Question

我一直在使用DataVisualization.Charting.Chart生成一些图表。一切都很好，直到我把它放在ListBox的DataTemplate中。

在ListBox中，图表数据正确显示，但图例未显示。

我一直在使用Normal LineSeries图表。这是代码：

<ListBox Style="{DynamicResource listBasic}"
                         FontSize="12"
                         FontWeight="Normal"
                         ItemsSource="{Binding PsychrometricLogs}">
                    <ListBox.GroupStyle>
                        <GroupStyle>
                            <GroupStyle.ContainerStyle>
                                <Style TargetType="{x:Type GroupItem}">
                                    <Setter Property="Template">
                                        <Setter.Value>
                                            <ControlTemplate>
                                                <Expander Header="{Binding Name}"
                                                          FontFamily="Calibri"
                                                          FontSize="18"
                                                          Foreground="{DynamicResource defForegroundBrush}"
                                                          IsExpanded="True">
                                                    <ItemsPresenter />
                                                </Expander>
                                            </ControlTemplate>
                                        </Setter.Value>
                                    </Setter>
                                </Style>
                            </GroupStyle.ContainerStyle>
                        </GroupStyle>
                    </ListBox.GroupStyle>
                    <ListBox.ItemTemplate>
                        <DataTemplate>

                                <Grid>
                                    <Border CornerRadius="5"
                                            Margin="2,5,2,5"
                                            Opacity=".3"
                                            Background="#000000" />
                                    <DockPanel>
                                    <chart:Chart Title="{Binding DisplayName}"
                                                 FontSize="14"
                                                 DockPanel.Dock="Top"
                                                 LegendTitle="Legends"
                                                 Margin="20,15,20,5"
                                                 Foreground="#000000"
                                                 DataContext="{Binding Logs}">
                                        <chart:LineSeries Title="Temperature"
                                                          AnimationSequence="FirstToLast"
                                                          IndependentValueBinding="{Binding TimeStamp}"
                                                          DependentValueBinding="{Binding Temparature}"
                                                          ItemsSource="{Binding}" />
                                        <chart:LineSeries Title="Relative Humidity"
                                                          AnimationSequence="FirstToLast"
                                                          IndependentValueBinding="{Binding TimeStamp}"
                                                          DependentValueBinding="{Binding RelativeHumidity}"
                                                          ItemsSource="{Binding}" />
                                        <chart:LineSeries Title="Grains Per Pound"
                                                          AnimationSequence="FirstToLast"
                                                          IndependentValueBinding="{Binding TimeStamp}"
                                                          DependentValueBinding="{Binding GrainsPerPound}"
                                                          ItemsSource="{Binding}" />
                                        <chart:LineSeries Title="Grains Depression"
                                                          AnimationSequence="FirstToLast"
                                                          IndependentValueBinding="{Binding TimeStamp}"
                                                          DependentValueBinding="{Binding GrainsDepression}"
                                                          ItemsSource="{Binding}" />
                                    </chart:Chart>
                                    <ListView ItemsSource="{Binding Logs}"
                                              DockPanel.Dock="Top"
                                              Margin="5,0,5,5"
                                              Padding="0">
                                        <ListView.View>
                                            <GridView AllowsColumnReorder="True">
                                                <GridViewColumn Header="Time Stamp"
                                                                DisplayMemberBinding="{Binding TimeStamp}" />
                                                <GridViewColumn Header="Temperature"
                                                                DisplayMemberBinding="{Binding Temparature}" />
                                                <GridViewColumn Header="RH"
                                                                DisplayMemberBinding="{Binding RelativeHumidity}" />
                                                <GridViewColumn Header="GPP"
                                                                DisplayMemberBinding="{Binding GrainsPerPound}" />
                                                <GridViewColumn Header="GD"
                                                                DisplayMemberBinding="{Binding GrainsDepression}" />
                                            </GridView>
                                        </ListView.View>
                                    </ListView>
                                    </DockPanel>    
                                </Grid>

                        </DataTemplate>
                    </ListBox.ItemTemplate>
                </ListBox>

你可以看到，我已经放置了一个ListView和一个图表。 ListView正确显示数据以及图表。但是传说没有出现。

我已经尝试将相同的图表放在ListBox之外，它正确地显示了Legends但不在DataTemplate中。

如果有人告诉我这里错了，那会很有帮助。

Answer 1

我怀疑问题出在你的listBasic风格中。您的XAML非常适合我。我只是将其粘贴到一个新窗口并在InitializeComponent（）中添加以下内容：

  var rand = new Random();
  DataContext = new { PsychrometricLogs =
    from i in Enumerable.Range(0, 5)
    select new
    {
      Logs =
        from j in Enumerable.Range(0, 10)
        select new
        {
          TimeStamp = rand.Next(10),
          Temparature = (decimal)rand.Next(100),
          RelativeHumidity = (decimal)rand.Next(100),
          GrainsPerPound = (decimal)rand.Next(10),
          GrainsDepression = (decimal)rand.Next(10),
        }
    }};

如需其他帮助，请向我们展示您使用的样式，并告诉我们您的WPFToolkit版本。

顺便说一句，你错误拼写了“温度”。

ListBox中的WPF图表问题

1 个答案: