/ThinkEmailFomatter/Utilities/Extensions/LinqComparer.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.IO;
using System.Xml;
using System.Xml.Linq;
using ThinkEmailFormatter.Models;
using System.Web.Mvc;
using Microsoft.Practices.EnterpriseLibrary.Logging;
using System.Diagnostics;
using System.Text;

namespace ThinkEmailFormatter.Models.Extensions
{
    public class FilterComparer : IComparer<Filter>
    {
        public int Compare(Filter x, Filter y)
        {
            int xOrderCode = x.OrderCode == null ? 0 : x.OrderCode.Id;
            int xSourceCode = x.SourceCode == null ? 0 : x.SourceCode.Id;
            int xSubDef = x.SubscriptionDefinition == null ? 0 : x.SubscriptionDefinition.Id;

            int yOrderCode = y.OrderCode == null ? 0 : y.OrderCode.Id;
            int ySourceCode = y.SourceCode == null ? 0 : y.SourceCode.Id;
            int ySubDef = y.SubscriptionDefinition == null ? 0 : y.SubscriptionDefinition.Id;

            if (xSourceCode > ySourceCode)
                return 1;
            else if (xSourceCode == ySourceCode)
            {
                if (xSubDef > ySubDef)
                    return 1;
                else if (xSubDef == ySubDef)
                {
                    if (xOrderCode > yOrderCode)
                        return 1;
                    else if (xOrderCode == yOrderCode)
                    {
                        return 0;
                    }
                    else
                        return -1;
                }
                else
                    return -1;
            }
            else
                return -1;
        }
    }
}