usertypebusiness.cs

本系统是基于三层架构和Ajax控件结合的酒店预订系统

using System;
using System.Collections.Generic;
using System.Text;
using System.Data;
using System.Reflection;
using DBaoBookingManagement.DataAccess;
using DBaoBookingManagement.Entity;

namespace DBaoBookingManagement.BusinessLogic
{
    /// <summary>
    /// 对会员类型进行业务逻辑操作
    /// </summary>
    public class UserTypeBusiness : Business
    {
        private UserTypeAccessor uta = new UserTypeAccessor();

        private static UserTypeBusiness instance = null;
        private UserTypeBusiness() { }//私有构造函数

        /// <summary>
        /// 获取UserTypeBusiness对象
        /// </summary>
        /// <returns></returns>
        public static UserTypeBusiness GetInstance()
        {
            if (instance == null)
            {
                instance = new UserTypeBusiness();
            }
            return instance;
        }

        /// <summary>
        /// 添加会员类型
        /// </summary>
        /// <param name="typeName"></param>
        /// <returns></returns>
        public bool Insert(string typeName)
        {
            UserType ut = new UserType();
            ut.TypeName = typeName;
            try
            {
                return uta.Insert(ut);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 查询所有会员类型
        /// </summary>
        /// <returns></returns>
        public UserType[] QueryAll()
        {
            UserType[] entityList = null;
            try
            {
                DataTable dt = uta.QueryAll();
                entityList = FillEntityList(entityList, dt);
                return entityList;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 根据会员类型ID查询会员类型
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public UserType QueryById(int id)
        {
            UserType entity = null;
            try
            {
                DataTable dt = uta.QueryById(id);
                if (dt.Rows.Count > 0)
                {
                    entity = new UserType();
                    PropertyInfo[] props = typeof(UserType).GetProperties();
                    for (int j = 0; j < props.Length; j++)
                    {
                        string columnName = props[j].Name;
                        object value = dt.Rows[0][columnName];
                        props[j].SetValue(entity, value, null);
                    }
                }
                return entity;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 根据会员级别类型名称查询会员级别类型
        /// </summary>
        /// <param name="typeName"></param>
        /// <returns></returns>
        public UserType QueryByName(string typeName)
        {
            UserType entity = null;
            try
            {
                DataTable dt = uta.QueryByName(typeName);
                if (dt.Rows.Count > 0)
                {
                    entity = new UserType();
                    PropertyInfo[] props = typeof(UserType).GetProperties();
                    for (int j = 0; j < props.Length; j++)
                    {
                        string columnName = props[j].Name;
                        object value = dt.Rows[0][columnName];
                        props[j].SetValue(entity, value, null);
                    }
                }
                return entity;
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 根据会员类型ID删除会员类型
        /// </summary>
        /// <param name="id"></param>
        /// <returns></returns>
        public bool DeleteById(int id)
        {
            try
            {
                return uta.DeleteById(id);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        /// <summary>
        /// 修改会员类型
        /// </summary>
        /// <param name="entity"></param>
        /// <returns></returns>
        public bool Update(int id,string typeName)
        {
            UserType u = new UserType();
            u.TypeId = id;
            u.TypeName = typeName;
            try
            {
                return uta.Update(u);
            }
            catch (Exception ex)
            {
                throw ex;
            }
        }

        //填充实体类列表
        private UserType[] FillEntityList(UserType[] entityList, DataTable dt)
        {
            if (dt.Rows.Count > 0)
            {
                entityList = new UserType[dt.Rows.Count];

                //用反射给实体类赋值
                for (int i = 0; i < entityList.Length; i++)
                {
                    UserType entity = new UserType();
                    PropertyInfo[] props = typeof(UserType).GetProperties();
                    for (int j = 0; j < props.Length; j++)
                    {
                        string columnName = props[j].Name;
                        object value = dt.Rows[i][columnName];
                        props[j].SetValue(entity, value, null);
                    }
                    entityList[i] = entity;
                }
            }
            return entityList;
        }
    }
}