App_Code/DAO/AdminDAO.cs

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using System;
using System.Data;
using System.Configuration;
using System.Web;
using System.Web.Security;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.WebControls.WebParts;
using System.Web.UI.HtmlControls;

using Salary.Model;
using Salary.DB;

namespace Salary.DAO
{
    /// <summary>
    /// AdminDAO 的摘要说明:关于管理员信息操作的业务逻辑
    /// </summary>
    public class AdminDAO
    {
        private string errMessage;    //登陆失败原因
        public string getErrMessage() { return this.errMessage; }
        public AdminDAO()
        {
            this.errMessage = "";
        }

        //判断用户的登陆管理权限
        public bool checkAdmin(Admin admin)
        {
            string queryString;
            bool hasUser, isPasswordRight;

            //首先在数据库中查询该管理帐号是否存在
            queryString = "select * from admin where adminUserName = " + SqlString.GetQuotedString(admin.getAdminUsername());
            DataBase db = new DataBase();
            hasUser = db.GetRecord(queryString);
            if (false == hasUser)
            {
                errMessage = "对不起，用户名不存在!";
                return false;
            }

            //再查询数据库该管理帐号的密码是否正确
            queryString = "select * from admin where adminUserName = " + SqlString.GetQuotedString(admin.getAdminUsername());
            queryString = queryString + " and adminPassword = " + SqlString.GetQuotedString(admin.getAdminPassword());
            isPasswordRight = db.GetRecord(queryString);
            if (false == isPasswordRight)
            {
                errMessage = "对不起，用户密码错误!";
                return false;
            }

            return true;
        }

        //修改登陆密码
        public bool ChangePassword(Admin admin)
        {
            string updateString = "update admin set adminPassword=" + SqlString.GetQuotedString(admin.getAdminPassword());