private void btnDelete_Click(object sender, EventArgs e)
{
wnDm wDm = new wnDm();
int rsNum = wDm.Delete_Metal(txt_metalcd.Text.ToString());
if (rsNum == 0)
{
resetSetting();
MessageBox.Show("성공적으로 삭제하였습니다.");
}
else if (rsNum == 1)
{
MessageBox.Show("삭제에 실패하였습니다.");
}
}