DynamicReportSource Null Object Reference Fix

DynamicReportSource.cs

using System.Collections;
using System.Collections.Generic;
using System.Linq;
using DoddleReport;

namespace Hasc.Web.Helpers
{
	public static class DynamicReportSourceExtensions
	{
		public static IReportSource ToReportSource(this IEnumerable<dynamic> source)
		{
			return new DynamicReportSource(source);
		}
	}

	/// <summary>
	/// Generate a Report for a collection of dynamic ExpandoObjects
	/// </summary>
	public class DynamicReportSource : IReportSource
	{
		private readonly IEnumerable<dynamic> _source;

		public DynamicReportSource(IEnumerable<dynamic> source)
		{
			_source = source;
		}

		public ReportFieldCollection GetFields()
		{
			var fields = new ReportFieldCollection();
			var item = _source.FirstOrDefault();

			if (item == null)
				return fields;

			foreach (var t in item)
			{
				fields.Add(t.Key, (t.Value ?? new object()).GetType());
			}

			return fields;
		}

		public IEnumerable GetItems()
		{
			return _source;
		}

		public object GetFieldValue(object dataItem, string fieldName)
		{
			if (dataItem == null)
				return string.Empty;

			var di = (IDictionary<string, object>)dataItem;
			return di[fieldName];
		}
	}
}