将其提供给PropertyGrid.SelectedObject.我看到显示了该对象的属性.

然后，我单击一个导致该对象的属性之一的值更改的测试按钮.但是，PropertyGrid 不会刷新以显示新值.仅当我单击该属性的网格单元时，它才会刷新.

我用RefreshPropertiesAttribute装饰了该属性，如下所示，但没有效果.

Is there a known problem with the RefreshPropertiesAttribute not being able to force PropertyGrid to refresh?

I have a simple form that contains a PropertyGrid. I create an object, and give it to PropertyGrid.SelectedObject. I see the properties of that object displayed.

I then click a test button that causes the value of one of the object''s properties to change. However, the PropertyGrid does not refresh to display the new value. Only when I click on the grid cell for that property does it refresh.

I decorated the property with the RefreshPropertiesAttribute as follows, but it has no effect.

public class Foo
{
  private bool m_Flag;

  [RefreshProperties( RefreshProperties.All )]
  public bool Flag
  {
    get { return m_Flag; }
    set { m_Flag = value; }
  }
}

我创建了自己的从PropertyGrid 派生的CustomPropertyGrid 类，并覆盖了Refresh().因此，我确定不会调用Refresh() .

I created my own CustomPropertyGrid class that derives from PropertyGrid and overrode Refresh(). Thus, I am certain that Refresh() is not being called.

public class CustomPropertyGrid : System.Windows.Forms.PropertyGrid
{
  public override void Refresh( )
  {
    base.Refresh();
    Debug.WriteLine( "*** Refresh ***" );
  }
}

我的开发环境是:
-Visual Studio 2008
-目标框架= .NET 2.0

感谢所有建议.

My development environment is:
- Visual Studio 2008
- Target Framework = .NET 2.0

Any suggestions are appreciated.

推荐答案

我现在意识到，RefreshPropertiesAttribute仅在PropertyGrid更改对象中的属性值时才起作用.

解决我的问题的方法是:
1.让我的对象实现一个接口，当其属性之一更改时，该接口引发一个特殊事件.例如，INotifyPropertyChanged是DotNet框架提供的标准版本.

2.创建派生的PropertyGrid，该派生的PropertyGrid处理分配给PropertyGrid.SelectedObjects的对象中的特殊事件.
3.在该处理程序中，调用PropertyGrid.Refresh().

I realize now that the RefreshPropertiesAttribute only has an effect when the PropertyGrid changes the value of a property in my object.

The solution to my problem is to:
1. Have my object implement an interface that raises a special event when one of its properties changes. For example, INotifyPropertyChanged is a standard one provided by the DotNet framework.

2. Create a derived PropertyGrid that handles that special event from the objects assigned to PropertyGrid.SelectedObjects.

3. In that handler, call PropertyGrid.Refresh().

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