The Step Area series uses perpendicular vertical and horizontal lines to connect data points and shades the area under these lines. If a point's value is null, the series draws a gap.
Only null point values result in gaps. undefined values are ignored. Multiple 0 values may look like a gap, but if series points are visible, you can see them in this gap. If you want to remove gaps caused by null values, enable the ignoreEmptyPoints property.
@(Html.DevExtreme().Chart()
.ID("chart")
.CommonSeriesSettings(s => s
.ArgumentField("Year")
.Type(SeriesType.StepArea)
.Steparea(a => a.Point(p => p.Visible(true)))
)
.Series(s => {
s.Add().ValueField("Gold").Name("Gold Medals").Color("#ffd700");
s.Add().ValueField("Silver").Name("Silver Medals").Color("#c0c0c0");
})
.Title(t => t.Text("France Olympic Medals"))
.Export(e => e.Enabled(true))
.Legend(l => l
.VerticalAlignment(VerticalEdge.Bottom)
.HorizontalAlignment(HorizontalAlignment.Center)
)
.ArgumentAxis(a => a
.Label(l => l
.Format(f => f
.Type(Format.Decimal)
)
)
)
.DataSource(new object[] {
new { Year = 1904, Gold = (int?)null, Silver = (int?)null },
new { Year = 1908, Gold = 5, Silver = 5 },
new { Year = 1912, Gold = 7, Silver = 4 },
new { Year = 1916, Gold = (int?)null, Silver = (int?)null },
new { Year = 1920, Gold = 9, Silver = 19 },
new { Year = 1924, Gold = 13, Silver = 15 },
new { Year = 1928, Gold = 6, Silver = 10 },
new { Year = 1932, Gold = 10, Silver = 5 },
new { Year = 1936, Gold = 7, Silver = 6 },
new { Year = 1940, Gold = (int?)null, Silver = (int?)null },
new { Year = 1944, Gold = (int?)null, Silver = (int?)null },
new { Year = 1948, Gold = 10, Silver = 6 },
new { Year = 1952, Gold = 6, Silver = 6 },
new { Year = 1956, Gold = 4, Silver = 4 },
new { Year = 1960, Gold = (int?)null, Silver = 2 },
new { Year = 1964, Gold = 1, Silver = 8 },
new { Year = 1968, Gold = 7, Silver = 3 },
new { Year = 1972, Gold = 2, Silver = 4 },
new { Year = 1976, Gold = 2, Silver = 3 },
new { Year = 1980, Gold = 6, Silver = 5 },
new { Year = 1984, Gold = 5, Silver = 7 },
new { Year = 1988, Gold = 6, Silver = 4 },
new { Year = 1992, Gold = 8, Silver = 5 },
new { Year = 1996, Gold = 15, Silver = 7 },
new { Year = 2000, Gold = 13, Silver = 14 },
new { Year = 2004, Gold = 11, Silver = 9 },
new { Year = 2008, Gold = 7, Silver = 16 },
new { Year = 2012, Gold = 11, Silver = 11 },
new { Year = 2016, Gold = 18, Silver = 18 }
})
)
using DevExtreme.AspNet.Data;
using DevExtreme.AspNet.Mvc;
using DevExtreme.MVC.Demos.Models.SampleData;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.Json;
using System.Web.Mvc;
namespace DevExtreme.MVC.Demos.Controllers {
public class ChartsController : Controller {
public ActionResult NullPointSupport() {
return View();
}
}
}#chart {
height: 440px;
width: 100%;
}