private void btnLogin_Click(object sender, EventArgs e)
{
User user;
if (string.IsNullOrWhiteSpace(tbUsername.Text) || string.IsNullOrWhiteSpace(tbPassword.Text))
{
MessageBox.Show("Please enter username or password!");
return;
}
if (!userBUS.ExistUsername(tbUsername.Text))
{
MessageBox.Show("Username is not exist!");
return;
}
user = userBUS.GetUserByUserNameAndPassword(tbUsername.Text, tbPassword.Text);
if (user == null)
{
MessageBox.Show("Password is incorrect!");
return;
}
frmInfo form = new frmInfo(user);
this.Hide();
tbPassword.Text = "";
tbUsername.Text = "";
form.ShowDialog();
this.Show();
}