insert.cs

火车票的销售系统

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

 
namespace pwxt
{
    
    public partial class insert : Form
    {
        private string adminname = "admin";
        private string adminpasd = "1100";
        public string username;
        public string userpasd;
        public insert()
        {
            InitializeComponent();
        }

      

        private void button1_Click(object sender, EventArgs e)
        {
           
           username = textBox1.Text;
           userpasd = textBox2.Text;
            if (username == adminname & userpasd == adminpasd)
            {
                MessageBox.Show("登录成功");
               
                this.Visible = false; 
                menu_class();
                this.Visible = true;

            }
            else
            {

                SqlConnection conn = new SqlConnection(System.Configuration.ConfigurationSettings.AppSettings["connectionstring"]);
                string strcmd="SELECT * FROM USertable WHERE name='"+username+"'AND pasd='"+userpasd+"'";
                SqlCommand cmd = new SqlCommand(strcmd, conn);
                conn.Open();
                SqlDataReader odr = null;
                odr = cmd.ExecuteReader();

                if (odr.Read() == false)
                {

                    MessageBox.Show("用户名错误或者密码错误");
                    this.Show();
                }
                else
                {
                    MessageBox.Show("登录成功");
                    this.Visible = false; 
                    menu_class();
                    this.Visible = true;
                }
                conn.Close();
            }
            
           
        }
        private void button2_Click(object sender, EventArgs e)
        {
            this.Visible = false;
            try
            {
                zhuce zc = new zhuce();
                if (zc.ShowDialog() == DialogResult.OK)
                {

                }
            }
            catch (Exception e1)
            {

                MessageBox.Show(e1.Message);
            }
            this.Visible = true;
        }
        void menu_class()
        {
            try
            {
                menuclass mc = new menuclass();
                if (username != adminname && userpasd != adminpasd)
                {

                    mc.删除ToolStripMenuItem.Enabled = false;
                  
                    mc.增加ToolStripMenuItem.Enabled = false;

                }
                else
                    mc.button1.Enabled = false;
                if (mc.ShowDialog() == DialogResult.OK)
                {
                    
                }
            }
            catch (Exception e2)
            {

                MessageBox.Show(e2.Message);
            }
        }

        private void button3_Click(object sender, EventArgs e)
        {
            this.Close();
        }
    }
}