Is there a way to add series to a chart without knowing ahead of time how many series will be in it? For example I want to graph something on the X axis by month over a variable selection of years. Each year would be a series.
I thought about binding to IEnumerable while grouping by year--and creating a series on each group item, but I couldn't really envision the code.
I got this to work with a custom helper (HtmlHelper extension method). I adapted an example from http://demos.shieldui.com/aspnet/aspnet-chart/programmatic-chart-creation, but that example is for ASP.NET web forms. I'm doing MVC. My solution involved using the ChartBuilder<> object within a helper.
public static class ChartExtensions
{
public static ChartBuilder<PropertyPivotAverageAmountPerMonth_Result> AnnualComparison(this HtmlHelper html, int id)
{
MyDatabaseEntities db = new MyDatabaseEntities();
var results = db.PropertyPivotAverageAmountPerMonth(id);
ChartBuilder<PropertyPivotAverageAmountPerMonth_Result> chart = new ChartBuilder<PropertyPivotAverageAmountPerMonth_Result>(html, results);
chart.AxisX(axisX => axisX.CategoricalValues("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"));
chart.PrimaryHeader(header => header.Text("Annual Cost Comparisons"));
foreach (var year in results)
{
chart.DataSeries(s => s.Line()
.CollectionAlias(year.Year.ToString())
.Data(new object[]
{
new { x=0, y=year.C1 },
new { x=1, y=year.C2 },
new { x=2, y=year.C3 },
new { x=3, y=year.C4 },
new { x=4, y=year.C5 },
new { x=5, y=year.C6 },
new { x=6, y=year.C7 },
new { x=7, y=year.C8 },
new { x=8, y=year.C9 },
new { x=9, y=year.C10 },
new { x=10, y=year.C11 },
new { x=11, y=year.C12 }
}));
}
return chart;
}