ListWidget Class

[AddInIconAttribute(KnownIcon.List)]
public abstract class ListWidget : DashboardElementWidget

<AddInIconAttribute(KnownIcon.List)>
Public MustInherit Class ListWidget
	Inherits DashboardElementWidget

using Dynamicweb.Dashboards.Widgets;
using Dynamicweb.UI.Elements.Displays;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Dynamicweb.Extensibility.AddIns;
using Dynamicweb.Core;

namespace Dynamicweb.Dashboards.Examples
{
    [AddInName("Top files folders size")]
    [AddInDescription("Show files folders sizes")]
    [AddInIcon(Core.UI.Icons.KnownIcon.Healing)]
    public class FilesFolderSizes : ListWidget
    {
        const string Folder = "/Files";

        public FilesFolderSizes()
        {
            Title = "Top space-hogging files folders";
        }

        [AddInParameterEditor("", "")]
        public override int Columns
        {
            get { return base.Columns; }
            set { base.Columns = value; }
        }

        public override IEnumerable<ListViewItem> GetItems(IDashboard dashboard, string path)
        {
            var filesPath = SystemInformation.MapPath(Folder);

            var items = from dirPath in Directory.GetDirectories(filesPath)
                        let dirInfo = new DirectoryInfo(dirPath)
                        let dirSize = Helper.DirSize(dirInfo)
                        orderby dirSize descending
                        select new
                        {
                            Name = dirInfo.Name,
                            Size = dirSize
                        };

            double count;
            string subtitle;
            foreach (var item in items.Take(4))
            {
                Helper.HumanizeByteSize(item.Size, out count, out subtitle);
                yield return new ListViewItem()
                {
                    Icon = Core.UI.Icons.KnownIcon.Folder,
                    Title = item.Name,
                    Hint = string.Format("The folder size {0:0.##} {1}", count, subtitle)
                };
            }
        }
    }
}