private void button2_Click(object sender, EventArgs e)
{
//create object for SQL connection and connect to data source. Go to Server Explorer>right click database>modify connection>advanced>copy from there.
SqlConnection sqlcon = new SqlConnection(@"Data Source=DESKTOP-9D9LNHM\SQLEXPRESS;Initial Catalog=userLogin;Integrated Security=True");
//write sql query to get what the user entered
string query = "select * from logins where username = '******' and '" + textBox2.Text.Trim() + "'";
//new instance of class SqlDataAdapter to fill the data set and update database. Pass in local variable and SqlConnection as parameters.
SqlDataAdapter sda = new SqlDataAdapter(query, sqlcon);
//new instance of class that represents a table in memory data.
DataTable dtbl = new DataTable();
//use Fill to add or refresh rules in specified range in data set. Pass dtbl to sda.
sda.Fill(dtbl);
//once user enters username and password, this if statement will check to see if that row is in the database.
if (dtbl.Rows.Count == 1)
{
//if username and password are correct, it will pull up the success form and hide the login form.
frmLoggedIn objfrmLoggedIn = new frmLoggedIn();
this.Hide();
objfrmLoggedIn.Show();
}
//if the username/password does not match something in the database, it will show this error message.
else
{
MessageBox.Show("Please check your username and password");
}
}
private void button1_Click(object sender, EventArgs e)
{
SqlConnection sqlconn = new SqlConnection(@"Data Source=KAGUYA\SQLEXPRESS;Initial Catalog=userLogin;Integrated Security=True");
string query = "select * from logins where username='******'and password='******'";
SqlDataAdapter sda = new SqlDataAdapter(query, sqlconn);
DataTable dtbl = new DataTable();
sda.Fill(dtbl);
if (dtbl.Rows.Count == 1)
{
frmLoggedIn objfrmLoggedIn = new frmLoggedIn();
this.Hide();
objfrmLoggedIn.Show();
}
else
{
MessageBox.Show("Please check your credentials and try again.");
}
}
private void button1_Click(object sender, EventArgs e)
{
SqlConnection sqlcon = new SqlConnection(@"Data Source=DVRLT4VKDYF2;Initial Catalog=UdemyUserLogin;Integrated Security=True");
string query = "select * from logins where username ='******'and password ='******'";
SqlDataAdapter sda = new SqlDataAdapter(query, sqlcon);
DataTable dtb1 = new DataTable();
sda.Fill(dtb1);
if (dtb1.Rows.Count == 1)
{
frmLoggedIn objfrmLoggedIn = new frmLoggedIn();
this.Hide();
objfrmLoggedIn.Show();
}
else
{
MessageBox.Show("Please check your username and password");
}
}
