private bool CheckUsernameAndPassword()
{
ClearErrors();
bool isValid = CheckControlHasText(txtUsername, "Must Enter Username") & CheckControlHasText(txtPassword, "Must Enter Password");
if (isValid)
{
if (!MyController.IsManager(txtUsername.Text, txtPassword.Text))
{
errorProvider.SetError(txtUsername, "The login information provided is invalid.");
isValid = false;
}
}
return(isValid);
}