C# 使用WPF工具包绑定饼图时不显示点

我有一个piechart，我定义如下：

        <chartingToolkit:Chart DataContext="1,10 2,20 3,30 4,40" 
                           HorizontalAlignment="Left" Margin="334,238,0,0" 
                           Name="chart1"  VerticalAlignment="Top" Height="177"
                           Width="218" BorderBrush="#00000000">
        <chartingToolkit:PieSeries 
        ItemsSource="{Binding PieCollection}"
        IndependentValueBinding="{Binding Path=Name}"
        DependentValueBinding="{Binding Path=Share}" />
    </chartingToolkit:Chart>

所以没问题。我在ViewModel中声明了一个数据集：

 private ObservableCollection<PiePoint> _pieCollection;
 public ObservableCollection<PiePoint> PieCollection { get { return _pieCollection; } set { _pieCollection = value; OnPropertyChanged("PieCollection"); } }

当我在构造函数中启动ViewModel时，我在此处添加了一些测试数据点，以查看是否可以在图表中获得一些数据：

    PieCollection = new ObservableCollection<PiePoint>();
    PieCollection.Add(new PiePoint { Name = "Mango", Share = 10 });
    PieCollection.Add(new PiePoint { Name = "Banana", Share = 36 });

PieCollection=newObservableCollection（）；
添加（新的PiePoint{Name=“Mango”，Share=10}）；
添加（新的PiePoint{Name=“Banana”，Share=36}）；

---

但图表上什么也没有显示。断点命中，我看到了图表的背景，我知道items源绑定到了正确的集合，但我似乎无法让它工作。有什么建议吗？

以下是我使用您的数据得到的：

XAML：

编辑：动态创建

PieCollection

：

public partial class MainWindow : Window
{
    PieCollection pieCollection1;

    public MainWindow()
    {
        InitializeComponent();

        pieCollection1 = new PieCollection();

        pieCollection1.Add(new PiePoint { Name = "Mango", Share = 10 });
        pieCollection1.Add(new PiePoint { Name = "Banana", Share = 36 });
        pieCollection1.Add(new PiePoint { Name = "Grapes", Share = 15 });
        pieCollection1.Add(new PiePoint { Name = "Apple", Share = 20 });

        Chart1.DataContext = pieCollection1;
    }
}

结果:

---

我之所以在后台代码中创建我的PieCollection，是因为这些值是动态变化的。此外，由于它位于viewmodel中，我将无法访问我的饼图对象以保持界面分离。正如我所说，您没有将

PieCollection

分配给

DataContext

。我相应地更新了我的答案。另外，我认为您在XAML中不需要这个：

DataContext=“1,10 2,20 3,30 4,40”

。把它拿出来。

    PieCollection = new ObservableCollection<PiePoint>();
    PieCollection.Add(new PiePoint { Name = "Mango", Share = 10 });
    PieCollection.Add(new PiePoint { Name = "Banana", Share = 36 });

<Grid>
    <chartingToolkit:Chart Margin="0" Title="Chart Title">
        <chartingToolkit:Chart.DataContext>
            <local:PieCollection/>
        </chartingToolkit:Chart.DataContext>
        <chartingToolkit:PieSeries ItemsSource="{Binding Mode=OneWay}" DependentValuePath="Share" IndependentValuePath="Name" DataContext="{Binding Mode=OneWay}" >
        </chartingToolkit:PieSeries>
    </chartingToolkit:Chart>
</Grid>

chart.DataContext = PieCollection

public partial class MainWindow : Window
{
    PieCollection pieCollection1;

    public MainWindow()
    {
        InitializeComponent();

        pieCollection1 = new PieCollection();

        pieCollection1.Add(new PiePoint { Name = "Mango", Share = 10 });
        pieCollection1.Add(new PiePoint { Name = "Banana", Share = 36 });
        pieCollection1.Add(new PiePoint { Name = "Grapes", Share = 15 });
        pieCollection1.Add(new PiePoint { Name = "Apple", Share = 20 });

        Chart1.DataContext = pieCollection1;
    }
}