readerlogin.cs

这是个C#做成的图书管理系统,请大家参考,多提建议

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

namespace BookMS
{
    public partial class ReaderLogin : Form
    {
        public ReaderLogin()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            DataSet ds = new DataSet("LoginDs");

            if (File.Exists("..\\..\\LoginDs.ds"))
            {
                ds.ReadXml("..\\..\\LoginDs.ds");

                if (textBox1.Text != "" && textBox2.Text != "")
                {
                    try
                    {
                        ds.Tables["userTab"].PrimaryKey = new DataColumn[] { ds.Tables["userTab"].Columns["userID"] };
                        DataRow dr = ds.Tables["userTab"].Rows.Find(textBox1.Text);

                        if (dr["userPwd"].ToString() == textBox2.Text)
                        {
                            MessageBox.Show("登录成功！");
                            BookBorrowCenter ublc = new BookBorrowCenter();
                            ublc.Show();
                            this.Close();
                        }
                        else
                        {
                            MessageBox.Show("登录失败！");
                        }
                    }
                    catch (Exception)
                    {
                        MessageBox.Show("无此用户！");
                    }
                }
                else
                {
                    MessageBox.Show("请输入帐号和密码！");
                }
            }
            else 
            {
                MessageBox.Show("请与管理员确认服务是否启动","提示",MessageBoxButtons.RetryCancel);
            }
        }

        private void button2_Click(object sender, EventArgs e)
        {
            
            Books f1 = new Books();           
            f1.Visible=true;

            this.Close();
        }
    }
}