login.aspx.cs

一个功能比较全的Asp.net在线考试系统源码

using System;
using System.Data;
using System.Configuration;
using System.Collections;
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 MyOnLineExam.BusinessLogicLayer;

public partial class Web_Login : System.Web.UI.Page
{    
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
        {
            InitData();//初始化科目列表框
        }
    }
    //初始化考试科目下拉列表框
    protected void InitData()
    {
        Paper paper = new Paper();              //创建Paper对象
        DataSet ds = paper.QueryPaper();        //查询所有可用试卷
        if (ds.Tables[0].Rows.Count >= 1)
        {                        
            ddlPaper.DataSource = ds;           //指名考试科目列表框数据源
            ddlPaper.DataTextField = "PaperName";   //DataTextField显示Name字段值
            ddlPaper.DataValueField = "PaperID";    //DataValueField显示ID字段值
            ddlPaper.DataBind();                //绑定数据
        }
        else
        {
            ddlPaper.Enabled = false;
            imgBtnLogin.Enabled = false;
            lblMessage.Text = "没有试卷！";
        }
    }
    //登录按钮事件
    protected void imgBtnLogin_Click(object sender, ImageClickEventArgs e)
    {
        Users user = new Users();                       //创建Users对象user
        if (user.CheckPassword(txtUserID.Text.Trim()))  //根据用户编号查询用户密码
        {
            if (user.UserPwd == txtPwd.Text.Trim())//输入密码与用户密码相同
            {
                Session["userID"] = txtUserID.Text.Trim();//存储用户编号                
                Session["PaperID"] = ddlPaper.SelectedValue;
                Session["PaperName"] = ddlPaper.SelectedItem.Text;               
                Response.Redirect("UserTest.aspx");    //转向考试界面               
            }
            else//密码错误，给出提示
            {
                lblMessage.Text = "您输入的密码错误！";
            }
        }
        else//用户不存在，给出提示
        {
            lblMessage.Text = "该用户不存在！";
        }
    }
}