DTcms.DAL/attributes.cs

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using System;
using System.Collections;
using System.Collections.Generic;
using System.Data;
using System.Text;
using System.Data.OleDb;
using DTcms.DBUtility;

namespace DTcms.DAL
{
	/// <summary>
	/// 扩展属性
	/// </summary>
	public partial class attributes
	{
		public attributes()
		{}
		#region  Method
        /// <summary>
        /// 得到最大ID
        /// </summary>
        private int GetMaxId(OleDbConnection conn, OleDbTransaction trans)
        {
            string strSql = "select top 1 id from dt_attributes order by id desc";
            object obj = DbHelperOleDb.GetSingle(conn, trans, strSql);
            if (obj == null)
            {
                return 0;
            }
            else
            {
                return int.Parse(obj.ToString());
            }
        }
		/// <summary>
		/// 是否存在该记录
		/// </summary>
		public bool Exists(int id)
		{
			StringBuilder strSql=new StringBuilder();
			strSql.Append("select count(1) from dt_attributes");
			strSql.Append(" where id=@id");
			OleDbParameter[] parameters = {
					new OleDbParameter("@id", OleDbType.Integer,4)
			};
			parameters[0].Value = id;

			return DbHelperOleDb.Exists(strSql.ToString(),parameters);
		}


		/// <summary>
		/// 增加一条数据
		/// </summary>
		public int Add(DTcms.Model.attributes model)
		{
            int newId;
            using (OleDbConnection conn = new OleDbConnection(DbHelperOleDb.connectionString))
            {
                conn.Open();