图表 wpf 工具包处理程序绘图标签

Question

我的英语写得不好。

我正在使用具有线性系列趋势的 wpf 工具包。

我每天通过 linq 分钟从数据库中提取1001200...1300

年

并将它们显示在 x 轴的图形上

我想将此值转换为小时小时：分钟 = 1200 * 60 + "：" 1200% 60

向他们展示 X 轴

有大量

数据时的问题和图表很难看到，所以我应该使用

xAxis.Interval = sliderIntervalloX.Value;

它适用于LineSeries(但对于DateTimeSerie来说太慢了(

然后我会截取 x 上的写法并写下标签的值

用我上面写的公式

<charting:Chart Name="GraficoTemperatura"
        HorizontalAlignment="Left" Title="Grafico temperatura"
        VerticalAlignment="Top" Background="#FF4CAE78" Height="231.25" Width="576.25">
<chartingToolkit:Chart.Axes>

<chartingToolkit:LinearAxis 
                    x:Name="xAxis"
                    Orientation="X" 
                    ShowGridLines="True"  
                    Location="Bottom" 
                    Title="Minuto della lettura"
                    >
</chartingToolkit:LinearAxis>  
 <charting:LineSeries                
DependentValuePath="Value" 
IndependentValuePath="Key"
ItemsSource="{Binding}" Title="Temperatura (°C)" AnimationSequence="FirstToLast" >
  <!-- style della linea -->
  <chartingToolkit:LineSeries.DataPointStyle>
      <Style TargetType="{x:Type chartingToolkit:LineDataPoint}">
          <Setter Property="Background" Value="Red"/>
          <Setter Property="Visibility" Value="Collapsed"/>
          <Setter Property="Template" Value="{x:Null}"/>
      </Style>
  </chartingToolkit:LineSeries.DataPointStyle>
</charting:LineSeries>

</charting:Chart>

Answer 1

解决方案

XAML 资源

<local:RatingToStringConverter x:Key="RatingToStringConverter"/>
<Style x:Key="XAxisLabelStyle" TargetType="chartingToolkit:AxisLabel">
    <Setter Property="IsTabStop" Value="False"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="chartingToolkit:AxisLabel">
                <!-- <TextBlock Text="{Binding Label, Converter=}"/> -->
                <TextBlock Text="{Binding Converter={StaticResource RatingToStringConverter}}"/>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

XAML 图表

            <chartingToolkit:LinearAxis  
                                        x:Name="xAxis"
                                        Orientation="X" 
                                        ShowGridLines="True"  
                                        Location="Bottom" 
                                        Title="Orario della lettura"  
                                        AxisLabelStyle="{StaticResource XAxisLabelStyle}"
                                        >

在 CS 上

public class RatingToStringConverter : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            // Validate parameters
            /*if (!(value is double))
            {
                throw new NotSupportedException("Unsupported value type in RatingToStringConverter.");
            }
            */
            // Convert number to string
            //int  idoubleValue = Math.Ceiling ((double)value);
            int  doubleValue = System.Convert.ToInt32(value);
            //int  doubleValue = (int)value;
            string a = (doubleValue / 60).ToString();
            string b = (doubleValue % 60).ToString();
            return a + ":" + b;
        }
        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }
    }