WPF餅圖 - 切片不顯示在圖表上

Question

我正在嘗試使用WPF餅圖。問題是隻有最後一片保持顯示。我可以看到所有切片都顯示並且立即隱藏，除了最後一個。任何想法 ？

<Window x:Class="ScrumApp01.WindowGraphique" 
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" 
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" 
    xmlns:chartingToolkit="clr-namespace:System.Windows.Controls.DataVisualization.Charting;assembly=System.Windows.Controls.DataVisualization.Toolkit" 
    xmlns:DV="clr-namespace:System.Windows.Controls.DataVisualization;assembly=System.Windows.Controls.DataVisualization.Toolkit" 
    xmlns:DVC="clr-namespace:System.Windows.Controls.DataVisualization.Charting;assembly=System.Windows.Controls.DataVisualization.Toolkit" 
    xmlns:local="clr-namespace:ScrumApp01" 
    Title="Fenêtre graphiques SCRUM" Height="674" Width="1216" ResizeMode="CanResizeWithGrip" Name="GraphicScrum01"> 

<DVC:Chart Margin="25,268,0,0" Title="Pointe de tarte" LegendTitle="Les datas" Background="LightSteelBlue" HorizontalAlignment="Left" VerticalAlignment="Top" Height="324" Width="307"> 
<DVC:PieSeries Title="Les datas en tarte" Name="Tarte2" 
    ItemsSource="{StaticResource FruitCollection2}" 
    IndependentValueBinding="{Binding Path=sss}" 
    DependentValueBinding="{Binding Path=nnn}" > 
</DVC:PieSeries> 

private void button3_Click(object sender, RoutedEventArgs e) 
{ 
    FruitCollection2 fff = new FruitCollection2(); 
    fff.Clear(); 
    fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[0], bbb = 1, ddd = 10, sss = "Item a" }); 
    fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[1], bbb = 2, ddd = 9, sss = "Item b" }); 
    fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[2], bbb = 3, ddd = 11, sss = "Item c" }); 
    fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[3], bbb = 1, ddd = 14, sss = "Item d" }); 
    fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[4], bbb = 4, ddd = 7, sss = "Item e" }); 
    fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[5], bbb = 5, ddd = 1, sss = "Item f" }); 
    fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[6], bbb = 6, ddd = 7, sss = "Item g" }); 
    fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[7], bbb = 3, ddd = 6, sss = "Item h" }); 
    fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[8], bbb = 3, ddd = 7, sss = "Item i" }); 
    fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[9], bbb = 4, ddd = 5, sss = "Item j" }); 


    this.Tarte2.ItemsSource = fff; 

} 

Answer 1

你在你的圖表設置的ItemsSource的方式很奇怪。這樣做，這樣應該工作：

在定義的類sss通過{Binding Path=sss}（基本上DVC的DataContext的：PieSeries將）被稱爲，聲明這個屬性：

private ObservableCollection<Fruit02> mFff = new ObservableCollection<Fruit02>(); 
public ObservableCollection<Fruit02> fff 
{ 
    get { return mFff; } 
} 

然後綁定您的DVC：PieSeries將的ItemSource像這樣：

<DVC:PieSeries Title="Les datas en tarte" Name="Tarte2" 
    ItemsSource="{Binding Path=fff}" 
    IndependentValueBinding="{Binding Path=sss}" 
    DependentValueBinding="{Binding Path=nnn}" > 
</DVC:PieSeries> 

然後在點擊處理，不創建一個新的集合，只需要修改現有的一個：

private void button3_Click(object sender, RoutedEventArgs e) 
    { 
     fff.Clear(); 
     fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[0], bbb = 1, ddd = 10, sss = "Item a" }); 
     fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[1], bbb = 2, ddd = 9, sss = "Item b" }); 
     fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[2], bbb = 3, ddd = 11, sss = "Item c" }); 
     fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[3], bbb = 1, ddd = 14, sss = "Item d" }); 
     fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[4], bbb = 4, ddd = 7, sss = "Item e" }); 
     fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[5], bbb = 5, ddd = 1, sss = "Item f" }); 
     fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[6], bbb = 6, ddd = 7, sss = "Item g" }); 
     fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[7], bbb = 3, ddd = 6, sss = "Item h" }); 
     fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[8], bbb = 3, ddd = 7, sss = "Item i" }); 
     fff.Add(new Fruit02 { nnn = this.data001.listeNombres03[9], bbb = 4, ddd = 5, sss = "Item j" }); 
    } 

假設您的DataContext設置正確，並且您的餅圖控件正確實施，這應該可以工作。