orchard widget

// latestcommentswidgetdriver.cs
using LatestComments.Models;
using Orchard.ContentManagement;
using Orchard.ContentManagement.Drivers;

namespace LatestComments.Drivers
{
    public class LatestCommentsWidgetDriver : ContentPartDriver<LatestCommentsWidgetPart>
    {
        // GET
        protected override DriverResult Display(LatestCommentsWidgetPart part, string displayType, dynamic shapeHelper)
        {
            return ContentShape("Parts_LatestCommentsWidget",
                () => shapeHelper.Parts_LatestCommentsWidget(
                    NumberOfComments: part.NumberOfComments));
        }

        // GET
        protected override DriverResult Editor(LatestCommentsWidgetPart part, dynamic shapeHelper)
        {
            return ContentShape("Parts_LatestComments_Edit",
                () => shapeHelper.EditorTemplate(
                    TemplateName: "Parts/LatestComments",
                    Model: part,
                    Prefix: Prefix));
        }

        // POST
        protected override DriverResult Editor(LatestCommentsWidgetPart part, IUpdateModel updater, dynamic shapeHelper)
        {
            updater.TryUpdateModel(part, Prefix, null, null);
            return Editor(part, shapeHelper);
        }
		
		protected override void Importing(LatestCommentsWidgetPart part, Orchard.ContentManagement.Handlers.ImportContentContext context) {
            var partName = part.PartDefinition.Name;

            part.NumberOfComments = int.Parse(context.Attribute(partName, "NumberOfComments"));
		}

        protected override void Exporting(LatestCommentsWidgetPart part, Orchard.ContentManagement.Handlers.ExportContentContext context) {
            var partName = part.PartDefinition.Name;

            context.Element(partName).SetAttributeValue("NumberOfComments", part.NumberOfComments);
        }
    }
}

// latestcommentswidgetrecordhandler.cs
using LatestComments.Models;
using Orchard.ContentManagement.Handlers;
using Orchard.Data;

namespace LatestComments.Handlers
{
    public class LatestCommentsWidgetRecordHandler : ContentHandler
    {
        public LatestCommentsWidgetRecordHandler(IRepository<LatestCommentsWidgetRecord> repository)
        {
            Filters.Add(StorageFilter.For(repository));
        }
    }
}

using System.ComponentModel;
using System.ComponentModel.DataAnnotations;
using Orchard.ContentManagement;
using Orchard.ContentManagement.Records;

// latestcommentswidget.cs
namespace LatestComments.Models
{
    public class LatestCommentsWidgetRecord : ContentPartRecord
    {
        public virtual int NumberOfComments { get; set; }
    }

    public class LatestCommentsWidgetPart : ContentPart<LatestCommentsWidgetRecord>
    {
        [Required]
        [DefaultValue("5")]
        [DisplayName("Number of comments to show")]
        public int NumberOfComments
        {
            get { return Record.NumberOfComments; }
            set { Record.NumberOfComments = value; }
        }
    }
}

// latestcommentswidget.cshtml

@model LatestComments.Models.LatestCommentsWidgetPart

<fieldset>
  <legend>Latest Comments</legend>

  <div class="editor-label">
    @T("Number of comments to display"):
  </div>
  <div class="editor-field">
    @Html.TextBoxFor(model => model.NumberOfComments)
    @Html.ValidationMessageFor(model => model.NumberOfComments)
  </div>
</fieldset>

// latestcommentswidget.cshtml

<p>Hello World, showing @Model.NumberOfComments comments!</p>

// migrations.cs
using System.Data;
using LatestComments.Models;
using Orchard.ContentManagement.MetaData;
using Orchard.Core.Contents.Extensions;
using Orchard.Data.Migration;

namespace LatestComments {
    public class Migrations : DataMigrationImpl {

        public int Create() {
            // Creating table LatestCommentsWidgetRecord
            SchemaBuilder.CreateTable("LatestCommentsWidgetRecord", table => table
				.ContentPartRecord()
                .Column("NumberOfComments", DbType.Int32)
			);

            ContentDefinitionManager.AlterPartDefinition(typeof(LatestCommentsWidgetPart).Name,
                builder => builder.Attachable());

            return 1;
        }
    }
}

// module.txt
Name: LatestComments
AntiForgery: enabled
Author: Matthew D. Groves
Website: http://mgroves.com
Version: 1.0
OrchardVersion: 1.0
Description: Display latest comments for a user in a widget.

Features:
    LatestTwitter:
        Description: Display latest comments for a user in a widget.
        Category: Widget
        Dependencies: Orchard.Widgets

placement.info
<Placement>
    <Place Parts_LatestCommentsWidget_Edit="Content:3"/>
    <Place Parts_LatestCommentsWidget="Content:3"/>
</Placement>