formdenglu.cs

超市进销存管理系统 Visual Studio 2005+SQL Sever2005

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using _10901BS;

namespace _10901BS
{
    public partial class formDenglu : Form
    {
        public static string str1;
        public formDenglu()
        {
            InitializeComponent();
        }
        SqlConnection cn = new SqlConnection();
        SqlCommand cm = new SqlCommand();
        int i;

        private void Form1_Load(object sender, EventArgs e)
        {

            if (cn.State == ConnectionState.Closed)
            {
                cn.ConnectionString = "Data Source=.;Initial Catalog=110901DB;Integrated Security=True";
               cn.Open();
            }
        }

        private void btnDL_Click(object sender, EventArgs e)
        {
           
            cm.Connection = cn;
            cm.CommandText = "select * from yhxxBiao where yhID='" + this.txtYHM.Text + "'and yhPSD='" + this.txtMM.Text + "'and useAb=0";
            SqlDataReader dr = cm.ExecuteReader();
            if (dr.Read())
            {

                dr.Close();
                
                MessageBox.Show("恭喜您登陆成功!");
                this.Hide();
            }
            else
            {
                dr.Close();
                MessageBox.Show("对不起您输入的信息错误，请从新输入，谢谢!");
                txtYHM.Focus();
                i++;
                if (i == 3)
                {
                    if (this.txtYHM.Text == "0001")
                    {
                         MessageBox.Show("对不起您的帐号已经被冻结请与管理员联系!");
                        Application.Exit();//关闭所有资源
                    }
                    cm.CommandText = "update yhglBiao set useAb=1 where yhID='" +this.txtYHM.Text + "'";
                    cm.ExecuteNonQuery();
                    MessageBox.Show("对不起您的帐号已经被冻结请与管理员联系!");
                    i = 0;
                }
                txtMM.Text = "";
                txtYHM.Text = "";
            }
        }

        private void btnqx_Click(object sender, EventArgs e)
        {  
            Application.Exit();//关闭所有资源
        }

        private void txtYHM_TextChanged(object sender, EventArgs e)
        {
            str1 = this.txtYHM.Text;
        }


    }

}