using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.Mvc;
using Highsoft.Web.Mvc.Charts;


namespace MVC_Demo.Areas.Highcharts.Controllers.Shared
{
    public partial class SharedController : Controller
    {
        public ActionResult AreaNegative()
        {
            List<double?> johnValues = new List<double?> { 5, 3, 4, 7, 2 };
            List<double?> janeValues = new List<double?> { 2, -2, -3, 2, 1 };
            List<double?> joeValues = new List<double?> { 3, 4, 4, -2, 5 };

            List<AreaSeriesData> johnData = new List<AreaSeriesData>();
            List<AreaSeriesData> janeData = new List<AreaSeriesData>();
            List<AreaSeriesData> joeData = new List<AreaSeriesData>();

            johnValues.ForEach(p => johnData.Add(new AreaSeriesData { Y = p }));
            janeValues.ForEach(p => janeData.Add(new AreaSeriesData { Y = p }));
            joeValues.ForEach(p => joeData.Add(new AreaSeriesData { Y = p }));

            ViewData["johnData"] = johnData;
            ViewData["janeData"] = janeData;
            ViewData["joeData"] = joeData;

            return View();
        }
    }
}

<script src="https://code.highcharts.com/highcharts.js"></script>
<script src="https://code.highcharts.com/modules/exporting.js"></script>

@using Highsoft.Web.Mvc.Charts
@using Highsoft.Web.Mvc.Charts.Rendering;

@{ var chartOptions = new Highcharts
    {
        Title = new Title
        {
            Text = "Area chart with negative values"
        },
        XAxis = new List<XAxis>
    {
                new XAxis
                {
                    Categories =  new List<string> { "Apples", "Oranges", "Pears", "Grapes", "Bananas" }
                }
            },
        Credits = new Credits
        {
            Enabled = false
        },
        Series = new List<Series>
    {
                new AreaSeries
                {
                    Name = "John",
                    Data = @ViewData["johnData"] as List<AreaSeriesData>
                },
                new AreaSeries
                {
                    Name = "Jane",
                    Data = @ViewData["janeData"] as List<AreaSeriesData>
                },
                new AreaSeries
                {
                    Name = "Joe",
                    Data = @ViewData["joeData"] as List<AreaSeriesData>
                }
            }
    };

    chartOptions.ID = "chart";
    var renderer = new HighchartsRenderer(chartOptions);
}

@Html.Raw(renderer.RenderHtml())