绑定属性设置器未被调用(Bound Property Setter not getting Called)

 我遇到以下情况的问题（为简洁起见，代码剪切）。 基本上，当设置依赖项属性时，我的用户控件属性的Setter没有被调用，我需要解决这个问题。 
 
 我在View.xaml中有以下代码 
 
<Filter:Filter x:Name="ProductFilter" PrimaryItemSource="{Binding CarrierProducts}"  />
 
 在View.xaml.cs中 
 
    public ProductPricing()
    {
        InitializeComponent();

        ViewModel.Filter.ProductPricing vm = new ViewModel.Filter.ProductPricing();
        this.DataContext = vm;
    }
 
 在我的ViewModel中，我公开了一个属性 
 
    public ObservableCollection<Model.FilterItem> _carrierProducts;
    public ObservableCollection<Model.FilterItem> CarrierProducts
    {
        get
        {
            return _carrierProducts;
        }
        set
        {
            if (_carrierProducts != value)
            {
                _carrierProducts = value;
                RaisePropertyChanged("CarrierProducts");
            }
        }
    }
 
 最后，过滤器用户控件的定义如下。 
 
   public static readonly DependencyProperty PrimaryItemSourceProperty =
        DependencyProperty.Register("PrimaryItemSource", typeof(ObservableCollection<Model.FilterItem>), typeof(Filter), new PropertyMetadata(null));

    public ObservableCollection<Model.FilterItem> PrimaryItemSource
    {
        get
        {
            return (ObservableCollection<Model.FilterItem>)GetValue(PrimaryItemSourceProperty);
        }

        set
        {
            SetValue(PrimaryItemSourceProperty, value);

            ComboBox combo = _filters.ElementAt(0);
            FilterSourceChange(combo, value);
        }
    }
 
 由于某种原因，设置了PrimaryItemSource属性，但未调用Setter。 我是否必须向PropertyMetadata对象添加一个PropertyChange事件来处理这个问题，因为这似乎是很多简单的代码。 

I have a problem with the following scenario (code cut for brevity). Basically the Setter of my User Control Property isn't being called when the dependency property is set and I need to get around this.
 
I have the following code in my View.xaml
 
<Filter:Filter x:Name="ProductFilter" PrimaryItemSource="{Binding CarrierProducts}"  />
 
In the View.xaml.cs 
 
    public ProductPricing()
    {
        InitializeComponent();

        ViewModel.Filter.ProductPricing vm = new ViewModel.Filter.ProductPricing();
        this.DataContext = vm;
    }
 
In my ViewModel I expose a property
 
    public ObservableCollection<Model.FilterItem> _carrierProducts;
    public ObservableCollection<Model.FilterItem> CarrierProducts
    {
        get
        {
            return _carrierProducts;
        }
        set
        {
            if (_carrierProducts != value)
            {
                _carrierProducts = value;
                RaisePropertyChanged("CarrierProducts");
            }
        }
    }
 
Finally the Filter User control is defined like so.
 
   public static readonly DependencyProperty PrimaryItemSourceProperty =
        DependencyProperty.Register("PrimaryItemSource", typeof(ObservableCollection<Model.FilterItem>), typeof(Filter), new PropertyMetadata(null));

    public ObservableCollection<Model.FilterItem> PrimaryItemSource
    {
        get
        {
            return (ObservableCollection<Model.FilterItem>)GetValue(PrimaryItemSourceProperty);
        }

        set
        {
            SetValue(PrimaryItemSourceProperty, value);

            ComboBox combo = _filters.ElementAt(0);
            FilterSourceChange(combo, value);
        }
    }
 
For some reason the PrimaryItemSource property is set but the Setter doesn't get called. Do I have to add a PropertyChange event to the PropertyMetadata object to handle this as that seems like a lot of code for something simple.

原文：https://stackoverflow.com/questions/2237981