void gvBind() //to bind the discount coupon into the gridview
{
List <DiscountCoupon> discountCoupons = DiscountCouponDB.getAllDiscountCoupon();
gvDiscount.DataSource = discountCoupons;
gvDiscount.DataBind();
}
protected void btnAdd_Click(object sender, EventArgs e) //add the new discount coupon
{
Admin a = (Admin)Session["admin"];
double disAMT;
if (tbxAMT.Text == "")
{
disAMT = 0;
}
else
{
disAMT = Convert.ToDouble(tbxAMT.Text);
}
DiscountCoupon dc = new DiscountCoupon()
{
CouponCode = tbxCc.Text,
Name = tbxName.Text,
Description = tbxDesc.Text,
Percentage = tbxPercentage.Text,
Amount = disAMT,
StartDate = Convert.ToDateTime(tbxSd.Text),
EndDate = Convert.ToDateTime(tbxEd.Text),
AdminID = a
};
if (Convert.ToDateTime(tbxSd.Text) < DateTime.Now) //to check the start date must be future and cannot be past
{
lblOutput.Text = "Start date must be in the future";
}
else
{
if (Convert.ToDateTime(tbxEd.Text) < Convert.ToDateTime(tbxSd.Text)) //to check end date cannot be before the start date
{
lblOutput.Text = "End date cannot be before the start date";
}
else
{
try
{
int id = DiscountCouponDB.addDiscountCoupon(dc); //add row into the database
lblOutput.Text = id + "Added Successfully!";
gvBind();
tbxAMT.Text = "";
tbxCc.Text = "";
tbxDesc.Text = "";
tbxEd.Text = "";
tbxName.Text = "";
tbxPercentage.Text = "";
tbxSd.Text = "";
}
catch (Exception ex)
{
lblOutput.Text = "Cannot Add!" + ex.Message; //to show the error message cannot add the discount coupon
}
}
}
}
//if user apply with the discount coupon
protected void btnApply_Click(object sender, EventArgs e)
{
//retrieve the shopping cart session
ShoppingCart sc = (ShoppingCart)Session["cart"];
//initialize the total amount with double
double tAmt = Convert.ToDouble(sc.TotalPrice);
//get discount coupon from database
DiscountCoupon dc = DiscountCouponDB.getDiscountCouponByCode(tbxDC.Text);
//check if discount coupon is not null
if (dc != null)
{
if (dc.EndDate > DateTime.Now) //check the enddate from datetime.now functions
{
Session["DC"] = dc; //create a session for discount coupon
if (dc.Percentage == null) // check if the percentage is null
{
double netAMT = sc.TotalPrice - dc.Amount; //total price will be minus from the amount
sc.DiscountedAmt = dc.Amount; //show the amount price of discount coupon
lblDiscountAmt.Text = "$" + dc.Amount; //show with the dollar sign
sc.NetAMount = (tAmt - dc.Amount);
lblNetAmount.Text = "$" + sc.NetAMount;
lblTax.Text = sc.Tax.ToString("C");
lblAmtPayable.Text = sc.AmtPayable.ToString("C");
Session["AmtPayable"] = sc.AmtPayable; //create a session for amt payable
}
else
{
sc.DiscountedAmt = tAmt * Convert.ToDouble(dc.Percentage); //if the amount is null, then the price will be minus from the percentage
sc.NetAMount = tAmt - (tAmt * Convert.ToDouble(dc.Percentage)); //netamount times with discount percentage
lblDiscountAmt.Text = "$" + sc.DiscountedAmt; //show with the dollar sign
lblNetAmount.Text = "$" + sc.NetAMount;
lblTax.Text = sc.Tax.ToString("C");
lblAmtPayable.Text = sc.AmtPayable.ToString("C");
Session["AmtPayable"] = sc.AmtPayable; //create a session for amt payable
}
}
else
{
lblError.Text = "Coupon has expired"; //if the coupon code has expired, show the error message
}
}
else
{
lblError.Text = "Coupon Code is not valid"; //when the coupon code is not valid
}
}
