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CategoriesCollection.cs：源码内容

							using System;
using System.Collections;
namespace qminoa.BLL.PM
{
	public class CategoriesCollection : ArrayList
	{
		public enum CategoryFields
		{
			Abbreviation,
			Duration,
			InitValue,
			Name
		}
		public void Sort(CategoryFields sortField, bool isAscending)
		{
			switch (sortField) 
			{
				case CategoryFields.Name:
					base.Sort(new NameComparer());
					break;
				case CategoryFields.Abbreviation:
					base.Sort(new AbbreviationComparer());
					break;
				case CategoryFields.Duration:
					base.Sort(new DurationComparer());
					break;
			}
			if (!isAscending) base.Reverse();
		}
		private sealed class NameComparer : IComparer 
		{
			public int Compare(object x, object y)
			{
				Category first = (Category) x;
				Category second = (Category) y;
				return first.Name.CompareTo(second.Name);
			}
		}
		private sealed class AbbreviationComparer : IComparer 
		{
			public int Compare(object x, object y)
			{
				Category first = (Category) x;
				Category second = (Category) y;
				return first.Abbreviation.CompareTo(second.Abbreviation);
			}
		}
		private sealed class DurationComparer : IComparer 
		{
			public int Compare(object x, object y)
			{
				Category first = (Category) x;
				Category second = (Category) y;
				return first.EstDuration.CompareTo(second.EstDuration);
			}
		}
	}
}

						