MxWeiXinPF.DAL/user_message.cs

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

namespace MxWeiXinPF.DAL
{
    /// <summary>
    /// 用户短信息
    /// </summary>
    public partial class user_message
    {
        private string databaseprefix; //数据库表名前缀
        public user_message(string _databaseprefix)
        {
            databaseprefix = _databaseprefix; 
        }

        #region  Method
        /// <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 + "user_message");
            strSql.Append(" where id=@id");
            SqlParameter[] parameters = {
					new SqlParameter("@id", SqlDbType.Int,4)};
            parameters[0].Value = id;

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

        /// <summary>
        /// 返回记录总数
        /// </summary>
        public int GetCount(string strWhere)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select count(*) as H ");
            strSql.Append(" from " + databaseprefix + "user_message ");
            if (strWhere.Trim() != "")
            {
                strSql.Append(" where " + strWhere);
            }
            return Convert.ToInt32(DbHelperSQL.GetSingle(strSql.ToString()));
        }

        /// <summary>
        /// 增加一条数据
        /// </summary>
        public int Add(Model.user_message model)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("insert into " + databaseprefix + "user_message(");
            strSql.Append("type,post_user_name,accept_user_name,is_read,title,content,post_time,read_time)");
            strSql.Append(" values (");