隐藏多个数据系列的WPF工具包图表的图例

Question

我想从WPF工具包（使用LineSeries）使用图表，我根本不需要图例。我需要这个，因为我有10个这样的图表，每个都有来自不同来源的数据，我想为所有10个图画一个图例，以节省屏幕的空间。

默认情况下，图例在添加第二个LineSeries时出现。有什么办法可以防止它出现？

谢谢，

雪碧。

Answer 1

似乎没有一种特别干净的方法。一个简单的方法是设置Legend的宽度用零LegendStyle：

<charting:Chart> 
    <charting:Chart.LegendStyle> 
     <Style TargetType="datavis:Legend"> 
      <Setter Property="Width" Value="0" /> 
     </Style> 
    </charting:Chart.LegendStyle> 

一个更激进的办法是更换一个的ControlTemplate中不包括一个传说：

<charting:Chart> 
    <charting:Chart.Template> 
     <ControlTemplate TargetType="{x:Type charting:Chart}"> 
      <Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}"> 
       <Grid> 
        <Grid.RowDefinitions> 
         <RowDefinition Height="Auto" /> 
         <RowDefinition Height="*" /> 
        </Grid.RowDefinitions> 
        <datavis:Title Content="{TemplateBinding Title}" Style="{TemplateBinding TitleStyle}" /> 
        <chartingprimitives:EdgePanel Name="ChartArea" Style="{TemplateBinding ChartAreaStyle}" Grid.Row="1" Margin="0,15,0,15"> 
         <Grid Panel.ZIndex="-1" Style="{TemplateBinding PlotAreaStyle}" /> 
         <Border Panel.ZIndex="10" BorderBrush="#FF919191" BorderThickness="1" /> 
        </chartingprimitives:EdgePanel> 
       </Grid> 
      </Border> 
     </ControlTemplate> 
    </charting:Chart.Template> 

使用下面的命名空间：

xmlns:charting="clr-namespace:System.Windows.Controls.DataVisualization.Charting;assembly=System.Windows.Controls.DataVisualization.Toolkit" 
xmlns:datavis="clr-namespace:System.Windows.Controls.DataVisualization;assembly=System.Windows.Controls.DataVisualization.Toolkit" 
xmlns:chartingprimitives="clr-namespace:System.Windows.Controls.DataVisualization.Charting.Primitives;assembly=System.Windows.Controls.DataVisualization.Toolkit" 

Answer 2

我试图Quarermeister的做法，但他在，我没有足够的属性的TargetType为“datavis”程序集的引用。

<chartingToolkit:Chart.LegendStyle> 
    <Style TargetType="Control"> 
     <Setter Property="Width" Value="0" /> 
     <Setter Property="Height" Value="0" /> 
    </Style> 
</chartingToolkit:Chart.LegendStyle> 

我也不得不填充添加到图表的右侧，因为如果没有图例，我的x轴间隔标签被延伸的图表区域之外。

Answer 3

更明智的做法......

<charting:LineSeries.LegendItemStyle > 
    <Style TargetType="{x:Type charting:LegendItem}"> 
    <Setter Property="Visibility" Value="Collapsed"/> 
    </Style> 
</charting:LineSeries.LegendItemStyle> 

对我来说比设定值更好地工作至0 ... 干杯！

Answer 4

附加属性的干燥，容易使用：

<charting:Chart helpers:ChartHelpers.IsLegendHidden="True" ...

public static class ChartHelpers 
    { 
     static ChartHelpers() 
     { 
      HideLegendStyle = new Style(typeof(Legend)); 
      HideLegendStyle.Setters.Add(new Setter(Legend.WidthProperty, 0.0)); 
      HideLegendStyle.Setters.Add(new Setter(Legend.HeightProperty, 0.0)); 
      HideLegendStyle.Setters.Add(new Setter(Legend.VisibilityProperty, Visibility.Collapsed)); 
     } 

     /// <summary>Gets a <see cref="Style"/> to hide the legend.</summary> 
     public static readonly Style HideLegendStyle; 

     #region IsLegendHidden 

     [Category("Common")] 
     [AttachedPropertyBrowsableForType(typeof(Chart))] 
     public static bool GetIsLegendHidden(Chart chart) 
     { 
      return (bool)chart.GetValue(IsLegendHiddenProperty); 
     } 
     public static void SetIsLegendHidden(Chart chart, bool value) 
     { 
      chart.SetValue(IsLegendHiddenProperty, value); 
     } 

     public static readonly DependencyProperty IsLegendHiddenProperty = 
      DependencyProperty.RegisterAttached(
       "IsLegendHidden", 
       typeof(bool), // type 
       typeof(ChartHelpers), // containing static class 
       new PropertyMetadata(default(bool), OnIsLegendHiddenChanged) 
       ); 

     private static void OnIsLegendHiddenChanged(DependencyObject d, DependencyPropertyChangedEventArgs e) 
     { 
      OnIsLegendHiddenChanged((Chart)d, (bool)e.NewValue); 
     } 
     private static void OnIsLegendHiddenChanged(Chart chart, bool isHidden) 
     { 
      if (isHidden) 
      { 
       chart.LegendStyle = HideLegendStyle; 
      } 
     } 

     #endregion IsLegendHidden 
    }