DAOResult 类 的代码

using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Collections;
using System.Text;

namespace Business
{
    /// <summary>返回值的状态</summary>
    public enum ResultState : byte //错误状态
    {
        /// <summary>初始状态</summary>
        None,
        /// <summary>没有错误</summary>
        NoError,
        /// <summary>发现错误,并返回错误消息</summary>
        Error_Message,
        /// <summary>发现错误,并返回Exception对象</summary>
        Error_Exception
    }

    /// <summary>多个返回值时，单项返回值类型</summary>
    public enum ResultDataItem : byte   //返回的数值项
    {
        /// <summary>默认项</summary>
        Default,
        /// <summary>新生成主键</summary>
        Identity,
        /// <summary>统计数</summary>

        Scale,
        /// <summary>受影响数量</summary>
        Change,
        /// <summary>拥有总数量</summary>
        Count,
        /// <summary>返回总数量</summary>
        ResultCount
    }

    /// <summary>返回值</summary>
    public class DAOResult  //返回的类，衔接表示层和数据链路层的类
    {
        # region 声明
        private const string Const_ResultDataItem_DataTable = "DataTable"; //多个返回值时，单项返回值类型为Datatable时的主键
        private Hashtable _ResultObject = new Hashtable(); //返回值为哈希的引用

        /// <summary>返回值的状态</summary>
        public ResultState ResultState = ResultState.None;  //返回的初始状态

        /// <summary>当包含错误时,返回错误消息</summary>
        public string ErrorMessage = string.Empty;  //返回的错误消息

        /// <summary>当包含错误时,返回捕捉到的System.Exception</summary>
        public System.Exception ErrorException = null;  //返回错误的异常

        public DAOResult()  //构造函数
        {
        }
        #endregion