财产登记为的DependencyProperty [英] Register Property as DependencyProperty

问题描述

我有一个名为ChartView用户控件。在那里，我有类型的ObservableCollection的属性。我已经在ChartView实施INotifyPropertyChanged的

I have a UserControl called ChartView. There I have a Property of type ObservableCollection. I have implemented INotifyPropertyChanged in the ChartView.

对于ChartEntry的代码是：

The code for a ChartEntry is:

public class ChartEntry
{
   public string Description { get; set; }
   public DateTime Date { get; set; }
   public double Amount { get; set; }
}

现在我想用另一种观点认为这种控制和设置的的ObservableCollection通过数据绑定的ChartEntries。如果我尝试做它用：

Now I want to use this Control in another View and setting the ObservableCollection for the ChartEntries through DataBinding. If I try to just do it with:

<charts:ChartView ChartEntries="{Binding ChartEntriesSource}"/>

我得到在XAML窗口，我不能绑定到非依赖属性的消息或不依赖对象。

I get a message in the xaml-window that I can not bind to a non-dependency-property or non-dependency-object.

我试图注册的ObservableCollection为DependencyProperty的，但没有成功。
我从 WPF教程

I tried to register the ObservableCollection as a DependencyProperty, but with no success. I tried it with the code from WPF Tutorial

我对附加-属性代码

 public static class ChartEntriesSource
    {
        public static readonly DependencyProperty ChartEntriesSourceProperty =
            DependencyProperty.Register("ChartEntriesSource",
                                                typeof(ChartEntry),
                                                typeof(ChartView),
                                                new FrameworkPropertyMetadata(OnChartEntriesChanged));

        private static void OnChartEntriesChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {

        }

        public static void SetChartEntriesSource(ChartView chartView, ChartEntry chartEntries)
        {
            chartView.SetValue(ChartEntriesSourceProperty, chartEntries);
        }

        public static ChartEntry GetChartEntriesSource(ChartView chartView)
        {
            return (ChartEntry)chartView.GetValue(ChartEntriesSourceProperty);
        }
    }

这也没有工作。
我如何注册我的财产作为DependencyProperty的？

This also didn't work. How do I register my Property as a DependencyProperty?

推荐答案

您似乎是一个之间有些困惑 AttachedProperty 和的DependencyProperty 。忘掉你的 ChartEntriesSource 类...相反，添加此的DependencyProperty 到 ChartView 控制应该做的伎俩：

You seem to be somewhat confused between an AttachedProperty and a DependencyProperty. Forget about your ChartEntriesSource class... instead, adding this DependencyProperty into your ChartView control should do the trick:

public static readonly DependencyProperty ChartEntriesProperty = DependencyProperty.
Register("ChartEntries", typeof(ObservableCollection<ChartEntry>), typeof(ChartView));

public ObservableCollection<ChartEntry> ChartEntries
{
    get { return (ObservableCollection<ChartEntry>)GetValue(ChartEntriesProperty); }
    set { SetValue(ChartEntriesProperty, value); }
}

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