private void buttonLogin_Click(object sender, EventArgs e)
{
Connect connect = new Connect();
DataTable dataTable = new DataTable();
MySqlDataAdapter adapter = new MySqlDataAdapter();
MySqlCommand command = new MySqlCommand();
string query = "SELECT * FROM `user` WHERE `username`=@usn AND `password`=@pass";
command.CommandText = query;
command.Connection = connect.GetConnection();
command.Parameters.Add("@usn", MySqlDbType.VarChar).Value = textBoxUsername.Text;
command.Parameters.Add("@pass", MySqlDbType.VarChar).Value = textBoxPassword.Text;
adapter.SelectCommand = command;
adapter.Fill(dataTable);
//if username and password exist
if (dataTable.Rows.Count > 0)
{
this.Hide();
Main_Form main_Form = new Main_Form();
main_Form.Show();
//MessageBox.Show("YES");
}
else
{
if (textBoxUsername.Text.Trim().Equals(""))
{
MessageBox.Show("Enter your username to login", "Empty Username", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else if (textBoxPassword.Text.Trim().Equals(""))
{
MessageBox.Show("Enter your password to password", "Empty Password", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else
{
MessageBox.Show("Wrong username or password", "Wrong Data", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
private void buttonLogin_Click(object sender, EventArgs e)
{
CONNECT conn = new CONNECT();
DataTable table = new DataTable();
MySqlDataAdapter adapter = new MySqlDataAdapter();
MySqlCommand command = new MySqlCommand();
String query = "SELECT * FROM users WHERE username=@usn AND password=@pass;";
command.Parameters.Add("@usn", MySqlDbType.VarChar).Value = textBoxUsername.Text;
command.Parameters.Add("@pass", MySqlDbType.VarChar).Value = textBoxPassword.Text;
command.CommandText = query;
command.Connection = conn.getConnection();
adapter.SelectCommand = command;
adapter.Fill(table);
if (table.Rows.Count > 0)
{
MessageBox.Show(textBoxUsername.Text.ToUpper() + " has logged in!");
this.Hide();
Main_Form main_Form = new Main_Form();
main_Form.Show();
}
else
{
if (textBoxUsername.Text.Trim().Equals(""))
{
MessageBox.Show("Enter Username", "Empty Username", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
else if (textBoxPassword.Text.Trim().Equals(""))
{
MessageBox.Show("Enter Password", "Empty Password", MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
else
{
MessageBox.Show("Wrong Data", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
private void btnLogin_Click(object sender, EventArgs e)
{
CONNECT conn = new CONNECT();
DataTable table = new DataTable();
MySqlDataAdapter adapter = new MySqlDataAdapter();
MySqlCommand command = new MySqlCommand();
String query = "SELECT * FROM `user` WHERE `username`=@usn AND `password`=@pass";
command.CommandText = query;
command.Connection = conn.getConnection();
command.Parameters.Add("@usn", MySqlDbType.VarChar).Value = txtUsername.Text;
command.Parameters.Add("@pass", MySqlDbType.VarChar).Value = txtPassword.Text;
adapter.SelectCommand = command;
adapter.Fill(table);
if (table.Rows.Count > 0)
{
this.Hide();
Main_Form mform = new Main_Form();
mform.Show();
}
else
{
if (txtUsername.Text.Trim().Equals(""))
{
MessageBox.Show("Enter Your Username to Login", "Empty Username!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else if (txtPassword.Text.Trim().Equals(""))
{
MessageBox.Show("Enter Your Password to Login", "Empty Password!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else
{
MessageBox.Show("This Username or Password doesn't Exists.", "Invalid Data!", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}
private void buttonLogin_Click(object sender, EventArgs e)
{
Connect conn = new Connect();
DataTable table = new DataTable();
MySqlDataAdapter adapter = new MySqlDataAdapter();
MySqlCommand command = new MySqlCommand();
String query = "SELECT * FROM hotel_db.users WHERE username =@usn AND password=@pass";
command.CommandText = query;
command.Connection = conn.GetConnection();
command.Parameters.Add("@usn", MySqlDbType.VarChar).Value = textBoxUsername.Text;
command.Parameters.Add("@pass", MySqlDbType.VarChar).Value = textBoxPassword.Text;
adapter.SelectCommand = command;
adapter.Fill(table);
if (table.Rows.Count > 0)
{
this.Hide();
Main_Form mform = new Main_Form();
mform.Show();
}
else
{
if (textBoxUsername.Text.Trim().Equals(""))
{
MessageBox.Show("Enter Your Username to Login", "Empty Username", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else if (textBoxPassword.Text.Trim().Equals(""))
{
MessageBox.Show("Enter Your Paswword to Login", "Empty Password", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
else
{
MessageBox.Show("This Username or Password doesn't exists", "Wrong Data", MessageBoxButtons.OK, MessageBoxIcon.Error);
}
}
}