ComponentOne Xamarin.iOS Documentation
Controls / FlexChart / Features / Mixed Charts
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    Mixed Charts
    In This Topic

    You can add multiple series to your charts and set a different ChartType for each series. Such charts are helpful in analyzing complex chart data on a single canvas. The same data can be used with different visualizations or related data can be displayed together to convey trends.

    The following image shows a FlexChart with multiple series.

    The following code example demonstrates how to create multiple instances of type ChartSeries with different ChartTypes and add them to the FlexChart.

    1. Add a new class, SalesData, to the application serve as the data source for the FlexChart control.
      CS
      Copy Code
      class SalesData
      {
          #region ** fields
      
          static Random _rnd = new Random();
          static string[] _countries = new string[] { "US", "Germany", "UK", "Japan", "Italy", "Greece" };
      
          #endregion
      
          #region ** initialization
      
          public SalesData()
          {
              this.Name = string.Empty;
              this.Sales = 0;
              this.Expenses = 0;
              this.Downloads = 0;
              this.Date = DateTime.Now;
          }
      
          public SalesData(string name, double sales, double expenses, double downloads, DateTime date)
          {
              this.Name = name;
              this.Sales = sales;
              this.Expenses = expenses;
              this.Downloads = downloads;
              this.Date = date;
          }
      
          #endregion
      
          #region ** object model
      
          [Export("Name")]
          public string Name { get; set; }
          [Export("Sales")]
          public double Sales { get; set; }
          [Export("Expenses")]
          public double Expenses { get; set; }
          [Export("Downloads")]
          public double Downloads { get; set; }
      
          public DateTime Date { get; set; }
          [Export("Date")]
          public NSDate iOSDate
          {
              get
              {
                  return DateTimeToNSDate(Date);
              }
              set
              {
                  Date = NSDateToDateTime(value);
              }
          }
          #endregion
      
          #region ** implementation
      
          // ** static list provider
          public static List<SalesData> GetSalesDataList()
          {
              List<SalesData>  array = new List<SalesData> ();
              for (int i = 0; i < GetCountries().Length; i++)
              {
                  array.Add(new SalesData
                  {
                      Sales = _rnd.NextDouble() * 10000,
                      Expenses = _rnd.NextDouble() * 5000,
                      Downloads = _rnd.Next(20000),
                      Date = DateTime.Now.AddDays(i),
                      Name = GetCountries()[i]
                  });
              }
              return array;
          }
      
          public static List<SalesData> GetSalesDataList2()
          {
              List<SalesData> array = new List<SalesData>();
              for (int i = 0; i < GetCountries().Length; i++)
              {
                  array.Add(new SalesData
                  {
                      Sales = _rnd.Next(100) * 100,
                      Expenses = _rnd.Next(100) * 50,
                      Downloads = _rnd.Next(100),
                      Date = DateTime.Now.AddDays(i),
                      Name = GetCountries()[i]
                  });
              }
              return array;
          }
      
          public NSDate DateTimeToNSDate(DateTime date)
          {
              if (date.Kind == DateTimeKind.Unspecified)
                  date = DateTime.SpecifyKind(date, DateTimeKind.Utc);
              return (NSDate)date;
          }
      
          public DateTime NSDateToDateTime(NSDate date)
          {
              // NSDate has a wider range than DateTime, so clip
              // the converted date to DateTime.Min|MaxValue.
              double secs = date.SecondsSinceReferenceDate;
              if (secs < -63113904000)
                  return DateTime.MinValue;
              if (secs > 252423993599)
                  return DateTime.MaxValue;
                  return (DateTime)date;
          }
      
          // ** static value providers
          public static string[] GetCountries() { return _countries; }
      
          #endregion
      }
      
    2. Add the following code to the ViewDidLoad() method to create mixed charts.
      C#
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      chart.BindingX = "Name";
      
      chart.Series.Add(new ChartSeries() { SeriesName = "Sales", Binding = "Sales,Sales" });
      chart.Series.Add(new ChartSeries() { SeriesName = "Expenses", Binding = "Expenses,Expenses" });
      chart.Series.Add(new ChartSeries() { SeriesName = "Downloads", Binding = "Downloads,Downloads", ChartType = C1.iOS.Chart.ChartType.LineSymbols });
      chart.ItemsSource = SalesData.GetSalesDataList();
      
    See Also