初始化后WPF绑定未应用于目标

我正在尝试将序列绑定添加到VisioFire图形控件集。为此,我创建了时间的序列源依赖属性 DataSeriesCollection . 在前端使用以下方法绑定:

`<Chart SeriesSource={Binding Series} />`  

问题
当源更改时,将调用验证回调。传递给它的值是正确的值,填充 ObservableCollection<something> . 在调用validate值后,立即由某个对象调用强制值回调,发送给它的值为空 可观察收集<something> . 任何人只要能:

1. 正确填充 ObservableCollection<someting> 传递到强制值回调或
2. 获取传递给OnSeriessourceChanged回调或
3. 向我解释我如何做到上述任何一点:)

以下是视图的数据模板:

<DataTemplate DataType="{x:Type vm:ReportViewModel}">
    <Grid Name="rootGrid">
    <visifire:Chart Grid.Row="1" SeriesSource="{Binding Series}">
        <visifire:Chart.AxesX>
                <visifire:Axis Title="X axis" />
        </visifire:Chart.AxesX>
        <visifire:Chart.AxesY>
                <visifire:Axis Title="Y axis" />
        </visifire:Chart.AxesY>
    </visifire:Chart>
    </Grid>
</DataTemplate>

这是目标依赖属性

    //Getter and setter for Dependency Property
    public ObservableCollection<DataSeries> SeriesSource
    {
        get { return (ObservableCollection<DataSeries>)GetValue(SeriesSourceProperty); }
        set { SetValue(SeriesSourceProperty, value);           }
    }

    // Using a DependencyProperty as the backing store for SeriesSource.  This enables animation, styling, binding, etc...
    public static readonly DependencyProperty SeriesSourceProperty =
        DependencyProperty.Register("SeriesSource", typeof(ObservableCollection<DataSeries>), typeof(Chart), new UIPropertyMetadata(new ObservableCollection<DataSeries>(), new PropertyChangedCallback(OnSeriesSourceChange), new CoerceValueCallback(CoerceSeries)), new ValidateValueCallback(ValidateSeriesSource));

    //Value validation callback
    private static bool ValidateSeriesSource(object value)
    {
        if (value as ObservableCollection<DataSeries> != null)
            return true;
        return false;
    }

    //Dependency Property Changed callback
    private static void OnSeriesSourceChange(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        Chart c = d as Chart;
        if (c == null)
            return;
        //This line was causing the issue. It was overriding the setter
        c.SeriesSource = (DataSeriesCollection)e.NewValue;
    }

    //Coerce Value callback
    private static object CoerceSeries(DependencyObject d, object value)
    {
        Chart c = d as Chart;
        var collection = value as System.Collections.ObjectModel.ObservableCollection<Visifire.Charts.DataSeries>;
        foreach (var item in c.Series)
        {
            if (!collection.Contains(item))
                c.Series.Remove(item);
        }
        foreach (var item in collection)
        {
            if (!c.Series.Contains(item))
                c.Series.Add(item);
        }
        return collection;
    }

新信息
强制值回调接收的值始终是该属性设置为的第一个值。因此,如果我传递的第一个值是一个包含1个项的列表,它将始终强制值返回包含一个项的列表!

编辑:发现问题,它在属性更改回调中。马特帮助我完成了强制回拨。