login.aspx.cs

图书管理的相关流程,借书还书流程,比较详细

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;

public partial class Login : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {

    }

    //用户登录验证
    protected void Button1_Click(object sender, EventArgs e)
    {
        //搜索用户信息并实例化
        string strSql = "SELECT [userID],[userLoginID],[userPwd],[userName],[userStatus] FROM [userInfo] WHERE [userLoginID] ='" + UserLoginID.Text + "'";
        UserInfo userinfo = new UserInfo();
        userinfo = DBhelper.sqlUserInfo(strSql);

        //进行登录验证，用户信息为空则用户不存在
        if (userinfo == null)
        {
            txtMsg.Text = "用户不存在！";
        }
        //用户信息不为空，则进行密码验证，密码不一致则提示错误信息
        else if (userinfo.UserPwd.Equals(UserPwd.Text))
        {
            //利用Session传递用户编号至下一页面
            Session["uid"] = userinfo.UserID;
            Response.Redirect("BorrowManager.aspx");
        }
        else
        {

            txtMsg.Text = "您的密码错误！";

        }
    }
    protected void Button2_Click(object sender, EventArgs e)
    {
        UserLoginID.Text = "";
        UserPwd.Text = "";
    }
}