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列表框内的WPF图表问题

charts wpf c#

abhishek · 技术社区 · 14 年前

我一直在使用DataVisualization.Charting.Chart生成一些图表。一切都很好,直到我把它放在列表框的数据模板中。

在列表框中,图表数据正确显示,但图例未显示。

我一直在用普通的线列图。代码如下:

<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>

你看,我放了一个列表视图和一个图表。ListView正确地显示数据和图表。但传说并没有出现。

我已经试过将同一个图表放在列表框外,它正确地显示了图例,但不在数据模板内。

如果有人告诉我这件事我错在哪里,那会很有帮助的。

1 回复 | 直到 14 年前

Ray Burns 14 年前

我怀疑问题出在你的列表基本风格上。你的XAML对我很好。我刚刚将它粘贴到一个新窗口中,并在InitializeComponent()中添加了以下内容:

  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,请向我们展示您正在使用的样式,并告知您的WPFToolkit版本。