8.多折线图（MuliLineChart）

愿你出走半生,归来仍是少年！ 

环境：.NET 7、MAUI 

        话接上回（7.单折线图（SingleLineChart）），多个类型的折线图。

1.数据设置

        通过BasicSerieDto的ToSingleLine方法直接获取LineSeries<double>，然后获取集合给它塞进去，其他的和单线的一样。

  private void InitValue(List<BasicSerieDto> dtos)
  {
      Series = new ISeries[dtos.Count];
 
      for (int i = 0; i < dtos.Count; i++)
      {
          var dto = dtos[i];
           
          Series[i] = dto.ToMuliLine();
      }
       
 
      chart.SetBinding(CartesianChart.SeriesProperty, new Binding("Series"));
  }

2.使用

public partial class MuliLineChartDemo : ContentPage
{
 
    private class Fruit
    {
        public string name { get; set; }
 
        public string WeekDay { get; set; }
 
        public double Money { get; set; }
    }
 
    public MuliLineChartDemo()
    {
        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