livecharts拖动警报线
时间: 2023-07-30 14:10:49 浏览: 118
LiveCharts库可以使用DraggableLine插件来实现拖动警报线的功能。您可以按照以下步骤来实现:
1. 导入DraggableLine插件:
```csharp
using LiveCharts;
using LiveCharts.Defaults;
using LiveCharts.Wpf;
using LiveCharts.Geared;
using LiveCharts.Configurations;
using LiveCharts.DraggableShapes;
```
2. 创建一个包含数据的ChartValues对象,并将其添加到Series集合中:
```csharp
var values = new ChartValues<ObservableValue>
{
new ObservableValue(3),
new ObservableValue(4),
new ObservableValue(6),
new ObservableValue(8),
new ObservableValue(2),
new ObservableValue(7),
new ObservableValue(5)
};
var lineSeries = new LineSeries
{
Title = "Series 1",
PointGeometry = null,
Values = values
};
var seriesCollection = new SeriesCollection
{
lineSeries
};
myChart.Series = seriesCollection;
```
3. 创建一个DraggableLine对象并将其添加到ChartPlottingCanvas.Children集合中:
```csharp
var draggable = new DraggableLine
{
Header = "Alert",
Fill = Brushes.Red,
Stroke = Brushes.Red,
StrokeThickness = 2,
Y = 5
};
ChartPlottingCanvas.Children.Add(draggable);
```
4. 将DraggableLine对象的Y属性绑定到Series集合中的数据项中:
```csharp
Binding yBinding = new Binding("Value");
yBinding.Source = values[3];
BindingOperations.SetBinding(draggable, DraggableLine.YProperty, yBinding);
```
5. 现在,您可以在图表上拖动警报线,并根据需要触发警报。
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