NET--可绑定可排序列表

/// <summary>

	/// BindingList with sorting feature

	/// </summary>

	/// <typeparam name="T"></typeparam>

	public class SortableBindingList<T> : BindingList<T>

	{

		private bool isSortedCore = true;

		private ListSortDirection sortDirectionCore = ListSortDirection.Ascending;

		private PropertyDescriptor sortPropertyCore = null;

		private string defaultSortItem;



		/// <summary>

		/// constructor

		/// </summary>

		public SortableBindingList() : base() { }



		/// <summary>

		/// constructor

		/// </summary>

		/// <param name="list"></param>

		public SortableBindingList(IList<T> list) : base(list) { }



		protected override bool SupportsSortingCore

		{

			get { return true; }

		}



		protected override bool SupportsSearchingCore

		{

			get { return true; }

		}



		protected override bool IsSortedCore

		{

			get { return isSortedCore; }

		}



		protected override ListSortDirection SortDirectionCore

		{

			get { return sortDirectionCore; }

		}



		protected override PropertyDescriptor SortPropertyCore

		{

			get { return sortPropertyCore; }

		}



		protected override int FindCore(PropertyDescriptor prop, object key)

		{

			for (int i = 0; i < this.Count; i++)

			{

				if (Equals(prop.GetValue(this[i]), key)) return i;

			}

			return -1;

		}



		protected override void ApplySortCore(PropertyDescriptor prop, ListSortDirection direction)

		{

			isSortedCore = true;

			sortPropertyCore = prop;

			sortDirectionCore = direction;

			Sort();

		}



		protected override void RemoveSortCore()

		{

			if (isSortedCore)

			{

				isSortedCore = false;

				sortPropertyCore = null;

				sortDirectionCore = ListSortDirection.Ascending;

				Sort();

			}

		}



		/// <summary>

		/// Default sort field

		/// </summary>

		public string DefaultSortItem

		{

			get { return defaultSortItem; }

			set

			{

				if (defaultSortItem != value)

				{

					defaultSortItem = value;

					Sort();

				}

			}

		}



		private void Sort()

		{

			List<T> list = (this.Items as List<T>);

			list.Sort(CompareCore);

			ResetBindings();

		}



		private int CompareCore(T o1, T o2)

		{

			int ret = 0;

			if (SortPropertyCore != null)

			{

				ret = CompareValue(SortPropertyCore.GetValue(o1), SortPropertyCore.GetValue(o2), SortPropertyCore.PropertyType);

			}

			if (ret == 0 && DefaultSortItem != null)

			{

				PropertyInfo property = typeof(T).GetProperty(DefaultSortItem, BindingFlags.Public | BindingFlags.GetProperty | BindingFlags.Instance | BindingFlags.IgnoreCase, null, null, new Type[0], null);

				if (property != null)

				{

					ret = CompareValue(property.GetValue(o1, null), property.GetValue(o2, null), property.PropertyType);

				}

			}

			if (SortDirectionCore == ListSortDirection.Descending) ret = -ret;

			return ret;

		}



		private static int CompareValue(object o1, object o2, Type type)

		{

			//这里改成自己定义的比较 

			if (o1 == null)

				return o2 == null ? 0 : -1;

			if (o2 == null)

				return 1;

			if (type.IsPrimitive || type.IsEnum || IsNullablePrimitiveType(type))

				return Convert.ToDouble(o1).CompareTo(Convert.ToDouble(o2));

			if (type == typeof (DateTime) || type == typeof (DateTime?))

				return Convert.ToDateTime(o1).CompareTo(o2);

			return String.Compare(o1.ToString().Trim(), o2.ToString().Trim());

		}



		/// <summary>  

		/// 判断是否为基元类型可空类型  

		/// </summary>  

		/// <param name="type">类型</param>  

		/// <returns>是否</returns>  

		public static bool IsNullablePrimitiveType(Type type)

		{

			if (!type.IsGenericType)

			{

				return false;

			}

			//泛型的基础类型是否是基元类型

			if (!type.GetGenericArguments()[0].IsPrimitive)

			{

				return false;

			}



			Type genericTypeDefinition = type.GetGenericTypeDefinition();

			return genericTypeDefinition != null && genericTypeDefinition.Equals(typeof (Nullable<>));

		}

	}

　　用法：

dgvDetail.DataSource=  new SortableBindingList<Person>(listPerson);