login.cs

进存销系统..适合书店的进销存..功能可以满足一般的需求.很简单

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

namespace BookStore.Forms
{
    public partial class Login : Form
    {
        public Login()
        {
            InitializeComponent();
        }

        private static bool canLogin = false;
        public static int UserID = 0;
        private string UserPWD = "***********";

        public bool CanLogin
        {
            get { return canLogin; }
            set { canLogin = value; }
        }

        

        private void btn_OK_Click(object sender, EventArgs e)
        {
            
            try
            {
                UserID = int.Parse(tb_User.Text.ToString());
            }
            catch
            {
                MessageBox.Show("账户格式不正确！");
                return;
            }
            string select = "select PassWord from Users where UserID=" + UserID;
            
            try
            {
                UserPWD = DataAccess.Narnu.GetObjectBySqlString(select).ToString();
            }
            catch
            {
                MessageBox.Show("你输入的用户不存在！");
                return;
            }
            if (this.tb_PWD.Text == UserPWD)
            {
                canLogin=true;
                this.Close();
            }
            else
            {
                MessageBox.Show("你输入的秘密不正确！");
                return;
            }
        }

        private void btn_Cancel_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}