好吧，我有下一个问题 - 在页面上我有WPF工具包图表，折线图。
var array = cssString.match(/([ a-zA-Z])*(\d*[.]?\d*)*/g);
当我转到此页面时，lineChart可以为空，即使数据绑定到图表<chartingToolkit:Chart Grid.Row="1" Grid.ColumnSpan="2" Grid.Column="0" Name="lineChart" Visibility="Hidden" VerticalAlignment="Top" Height="150" BorderThickness="3" BorderBrush="#FF423852">
<chartingToolkit:Chart.Axes>
<chartingToolkit:LinearAxis Orientation="Y" Minimum="0">
<chartingToolkit:LinearAxis.MajorTickMarkStyle>
<Style TargetType="Line">
<Setter Property="Stroke" Value="#bdb3ce" />
<Setter Property="StrokeThickness" Value="1" />
<Setter Property="Y1" Value="-4" />
<Setter Property="Y2" Value="4" />
</Style>
</chartingToolkit:LinearAxis.MajorTickMarkStyle>
</chartingToolkit:LinearAxis>
</chartingToolkit:Chart.Axes>
<chartingToolkit:Chart.Style>
<Style TargetType="Control">
<Setter Property="Foreground" Value="#bdb3ce" />
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="chartingToolkit:Chart">
<Border Background="{TemplateBinding Background}" BorderBrush="{TemplateBinding BorderBrush}" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}" Name="BorderParent">
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="Auto" />
<RowDefinition Height="*" />
</Grid.RowDefinitions>
<!-- Use a nested Grid to avoid possible clipping behavior resulting from ColumnSpan+Width=Auto -->
<Grid Grid.Row="1" Margin="5 15">
<Grid.ColumnDefinitions>
<ColumnDefinition Width="*" />
<ColumnDefinition Width="Auto" />
</Grid.ColumnDefinitions>
<primitives:EdgePanel x:Name="ChartArea" Style="{TemplateBinding ChartAreaStyle}">
<Grid x:Name="PlotArea" Canvas.ZIndex="-1" Style="{TemplateBinding PlotAreaStyle}"/>
<Border Canvas.ZIndex="10" BorderBrush="#61596f" BorderThickness="1 0 0 1" Margin="5 2"/>
<Canvas Background="Transparent" x:Name="activePointGridLines" Margin="5 0 0 0" />
</primitives:EdgePanel>
</Grid>
</Grid>
</Border>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
</chartingToolkit:Chart.Style>
<chartingToolkit:Chart.LegendStyle>
<Style TargetType="Control">
<Setter Property="Width" Value="0" />
</Style>
</chartingToolkit:Chart.LegendStyle>
<chartingToolkit:Chart.PlotAreaStyle>
<Style TargetType="Grid">
<Setter Property="Background" Value="Transparent" />
<Setter Property="SnapsToDevicePixels" Value="True" />
</Style>
</chartingToolkit:Chart.PlotAreaStyle>
<chartingToolkit:LineSeries IndependentValuePath="Key" DependentValuePath="Value" ItemsSource="{Binding}" DataContext="{Binding}" Margin="5.5,0,0,3" DataPointStyle="{StaticResource SeriesDataPointStyle}" Name="nLineSeries">
<chartingToolkit:LineSeries.IndependentAxis>
<chartingToolkit:CategoryAxis Orientation="X" MajorTickMarkStyle="{StaticResource ChartMajorTickMarkStyle}"/>
</chartingToolkit:LineSeries.IndependentAxis>
</chartingToolkit:LineSeries>
</chartingToolkit:Chart>
。我注意到，当图表为空时，它只有一个轴（Y轴）。当图表不为空时，绑定图表后有两个轴。
DataContext什么可能导致此行为以及如何解决？
答案 0 :(得分：0)
问题已解决。
我已删除<chartingToolkit:LineSeries IndependentValuePath="Key" DependentValuePath="Value" ItemsSource="{Binding}" DataContext="{Binding}" Margin="5.5,0,0,3" DataPointStyle="{StaticResource SeriesDataPointStyle}" Name="nLineSeries">
<chartingToolkit:LineSeries.IndependentAxis>
<chartingToolkit:CategoryAxis Orientation="X" MajorTickMarkStyle="{StaticResource ChartMajorTickMarkStyle}"/>
</chartingToolkit:LineSeries.IndependentAxis>
</chartingToolkit:LineSeries>
来自：
<chartingToolkit:LineSeries IndependentValueBinding="{Binding Path=Key}" DependentValueBinding="{Binding Path=Value}" Margin="5.5,0,0,3" DataPointStyle="{StaticResource SeriesDataPointStyle}" />
致：
DataContext现在将数据绑定到图表的ItemsSource，但绑定到存在的LineSeries _lineChart.DataContext = valueList;
。
来自：
var lineChartSerie = (LineSeries)_lineChart.Series.FirstOrDefault();
if (lineChartSerie != null) lineChartSerie.ItemsSource = valueList;
致：
{{1}}