user.cs

一个比较小型的学生管理系统

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 System.Data.OleDb;
/// <summary>
/// user 的摘要说明
/// </summary>
namespace sms
{    
    public class user
    {
        private DataAccess DataAs;
        public user()
        {
        }
        public bool Login(string UserID, string UserPwd)
        {
            DataAs = new DataAccess();
            DataTable dt = DataAs.CreateDatatable("select 1 from [users] where User_id ='" + UserID + "' and User_password ='" + UserPwd+"'");
            if (dt.Rows.Count > 0)
            {
                dt.Dispose();
                return true;
            }
            else
            {
                dt.Dispose();
                return false;
            }
        }
        public OleDbDataReader GetUser(string UserID, string UserPwd)
        {
            DataAs = new DataAccess();
            string strSql = "select User_id,User_password,User_power from [users] where User_id ='" + UserID + "' and User_password ='" + UserPwd + "'";
            OleDbDataReader dr = DataAs.GetDatareader(strSql);
            return dr;
        }
        public bool UpdateUserPwd(string UserID, string UserPwd)
        {
            DataAs = new DataAccess();
            bool Result = DataAs.ExecSql("update [users] set User_password ='" + UserPwd + "' where User_id ='" + UserID + "'");
            return Result;
        }
    }
}