citycollection.cs

此项目是用asp.net开发的航班查询系统

using System;
using System.Collections;

namespace 数据访问.实体类
{
	/// <summary>
	/// CityCollection 的摘要说明。
	/// </summary>
	public class CityCollection:CollectionBase
	{
		/// <summary>
		/// City 索引器
		/// </summary>
		public City this[int index]
		{
			get
			{
				return (City) List[index];
			}
			set
			{
				List[index]=value;
			}
		}
		
		/// <summary>
		/// 按城市编号查找城市信息
		/// </summary>
		/// <param name="cityId"></param>
		/// <returns></returns>
		public City FindCityById(int cityId)
		{
			foreach(City city in List)
			{
				if(city.CityId==cityId)
				{
					return city;
				}
			}
			return null;
		}

		/// <summary>
		/// 添加城市信息
		/// </summary>
		/// <param name="value"></param>
		/// <returns></returns>
		public int Add(City value)
		{
			return (List.Add(value));
		}

		/// <summary>
		/// 查询城市的索引
		/// </summary>
		/// <param name="value"></param>
		/// <returns></returns>
		public int IndexOf(City value)
		{
			return (List.IndexOf(value));
		}

		/// <summary>
		/// 修改城市信息
		/// </summary>
		/// <param name="index"></param>
		/// <param name="value"></param>
		public void Insert(int index,City value)
		{
			List.Insert(index,value);
		}

		/// <summary>
		/// 删除城市信息
		/// </summary>
		/// <param name="value"></param>
		public void Remove(City value)
		{
			List.Remove(value);
		}

		/// <summary>
		/// 查询城市信息是否存在
		/// </summary>
		/// <param name="value"></param>
		/// <returns></returns>
		public bool Contains(City value)
		{
			return (List.Contains(value));
		}
	}
}