WPF如何实现在一个自定义控件里使用 LiveCharts 显示两个图表
时间: 2024-02-28 20:55:03 浏览: 143
要在WPF自定义控件中使用LiveCharts显示两个图表,可以使用以下步骤:
1. 引用LiveCharts NuGet包。
2. 在自定义控件的XAML文件中,添加LiveCharts的命名空间:xmlns:lvc="clr-namespace:LiveCharts.Wpf;assembly=LiveCharts.Wpf"
3. 在自定义控件的XAML文件中,添加两个LiveCharts的控件(比如LineSeries、ColumnSeries等),并分别设置它们的数据源和属性。
4. 在自定义控件的代码文件中,为每个LiveCharts控件创建一个依赖属性,并在属性变化时重新绘制图表。
下面是一个简单的示例代码,其中MyCustomControl是自定义控件,其中包含两个LiveCharts控件:
```csharp
public class MyCustomControl : Control
{
static MyCustomControl()
{
DefaultStyleKeyProperty.OverrideMetadata(typeof(MyCustomControl), new FrameworkPropertyMetadata(typeof(MyCustomControl)));
}
public SeriesCollection Series1
{
get { return (SeriesCollection)GetValue(Series1Property); }
set { SetValue(Series1Property, value); }
}
public static readonly DependencyProperty Series1Property =
DependencyProperty.Register("Series1", typeof(SeriesCollection), typeof(MyCustomControl), new PropertyMetadata(null, OnSeries1PropertyChanged));
private static void OnSeries1PropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var control = d as MyCustomControl;
control.DrawChart1();
}
public SeriesCollection Series2
{
get { return (SeriesCollection)GetValue(Series2Property); }
set { SetValue(Series2Property, value); }
}
public static readonly DependencyProperty Series2Property =
DependencyProperty.Register("Series2", typeof(SeriesCollection), typeof(MyCustomControl), new PropertyMetadata(null, OnSeries2PropertyChanged));
private static void OnSeries2PropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
var control = d as MyCustomControl;
control.DrawChart2();
}
private void DrawChart1()
{
//绘制第一个图表
chart1.Series = Series1;
}
private void DrawChart2()
{
//绘制第二个图表
chart2.Series = Series2;
}
private LiveCharts.Wpf.CartesianChart chart1;
private LiveCharts.Wpf.CartesianChart chart2;
public override void OnApplyTemplate()
{
base.OnApplyTemplate();
chart1 = GetTemplateChild("PART_Chart1") as LiveCharts.Wpf.CartesianChart;
chart2 = GetTemplateChild("PART_Chart2") as LiveCharts.Wpf.CartesianChart;
DrawChart1();
DrawChart2();
}
}
```
在自定义控件的XAML文件中,可以使用以下代码来定义两个LiveCharts控件:
```xml
<Style TargetType="{x:Type local:MyCustomControl}">
<Setter Property="Template">
<Setter.Value>
<ControlTemplate TargetType="{x:Type local:MyCustomControl}">
<Grid>
<lvc:CartesianChart x:Name="PART_Chart1" />
<lvc:CartesianChart x:Name="PART_Chart2" />
</Grid>
</ControlTemplate>
</Setter.Value>
</Setter>
</Style>
```
然后,在使用自定义控件的地方,可以使用以下代码来设置两个图表的数据源:
```xml
<local:MyCustomControl Series1="{Binding Data1}" Series2="{Binding Data2}" />
```
其中,Data1和Data2是两个SeriesCollection类型的数据源,可以在ViewModel中定义并绑定到视图中。
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