我正在使用WPF Toolkit绘制折线图(我们的应用程序中的一个功能)。给定一个Collection,我能够绘制图形,但是,当用户双击图形上的DataPoint时,我发现很难获得X和Y数据值(而不是线图中的Co-Ordinate值) )。
我可以使用DataPointStyle设置属性,但无法向其添加事件。
如果我在LineSeries节点上使用MouseDoubleClick="lineChart_ShowResults_DoubleClick"
属性,那么当用户点击任何一点时它会触发一个事件。但是,如果用户点击DataPoint,我需要触发仅事件。以下是我尝试实现的XAML。请帮忙。
<Window x:Class="TeamXXX.YYYUI.GraphicalDisplay"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="GraphicalDisplay" Height="400" Width="600" xmlns:chartingToolkit="clr-namespace:System.Windows.Controls.DataVisualization.Charting;assembly=System.Windows.Controls.DataVisualization.Toolkit" mc:Ignorable="d" xmlns:d="http://schemas.microsoft.com/expression/blend/2008" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" d:DesignHeight="439" d:DesignWidth="654" SizeToContent="WidthAndHeight">
<ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Auto">
<Grid MinHeight="360" MinWidth="575" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<chartingToolkit:Chart Name="lineChart" HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
<chartingToolkit:Chart.LegendStyle>
<Style TargetType="Control">
<Setter Property="Height" Value="0" />
<Setter Property="Width" Value="0" />
</Style>
</chartingToolkit:Chart.LegendStyle>
<chartingToolkit:LineSeries DependentValuePath="Value" Name="lineSeries" IndependentValuePath="Key" ItemsSource="{Binding}" IsSelectionEnabled="True" MouseDoubleClick="lineChart_ShowResults_DoubleClick">
<!--<chartingToolkit:LineSeries.DataPointStyle>
<Style x:Uid="CommonLineSeriesDataPoint" TargetType="chartingToolkit:LineDataPoint">
<Setter Property="" Property="lineChart_ShowResults_DoubleClick"/>
</Style>
</chartingToolkit:LineSeries.DataPointStyle>-->
<chartingToolkit:LineSeries.DependentRangeAxis>
<chartingToolkit:LinearAxis Orientation="Y" Title="Cost in minutes" FontSize="16" />
</chartingToolkit:LineSeries.DependentRangeAxis>
<chartingToolkit:LineSeries.IndependentAxis>
<chartingToolkit:LinearAxis Orientation="X" Title="Fold" FontSize="16" />
</chartingToolkit:LineSeries.IndependentAxis>
</chartingToolkit:LineSeries>
</chartingToolkit:Chart>
</Grid>
</ScrollViewer>
</Window>
答案 0 :(得分:3)
正如您所说,事件会在点击任何点时触发,因为事件已分配给LineSeries。在这一行(来自你的帖子)
<chartingToolkit:LineSeries DependentValuePath="Value" Name="lineSeries" IndependentValuePath="Key" ItemsSource="{Binding}" IsSelectionEnabled="True" MouseDoubleClick="lineChart_ShowResults_DoubleClick">
通过进入LineSeries.DataPointStyle你是在正确的道路,但我相信你应该定义一个事件setter而不是setter。 像这样:
<chartingToolkit:LineSeries.DataPointStyle>
<Style>
<EventSetter>
<EventSetter Event="Control.MouseDoubleClick" Handler="lineChart_ShowResults_DoubleClick"/>
</EventSetter>
</Style> </chartingToolkit:LineSeries.DataPointStyle>
</chartingToolkit:LineSeries.DataPointStyle>
显然,删除了LineSeries上的事件处理。
我没试过,让我知道它是否有效