frmlogin.cs

图书管理系统

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using Library.Data;

namespace Library
{
    public partial class frmLogin : Form
    {
        /// <summary>
        /// 是否登录字段
        /// </summary>
        private bool isLogin = false;

        public frmLogin()
        {
            InitializeComponent();
        }

        /// <summary>
        /// 是否登录属性
        /// </summary>
        public bool IsLogin
        {
            get { return isLogin; }
            set { isLogin = value; }
        }

        /// <summary>
        /// 窗体关闭事件
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void frmLogin_FormClosing(object sender, FormClosingEventArgs e)
        {
            if (!isLogin)
            {
                ((frmMain)this.MdiParent).CreateLoginForm();
            }
        }

        /// <summary>
        /// 退出按钮点击
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnExit_Click(object sender, EventArgs e)
        {
            this.MdiParent.Close();
        }

        /// <summary>
        /// 登录按钮点击
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void btnLogin_Click(object sender, EventArgs e)
        {
            IDataReader dr = Library.Data.User.FetchByParameter("name", txtName.Text);
            dr.Read();
            User user = new User(dr["id"].ToString());
            if (user.Password==txtPassword.Text)
            {
                isLogin = true;
                ((frmMain) this.MdiParent).ToolStripStatusLabel.Text = user.Name + " 于 " +
                                                                       DateTime.Now.ToString() + " 成功登录";
                this.Close();
            }
        }
    }
}