Step Area with Gaps

@(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 } }) )