using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using MySql.Data.MySqlClient;
namespace WindowsFormsApplication1
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
MySqlConnection Conn = new MySqlConnection("Database=admin;server=localhost;User Id=root;Password=");
string sql = "select * from user";
MySqlCommand Da = new MySqlCommand(sql, Conn);
Conn.Open();
//MySqlDataAdapter ad = new MySqlDataAdapter();
MySqlDataReader re = Da.ExecuteReader();
//re.Read();
//DataSet a = new DataSet();
string username1 = this.username.Text.Trim();
string password1 = this.password.Text.Trim();
//string u1=re[1].ToString();
//string p1=re[2].ToString();
if (username1 == "" || password1 == "")
{
MessageBox.Show("用户名不能为空");
}
else {
if (re.Read()) {
string u1 = re[1].ToString();
string p1=re[2].ToString();
if (username1 == u1 || password1 == p1)
{
MessageBox.Show("正确");
}
else {
MessageBox.Show("密码错误");
}
}
}
}
}
}
