Date Time Scale
This sample uses C# 13 preview features such as partial properties, it also uses features from the CommunityToolkit.Mvvm package, you can learn more about it here.
This web site wraps every sample using a UserControl instance, but LiveCharts controls can be used inside any container.
View model
using System;
using LiveChartsCore.Defaults;
namespace ViewModelsSamples.Axes.DateTimeScaled;
public class ViewModel
{
public DateTimePoint[] Values { get; set; } = [
new() { DateTime = new(2021, 1, 1), Value = 3 },
new() { DateTime = new(2021, 1, 2), Value = 6 },
new() { DateTime = new(2021, 1, 3), Value = 5 },
new() { DateTime = new(2021, 1, 4), Value = 3 },
new() { DateTime = new(2021, 1, 5), Value = 5 },
new() { DateTime = new(2021, 1, 6), Value = 8 },
new() { DateTime = new(2021, 1, 7), Value = 6 }
];
public Func<DateTime, string> Formatter { get; set; } =
date => date.ToString("MMMM dd");
}
XAML
<UserControl x:Class="WPFSample.Axes.DateTimeScaled.View"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:lvc="clr-namespace:LiveChartsCore.SkiaSharpView.WPF;assembly=LiveChartsCore.SkiaSharpView.WPF"
xmlns:vms="clr-namespace:ViewModelsSamples.Axes.DateTimeScaled;assembly=ViewModelsSamples">
<UserControl.DataContext>
<vms:ViewModel/>
</UserControl.DataContext>
<lvc:CartesianChart>
<lvc:CartesianChart.Series>
<lvc:SeriesCollection>
<lvc:XamlColumnSeries Values="{Binding Values}"/>
</lvc:SeriesCollection>
</lvc:CartesianChart.Series>
<!--
The Interval property is used to set the interval between each label,
in this case, the interval is set to 1 day.
In the DateFormatter property, we define the format of the labels.
-->
<lvc:CartesianChart.XAxes>
<lvc:AxesCollection>
<lvc:XamlDateTimeAxis
Interval="1.00:00:00"
DateFormatter="{Binding Formatter}"/>
</lvc:AxesCollection>
</lvc:CartesianChart.XAxes>
</lvc:CartesianChart>
</UserControl>
