愿你出走半生,归来仍是少年！ 

环境：.NET 7、MAUI 

        话接上回（9.单柱状图（SingleBarChart）），从单柱拓展到多柱状图。

1.数据设置

 private void InitValue(List<BasicSerieDto> dtos)
 {

     Series = new ISeries[dtos.Count];

     for (int i = 0; i < dtos.Count; i++)
     {

         Series[i] = dtos[i].ToMuliBar();

     }

     chart.SetBinding(CartesianChart.SeriesProperty, new Binding("Series"));
 }

2.使用

public partial class MuliBarChartDemo : ContentPage
{
    private class Fruit
    {
        public string name { get; set; }

        public string WeekDay { get; set; }

        public double Money { get; set; }
    }

    public MuliBarChartDemo()
    {
        InitializeComponent();

        #region 原始数据

        List<Fruit> apples = new List<Fruit>();

        for (int i = 0; i < 7; i++)
        {
            apples.Add(new Fruit()
            {
                WeekDay = "周" + i,
                Money = (new Random()).NextDouble() * 10000,
                name = "苹果"
            });

        }

        List<Fruit> pears = new List<Fruit>();

        for (int i = 0; i < 7; i++)
        {
            pears.Add(new Fruit()
            {
                WeekDay = "周" + i,
                Money = (new Random()).NextDouble() * 10000,
                name = "梨子"
            });

        }

        List<Fruit> bananas = new List<Fruit>();

        for (int i = 0; i < 7; i++)
        {
            bananas.Add(new Fruit()
            {
                WeekDay = "周" + i,
                Money = (new Random()).NextDouble() * 10000,
                name = "香蕉"
            });

        }


        #endregion

        var appleDto = new BasicSerieDto(apples[0].name, apples.Select(p => p.Money).ToList(), apples.Select(p => p.WeekDay + "\n" + Math.Round(p.Money, 2)).ToList());


        var pearDto = new BasicSerieDto(pears[0].name, pears.Select(p => p.Money).ToList(), pears.Select(p => p.WeekDay + "\n" + Math.Round(p.Money, 2)).ToList());

        var bananaDto = new BasicSerieDto(bananas[0].name, bananas.Select(p => p.Money).ToList(), bananas.Select(p => p.WeekDay + "\n" + Math.Round(p.Money, 2)).ToList());


        chart.BindData("一周营业额", apples.Select(p => p.WeekDay).ToList(), new List<BasicSerieDto>()
                {
                    appleDto,pearDto,bananaDto
                }
            );


    }
}

3.效果