我為 livechart 創(chuàng)建了一個(gè)用戶控件，并嘗試圍繞它創(chuàng)建依賴屬性。但是依賴屬性沒有得到更新。我用谷歌搜索并在 StackOverflow 中找到了答案。所以我一直在四處尋找。我按照答案中提到的步驟操作，但仍然無法更新圖表。代碼：-<LiveChart:CartesianChart Grid.Row="1" Background="White"> <LiveChart:CartesianChart.AxisX> <LiveChart:Axis Title="{Binding Path=XAxisTitle, ElementName=chartControl, UpdateSourceTrigger=PropertyChanged}" Labels="{Binding Path=XAxisValues, ElementName=chartControl, UpdateSourceTrigger=PropertyChanged}"/> </LiveChart:CartesianChart.AxisX> <LiveChart:CartesianChart.AxisY> <LiveChart:Axis Title="{Binding Path=YAxisTitle, ElementName=chartControl, UpdateSourceTrigger=PropertyChanged}" LabelFormatter="{Binding Path=Formatter, ElementName=chartControl, UpdateSourceTrigger=PropertyChanged}" MinValue="0"></LiveChart:Axis> </LiveChart:CartesianChart.AxisY> <LiveChart:CartesianChart.Series> <LiveChart:LineSeries Values="{Binding Path=SpectrumChartSeries, ElementName=chartControl, UpdateSourceTrigger=PropertyChanged, Mode=TwoWay}"></LiveChart:LineSeries> </LiveChart:CartesianChart.Series> </LiveChart:CartesianChart>我將用戶控件命名為 chartControl 并使用了 ElementName。我的后端：-public List<Point> ChartPoints { get { return (List<Point>)GetValue(ChartPointsProperty); } set { SetValue(ChartPointsProperty, value); } } public static readonly DependencyProperty ChartPointsProperty = DependencyProperty.Register("ChartPoints", typeof(List<Point>), typeof(chartcontrol), new FrameworkPropertyMetadata(new List<Point>(), onChartrPointChange)); private static void onChartrPointChange(DependencyObject d, DependencyPropertyChangedEventArgs e) { var control = d as chartcontrol; var points = e.NewValue as List<Point>; control.UpdateChart(points); }更改的事件被命中并且值被更新。但仍然沒有反映在圖表中。所以有點(diǎn)困惑。問題是當(dāng)我嘗試使用WPF 工具 Snoop并單擊線系列時(shí)，我可以看到圖表立即更新，點(diǎn)擊前：-點(diǎn)擊后：-
1 回答
慕的地10843
TA貢獻(xiàn)1785條經(jīng)驗(yàn) 獲得超8個(gè)贊
發(fā)布答案，以便它可以幫助像我這樣的人。我能夠找到這個(gè)博客幫助我的答案。正如他們所提到的，我需要在 Xaml 中添加數(shù)據(jù)上下文。
LiveChart:CartesianChart Grid.Row="1" Background="White" DataContext="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=local:LiveChartControl}}">
<LiveChart:CartesianChart.AxisX>
<LiveChart:Axis Title="{Binding Path=XAxisTitle, Mode=TwoWay}" Labels="{Binding Path=XAxisValues, Mode=TwoWay}" MinValue="0"/>
</LiveChart:CartesianChart.AxisX>
<LiveChart:CartesianChart.AxisY>
<LiveChart:Axis Title="{Binding Path=YAxisTitle, Mode=TwoWay}" LabelFormatter="{Binding Path=Formatter, Mode=TwoWay}" MinValue="0"></LiveChart:Axis>
</LiveChart:CartesianChart.AxisY>
<LiveChart:CartesianChart.Series>
<LiveChart:LineSeries Values="{Binding Path=ChartPointsInChartValues, Mode=TwoWay}"/>
<LiveChart:VerticalLineSeries Values="{Binding Path=EnergyLineChartValues , Mode=TwoWay}"/>
</LiveChart:CartesianChart.Series>
</LiveChart:CartesianChart>
這現(xiàn)在開始起作用了。
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