DTcms.DAL/users.cs

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

namespace DTcms.DAL
{
    /// <summary>
    /// 用户信息
    /// </summary>
    public partial class users
    {
        public users()
        { }
        #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 dt_users");
            strSql.Append(" where id=@id");
            SqlParameter[] parameters = {
					new SqlParameter("@id", SqlDbType.Int,4)};
            parameters[0].Value = id;

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

        /// <summary>
        /// 检查用户名是否存在
        /// </summary>
        public bool Exists(string user_name)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select count(1) from dt_users");
            strSql.Append(" where user_name=@user_name ");
            SqlParameter[] parameters = {
					new SqlParameter("@user_name", SqlDbType.NVarChar,100)};
            parameters[0].Value = user_name;
            return DbHelperSQL.Exists(strSql.ToString(), parameters);
        }

        /// <summary>
        /// 检查同一IP注册间隔(小时)内是否存在
        /// </summary>
        public bool Exists(string reg_ip, int regctrl)
        {
            StringBuilder strSql = new StringBuilder();
            strSql.Append("select count(1) from dt_users");
            strSql.Append(" where reg_ip=@reg_ip and DATEDIFF(hh,reg_time,getdate())<@regctrl ");
            SqlParameter[] parameters = {
					new SqlParameter("@reg_ip", SqlDbType.NVarChar,30),
                    new SqlParameter("@regctrl", SqlDbType.Int,4)};
            parameters[0].Value = reg_ip;
            parameters[1].Value = regctrl;