如何删除WPF Toolkit图表区域和绘图区域之间的空间？

Question

我正在使用chartingToolKit：图表控件。我想删除图表和绘图区域之间出现的空白区域。附上WPF样本和要删除的区域图像。

<Window x:Class="WpfApplication2.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525" xmlns:chartingToolkit="clr-namespace:System.Windows.Controls.DataVisualization.Charting;assembly=System.Windows.Controls.DataVisualization.Toolkit">


<Grid>
    <chartingToolkit:Chart x:Name="chart" Width="500" Height="300" Margin="0, 0, 0, 0"   LegendStyle="{StaticResource LegendStyle}"   >


        <chartingToolkit:AreaSeries ItemsSource="{Binding}"  

                                   DependentValuePath="Value"

                                   IndependentValuePath="Key"

                                   Background="Red"

                                    >


        </chartingToolkit:AreaSeries>

        <chartingToolkit:Chart.Axes>
            <chartingToolkit:LinearAxis Orientation="X" ShowGridLines="False" Visibility="Hidden">

            </chartingToolkit:LinearAxis>
            <chartingToolkit:LinearAxis Orientation="Y" ShowGridLines="False" Visibility="Hidden"/>
        </chartingToolkit:Chart.Axes>

    </chartingToolkit:Chart>
</Grid>

必须删除标有红色箭头的区域

Answer 1

为了实现这一目标，您需要重新模板化图表。标准图表模板如下：

            <ControlTemplate TargetType="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}" />

                        <!-- 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" Title="{TemplateBinding LegendTitle}" 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="#FF919191" BorderThickness="1" />
                            </chartingprimitives:EdgePanel>
                        </Grid>
                    </Grid>
                </Border>
            </ControlTemplate>

这详细说明了绘图区域，标题，图例等的位置......它还包括绘图区域周围的硬编码边距，因此您无法通过简单地设置图表样式来实现您的目标。如果您只想要图表区域而不需要其他任何内容，则可以按如下方式简化图表模板：

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

<Grid>
  <chartingToolkit:Chart x:Name="chart" Width="500" Height="300"
                         Margin="0, 0, 0, 0" Padding="0">
    <chartingToolkit:AreaSeries ItemsSource="{Binding}"  
                                  DependentValuePath="Value"
                                  IndependentValuePath="Key"
                                  Background="Red">
    </chartingToolkit:AreaSeries>
    <chartingToolkit:Chart.Axes>
      <chartingToolkit:LinearAxis Orientation="X" ShowGridLines="False" Height="0">
      </chartingToolkit:LinearAxis>
      <chartingToolkit:LinearAxis Orientation="Y" ShowGridLines="False" Width="0"/>
    </chartingToolkit:Chart.Axes>
    <chartingToolkit:Chart.Template>
      <ControlTemplate TargetType="chartingToolkit:Chart">
        <Border Background="{TemplateBinding Background}"
                BorderBrush="{TemplateBinding BorderBrush}"
                BorderThickness="{TemplateBinding BorderThickness}"
                Padding="{TemplateBinding Padding}">
          <Grid>
            <chartingprimitives:EdgePanel x:Name="ChartArea" Style="{TemplateBinding ChartAreaStyle}">
              <Grid Canvas.ZIndex="-1" Style="{TemplateBinding PlotAreaStyle}" />
              <Border Canvas.ZIndex="10" BorderBrush="#FF919191" BorderThickness="1" />
            </chartingprimitives:EdgePanel>
          </Grid>
        </Border>
      </ControlTemplate>
    </chartingToolkit:Chart.Template>
  </chartingToolkit:Chart>
</Grid>

这将删除您看到的填充。

Answer 2

为了给你一点空间而不重新模板化控件，设置边距（如你所做）和将图表控件的填充设置为零。

Margin="0" Padding="0"