UmbracoHelper.TypedCotnentAtRelativeXPath.cs

@using Umbraco.Core.Models;
@using Umbraco.Web;
@using System.Collections.Generic;

namespace skttl.UmbracoExtensions
{
  public static class UmbracoHelperExtensions
  {
  
		public static IEnumerable<IPublishedContent> TypedContentAtRelativeXPath(this UmbracoHelper helper, IPublishedContent current, string xpath)
		{
			return helper.TypedContentAtXPath(PathToXPath(current.Path) + xpath);
		}

		public static IPublishedContent TypedContentSingleAtRelativeXPath(this UmbracoHelper helper, IPublishedContent current, string xpath)
		{
			return helper.TypedContentSingleAtXPath(PathToXPath(current.Path) + xpath);
		}

		private static string PathToXPath(string input)
		{
			return string.Join("", input.Split(',').Select(x => "/[@id='" + x + "']")) + "/";
		}
  }
}