using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Data.SqlClient;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace LoginDemo
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void label2_Click(object sender, EventArgs e)
{
}
private void textBox2_TextChanged(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
string username = textBoxUserName.Text.Trim();
string password = textBoxPassWord.Text.Trim();
//string connstr = ConfigurationManager.ConnectionStrings["connectionString"].ToString();
string myConnString = "Data Source=.;Initial Catalog=Test;Persist Security Info=True;User ID=sa;Password=luoluoluo";
SqlConnection sqlConnection = new SqlConnection(myConnString);
sqlConnection.Open();
string sql = "select userid,password from usertable where userid = '" + username + "' and password = '" + password + "'";
SqlCommand sqlCommand = new SqlCommand(sql, sqlConnection);
SqlDataReader sqlDataReader = sqlCommand.ExecuteReader();
if (sqlDataReader.HasRows)
{
MessageBox.Show("SUCESS！", "notice", MessageBoxButtons.OK, MessageBoxIcon.Asterisk);
label1.Text = "Log in :" + username;
FormMain formMain = new FormMain();
formMain.Show();
this.Hide();
}
else
{
MessageBox.Show("FAILED！", "notice", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
sqlConnection.Close();
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
private void button2_Click(object sender, EventArgs e)
{
Application.Exit();
}
private void Form1_Load(object sender, EventArgs e)
{
}
}
}
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace LoginDemo
{
public partial class FormMain : Form
{
public FormMain()
{
InitializeComponent();
}
private void FormMain_Load(object sender, EventArgs e)
{
this.usertableTableAdapter.Fill(this.testDataSet.usertable);
}
private void button1_Click(object sender, EventArgs e)
{
Application.Exit();
}
}
}