我使用LiveChart Library,但无法显示图表。确实,在我的窗口中,我想要许多具有多种类型的图表,因此我使用了DataTemplateSelector,它链接到每种图表类型的类。但是,当图表出现时,上面没有数据。我试图在我的“柱形图”的声明中添加DataContext="{Binding}"
,但是没有成功。
这是我的代码的一部分:
ResultView.xaml
<ScrollViewer VerticalScrollBarVisibility="Auto" HorizontalScrollBarVisibility="Auto">
<FrameworkElement.Resources>
<DataTemplate x:Key="graphEmptyTemlpate">
<StackPanel Width="Auto" Height="60" Orientation="Horizontal" MaxWidth="700">
<TextBlock Text="{Binding name}" VerticalAlignment="Center" TextAlignment="Center" FontSize="20" Margin="0,0,0,0" Foreground="#FF006B93"/>
</StackPanel>
</DataTemplate>
<DataTemplate x:Key="columnTemplate">
<StackPanel Background="#FFBFBFBF">
<TextBlock Text="{Binding title}"/>
<TextBlock Text="{Binding subTitle}"/>
<lvc:CartesianChart Width="400" Height="400" Series="{Binding listSeries}">
</lvc:CartesianChart>
</StackPanel>
</DataTemplate>
<local:GraphTemplateSelector
ColumnTemplate="{StaticResource columnTemplate}"
GraphEmptyTemplate="{StaticResource graphEmptyTemlpate}"
x:Key="graphTemplateSelector" />
</FrameworkElement.Resources>
<StackPanel Orientation="Horizontal" >
<ItemsControl ItemsSource="{Binding Results}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<Expander Header="{Binding Title}"
IsExpanded="True"
Margin="10 10 10 10"
FontSize="20"
Foreground="White">
<ItemsControl ItemsSource="{Binding Items}"
ItemTemplateSelector="{DynamicResource graphTemplateSelector}">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate>
<WrapPanel Margin="10 10 10 10" Orientation="Vertical"/>
</ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
</ItemsControl>
</Expander>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</StackPanel>
</ScrollViewer>
我的ViewModel类的构造函数在ResultViewModel.cs中
在xaml中,结果对应于C#中的结果,项目对应于C#中的RpAgitation.Items
public ResultsViewModel()
{
instance = this;
this.Results = new ObservableCollection<ResultParts>();
this.RpAgitation = new ResultParts("Results of the Agitation part");
ColumnGraph gr = new ColumnGraph();
RpAgitation.Items.Add(gr);
this.Results.Add(_rpAgitation);
}
最后找到ColumnGraph.cs
public class ColumnGraph : IGraph
{
public SeriesCollection listSeries { get; set; }
public ColumnGraph()
{
listSeries = new SeriesCollection
{
new LineSeries
{
Title = "Series 1",
Values = new ChartValues<double> { 4,7,8,9,5,4,2}
}
};
}
}
谢谢你的帮助,
最佳答案
目前,SeriesCollection类不是WPF UiFramework元素,我确实不想这么做,但是我想我们不必这样做,以避免出现此问题。
我不确定这是WPF的错误,还是我们做错了。
无论如何,我将进一步研究,目前,替代方法是尝试使用以下语法:
DataSource = new List<ChartValues<double>>
{
new ChartValues<double> {r.Next(0, 10), r.Next(0, 10), r.Next(0, 10)},
new ChartValues<double> {r.Next(0, 10), r.Next(0, 10), r.Next(0, 10)},
new ChartValues<double> {r.Next(0, 10), r.Next(0, 10), r.Next(0, 10)}
};
DataContext = this;
和XAML
<ItemsControl ItemsSource="{Binding DataSource}">
<ItemsControl.ItemTemplate>
<DataTemplate>
<lvc:CartesianChart Height="400">
<lvc:CartesianChart.Series>
<lvc:LineSeries Values="{Binding}"></lvc:LineSeries>
</lvc:CartesianChart.Series>
</lvc:CartesianChart>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
关于c# - CartesianChart(实时图表)不适用于DataTemplate,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/38334001/