protected void BtnApply_Click(object sender, EventArgs e)
{
string code = DropdownListDiscount.Text;
DiscountDAO dao = new DiscountDAO();
decimal number = dao.CheckDiscountCode(code);
if (number != -1)
{
bool checkAlreadyUsed = dao.CheckAlreadyUsedDiscount(code, 1);
if (checkAlreadyUsed == false)
{
PriceDiscount.Text = (CalculatePrice() * ((double)number / 100)).ToString();
lblTotalAmount.Text = (CalculatePrice() * ((double)(100 - number)) / 100).ToString();
litDiscount.Text = "";
}
else
{
litDiscount.Text = "Your code is already used ";
}
}
else
{
litDiscount.Text = "Your code is not valid";
}
}