private void BtnTest_Click(object sender, EventArgs e)
{
if (String.IsNullOrEmpty(TxtServer.Text) || String.IsNullOrEmpty(TxtUsername.Text) || String.IsNullOrEmpty(TxtPassword.Text))
{
MessageBox.Show("Server information cannot be empty.");
return;
}
SqlOperations.ConnectTest(TxtServer.Text, TxtUsername.Text, TxtPassword.Text);
}