ChartWidget Class

public abstract class ChartWidget : DashboardElementWidget, 
	IDropDownOptions

Public MustInherit Class ChartWidget
	Inherits DashboardElementWidget
	Implements IDropDownOptions

using System;
using System.Collections;
using System.Collections.Generic;
using Dynamicweb.Dashboards.Widgets;
using Dynamicweb.UI.Elements.Displays.Charts;
using Dynamicweb.Extensibility.AddIns;
using Dynamicweb.Extensibility.Editors;

namespace Dynamicweb.Dashboards.Examples
{
    [AddInName("Simple multi-series chart")]
    [AddInDescription("Show simple chart with 2 series")]
    [AddInIcon(Core.UI.Icons.KnownIcon.LineChart)]
    public sealed class SimpleChartWidget : ChartWidget
    {
        /// <summary>
        /// Gets or sets chart legend position
        /// </summary>
        [AddInLabel("Legend position"), AddInParameter("LegendPosition"), AddInParameterEditor(typeof(DropDownParameterEditor), "none=false;container=body")]
        public string LegendPosition { get; set; }

        public SimpleChartWidget()
        {
            Title = "Total cities population";
            ChartType = ChartType.Line;
            InstantFetch = true;
        }

        public override ChartData GetData(IDashboard dashboard, string path)
        {
            var series = new List<double[]> {
                new double[] { 500d, 200d, 150d, 300d },
                new double[] { 300d, 400d, 250d, 100d }
            };

            var data = new ChartData
            {
                Labels = new[] { "London", "New York", "Moscow", "Copenhagen" },
                MultiSeries = series,
                Legends = new[] { "Man", "Woman" },
                LegendPosition = LegendPosition //(LegendPosition)Enum.Parse(typeof(LegendPosition), LegendPosition)
            };

            return data;
        }

        /// <summary>
        /// Return dropdown options
        /// </summary>
        /// <param name="dropdownName"></param>
        /// <returns></returns>
        public override Hashtable GetOptions(string dropdownName)
        {
            var hash = base.GetOptions(dropdownName) ?? new Hashtable();

            if ("LegendPosition".Equals(dropdownName, StringComparison.OrdinalIgnoreCase))
            {
                hash.Add("top", "Top");
                hash.Add("right", "Right");
                hash.Add("bottom", "Bottom");
                hash.Add("left", "Left");
            }
            return hash;
        }

    }
}