前言

今天大姚给大家分享一个.NET开源（MIT License）、功能强大、简单、灵活、跨平台的图表、地图和仪表库：LiveCharts2。

项目介绍

LiveCharts2是一个.NET开源、简单、灵活、交互式且功能强大的.NET图表、地图和仪表，现在几乎可以在任何地方运行如：Maui、Uno Platform、Blazor-wasm、WPF、WinForms、Xamarin、Avalonia、WinUI、UWP。

• 在线API文档：https://livecharts.dev/docs/blazor/2.0.0-rc2/gallery

项目源代码

Blazor Wasm中快速使用

创建Blazor WebAssembly项目

安装NuGet

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NuGet包管理器中搜索：LiveChartsCore.SkiaSharpView.Blazor 点击安装。

注意：该包目前仍处于预发行阶段，尚未有正式版，很多同学反馈说找不到，是因为没有勾选：包括预发行版。

Basic Bars

View Model

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using CommunityToolkit.Mvvm.ComponentModel;
using LiveChartsCore;
using LiveChartsCore.SkiaSharpView;
using LiveChartsCore.SkiaSharpView.Painting;
using SkiaSharp;
 
namespace ViewModelsSamples.Bars.Basic;
 
public partial class ViewModel : ObservableObject
{
    public ISeries[] Series { get; set; } =
    {
        new ColumnSeries<double>
        {
            Name = "Mary",
            Values = new double[] { 2, 5, 4 }
        },
        new ColumnSeries<double>
        {
            Name = "Ana",
            Values = new double[] { 3, 1, 6 }
        }
    };
 
    public Axis[] XAxes { get; set; } =
    {
        new Axis
        {
            Labels = new string[] { "Category 1", "Category 2", "Category 3" },
            LabelsRotation = 0,
            SeparatorsPaint = new SolidColorPaint(new SKColor(200, 200, 200)),
            SeparatorsAtCenter = false,
            TicksPaint = new SolidColorPaint(new SKColor(35, 35, 35)),
            TicksAtCenter = true,
            // By default the axis tries to optimize the number of 
            // labels to fit the available space, 
            // when you need to force the axis to show all the labels then you must: 
            ForceStepToMin = true, 
            MinStep = 1 
        }
    };
}

HTML

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@page "/Bars/Basic"
@using LiveChartsCore.SkiaSharpView.Blazor
@using ViewModelsSamples.Bars.Basic
 
<CartesianChart
 Series="ViewModel.Series"
 XAxes="ViewModel.XAxes"
 LegendPosition="LiveChartsCore.Measure.LegendPosition.Right">
</CartesianChart>
 
@code {
 public ViewModel ViewModel { get; set; } = new();
}

Delayed Animations

View model

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using System;
using System.Collections.Generic;
using CommunityToolkit.Mvvm.ComponentModel;
using LiveChartsCore;
using LiveChartsCore.Drawing;
using LiveChartsCore.Kernel;
using LiveChartsCore.SkiaSharpView;
using LiveChartsCore.SkiaSharpView.Drawing.Geometries;
 
namespace ViewModelsSamples.Bars.DelayedAnimation;
 
public partial class ViewModel : ObservableObject
{
    public ViewModel()
    {
        var values1 = new List<float>();
        var values2 = new List<float>();
 
        var fx = EasingFunctions.BounceInOut; // this is the function we are going to plot
        var x = 0f;
 
        while (x <= 1)
        {
            values1.Add(fx(x));
            values2.Add(fx(x - 0.15f));
            x += 0.025f;
        }
 
        var columnSeries1 = new ColumnSeries<float>
        {
            Values = values1,
            Stroke = null,
            Padding = 2
        };
 
        var columnSeries2 = new ColumnSeries<float>
        {
            Values = values2,
            Stroke = null,
            Padding = 2
        };
 
        columnSeries1.PointMeasured += OnPointMeasured;
        columnSeries2.PointMeasured += OnPointMeasured;
 
        Series = new List<ISeries> { columnSeries1, columnSeries2 };
    }
 
    private void OnPointMeasured(ChartPoint<float, RoundedRectangleGeometry, LabelGeometry> point)
    {
        var perPointDelay = 100; // milliseconds
        var delay = point.Context.Entity.MetaData!.EntityIndex * perPointDelay;
        var speed = (float)point.Context.Chart.AnimationsSpeed.TotalMilliseconds + delay;
 
        point.Visual?.SetTransition(
            new Animation(progress =>
            {
                var d = delay / speed;
 
                return progress <= d
                    ? 0
                    : EasingFunctions.BuildCustomElasticOut(1.5f, 0.60f)((progress - d) / (1 - d));
            },
            TimeSpan.FromMilliseconds(speed)));
    }
 
    public List<ISeries> Series { get; set; }
}

HTML

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@page "/Bars/DelayedAnimation"
@using LiveChartsCore.SkiaSharpView.Blazor
@using ViewModelsSamples.Bars.DelayedAnimation
 
<CartesianChart
 Series="ViewModel.Series">
</CartesianChart>
 
@code {
 public ViewModel ViewModel { get; set; } = new();
}

项目更多图表截图

项目源码地址

更多项目实用功能和特性欢迎前往项目开源地址查看👀，别忘了给项目一个Star支持💖。

• https://github.com/beto-rodriguez/LiveCharts2

优秀项目和框架精选

该项目已收录到C#/.NET/.NET Core优秀项目和框架精选中，关注优秀项目和框架精选能让你及时了解C#、.NET和.NET Core领域的最新动态和最佳实践，提高开发工作效率和质量。坑已挖，欢迎大家踊跃提交PR推荐或自荐（让优秀的项目和框架不被埋没🤞）。

• https://github.com/YSGStudyHards/DotNetGuide/blob/main/docs/DotNet/DotNetProjectPicks.md