MxWeiXinPF.DAL/article_attribute_field.cs

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using System;
using System.Data;
using System.Text;
using System.Collections.Generic;
using System.Data.SqlClient;
using MxWeiXinPF.DBUtility;
using MxWeiXinPF.Common;

namespace MxWeiXinPF.DAL
{
    /// <summary>
    /// 扩展属性数据访问类:article_attribute_field
    /// </summary>
    public partial class article_attribute_field
    {
        private string databaseprefix; //数据库表名前缀
        public article_attribute_field(string _databaseprefix)
        {
            databaseprefix = _databaseprefix;
        }

        #region 基本方法========================================
        /// <summary>
        /// 是否存在该记录
        /// </summary>
        public bool Exists(int id)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select count(1) from " + databaseprefix + "article_attribute_field");
            strSql.Append(" where id=@id ");
            SqlParameter[] parameters = {
					new SqlParameter("@id", SqlDbType.Int,4)};
            parameters[0].Value = id;

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

        /// <summary>
        /// 查询是否存在列
        /// </summary>
        public bool Exists(string column_name)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select count(1) from " + databaseprefix + "article_attribute_field");
            strSql.Append(" where name=@name ");
            SqlParameter[] parameters = {
					new SqlParameter("@name", SqlDbType.NVarChar,100)};
            parameters[0].Value = column_name;

            StringBuilder strSql2 = new StringBuilder();
            strSql2.Append("select count(0) from syscolumns");
            strSql2.Append(" where id=object_id('" + databaseprefix + "article') and name=@name ");
            SqlParameter[] parameters2 = {
					new SqlParameter("@name", SqlDbType.NVarChar,100)};
            parameters2[0].Value = column_name;

            if (DbHelperSQL.Exists(strSql.ToString(), parameters) || DbHelperSQL.Exists(strSql2.ToString(), parameters2))
            {
                return true;
            }