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原标题:SortDescription with custom attached property

In Xaml I can set a custom attached property using local:TestClass.TestProperty="1"

An I can bind to a custom attached property using {Binding Path=(Namespace:[OwnerType].[PropertyName])} {Binding Path=(local:TestClass.TestProperty)}

But how do I specify the namespace when I need to use a custom attached property in a SortDescription? I can bind to an attached property using new SortDescription("(Grid.Row)", ListSortDirection.Descending) but here I can t set a namespace anywhere...

Best Regards, Jesper

最佳回答

由于<代码>{ 具有约束力的路径=a:b.c} 施工,但<代码>-Bled a:b.c}t: 不动产建筑商没有名称空间。

不幸的是,就Sort Description而言,你可以做很多事情。 你们必须找到一种不使用附属财产的方式。

通常,我告诉人们,使用塔吉是坏编码的一个指标,但在这种情况下,塔吉可能是你的最佳选择: 你可以在塔格内制造一个物品,拥有归还你想要的实际财产的财产。

您的财产 2. 追索,即时 a. 对内产阶级的回顾:

public class TestClass : DependencyObject
{
  ... TestProperty declaration ...
  PropertyChangedCallback = (obj, e) =>
  {
    ...
    if(obj.Tag==null) obj.Tag = new PropertyProxy { Container = obj };
  });

  public class PropertyProxy
  {
    DependencyObject Container;
    public SomeType TestProperty { get { return GetTestProperty(Container); } }
  }
}

现在,你可以在你的描述中使用塔格的次级规定:

<SortDescription PropertyName="Tag.TestProperty" />

如果只有一个单一财产需要分类,那么你就可以简单地为它使用塔格。

这方面的主要问题是,使用塔格财产将与其他试图使用塔格的法典发生冲突。 因此,你可能想在标准图书馆中寻找一些模糊不清的附属财产,这些图书馆甚至对所涉物品适用,而不是使用塔格。

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