筆記
int vPrice;
bool result = int.TryParse(txtPrice.Text.Trim(), out vPrice);
if (result)
{
vPrice = int.Parse(Others.PreventSQLInjection(txtPrice.Text.Trim()));
if (vPrice < 0)
{
//error message...
return;
}
}
else
{
//error message...
return;
}