WPF图表交替出现在不同位置的标签

Question

我对WPF图表库有一个奇怪的问题，即

System.Windows.Controls.DataVisualization.Charting

对于某些数据，该图表似乎正确显示，但对于总和数据，x轴行交替出现在上下位置。下面是X轴样式。和制图区域样式。下面是图表代码以及x轴的标签。

但是有时正确。当呈现不同的数据时。 我没有对XAML进行任何更改。

<charting:Chart x:Name="mcChart" Width="660" HorizontalAlignment="Stretch" Padding="0"
                    Background="White" FontFamily="Lato" BorderBrush="White" BorderThickness="0">
                    <charting:Chart.LegendStyle>
                        <Style TargetType="{x:Type datavis:Legend}">
                            <Setter Property="Width" Value="0" />
                        </Style>
                    </charting:Chart.LegendStyle>
                    <charting:Chart.PlotAreaStyle>
                            <Style TargetType="Grid">
                                <Setter Property="Background" Value="White" />                                
                            </Style>
                    </charting:Chart.PlotAreaStyle>
                    <charting:Chart.Style>
                        <Style TargetType="charting:Chart">
                            <Setter Property="Template">
                                <Setter.Value>
                                    <ControlTemplate TargetType="charting:Chart">
                                        <Border Background="{TemplateBinding Background}" BorderBrush="White" BorderThickness="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}">
                                            <Grid>
                                                <Grid.RowDefinitions>
                                                    <RowDefinition Height="Auto" />
                                                    <RowDefinition Height="*" />
                                                </Grid.RowDefinitions>
                                                <!--<datavis:Title Content="{TemplateBinding Title}" Style="{TemplateBinding TitleStyle}" />-->

                                                <!-- Use a nested Grid to avoid possible clipping behavior resulting from ColumnSpan+Width=Auto -->
                                                <Grid Grid.Row="1" Margin="0,15,0,15">
                                                    <Grid.ColumnDefinitions>
                                                        <ColumnDefinition Width="*" />
                                                        <ColumnDefinition Width="Auto" />
                                                    </Grid.ColumnDefinitions>

                                                    <datavis:Legend x:Name="Legend"  Style="{TemplateBinding LegendStyle}" Grid.Column="1" />
                                                    <chartingprimitives:EdgePanel x:Name="ChartArea" Style="{TemplateBinding ChartAreaStyle}">
                                                        <Grid Canvas.ZIndex="-1" Style="{TemplateBinding PlotAreaStyle}" />
                                                        <Border Canvas.ZIndex="10" BorderBrush="White" BorderThickness="0" />
                                                    </chartingprimitives:EdgePanel>
                                                </Grid>
                                            </Grid>
                                        </Border>
                                    </ControlTemplate>
                                </Setter.Value>
                            </Setter>
                        </Style>
                    </charting:Chart.Style>
                    <charting:LineSeries Title="" IsSelectionEnabled="True"                                         
                        IndependentValueBinding="{Binding Key}" 
                        DependentValueBinding="{Binding Value}" Background="White"
                        PolylineStyle="{StaticResource GooglePolylineStyle}"                                          
                        DataPointStyle="{StaticResource GoogleLineDataPointStyle}" Margin="0,0,0,10">
                        <charting:LineSeries.DependentRangeAxis>
                            <charting:LinearAxis
                             x:Name="systolic_chart_yaxis"
                             Orientation="Y" MajorTickMarkStyle="{StaticResource ChartMajorTickMarkStyle}"                       
                             ShowGridLines="True"/>
                        </charting:LineSeries.DependentRangeAxis>
                        <!--<charting:LineSeries.IndependentAxis>
                            <charting:DateTimeAxis                               
                              Orientation="X" MajorTickMarkStyle="{StaticResource ChartMajorTickMarkStyle}"
                              Name="mainchart_timeaxis"
                              ShowGridLines="False"                                 
                               >
                            </charting:DateTimeAxis>
                        </charting:LineSeries.IndependentAxis>-->
                        <!-- Shared horizontal axis -->
                    </charting:LineSeries>
                    <charting:Chart.Axes>
                    <charting:DateTimeAxis Orientation="X" Location="Bottom" Margin="0 10 0 0"
                                           ShowGridLines="False"   
                                           MajorTickMarkStyle="{StaticResource ChartMajorTickMarkStyle}"
                                           AxisLabelStyle="{StaticResource DateTimeAxisLabelStyle1}"/>
                    </charting:Chart.Axes>
</charting:Chart>

<style x:Key="DateTimeAxisLabelStyle1" TargetType="charting:DateTimeAxisLabel">
                        <Setter Property="YearsIntervalStringFormat" 
                        Value="{}{0:MM/yy}"/>
                        <Setter Property="MonthsIntervalStringFormat" 
                        Value="{}{0:MM/yy}"/>
                        <Setter Property="DaysIntervalStringFormat" 
                        Value="{}{0:MM/dd}"/>
                        <Setter Property="HoursIntervalStringFormat" 
                        Value="{}{0:hh:mm}"/>
                        <Setter Property="RenderTransform">
                            <Setter.Value>
                                <RotateTransform Angle="270"></RotateTransform>
                            </Setter.Value>
                        </Setter>
                        <Setter Property="RenderTransformOrigin" Value="0.5,0.5"></Setter>
                        <Setter Property="Width" Value="40"/>                    
</Style>