private void btnAdd_Click(object sender, EventArgs e)
{
Milktea.Quantity = Convert.ToDouble(numQuantity.Value);
Milktea.ComputePrice();
TransactionHistory.priceTotal.Add(Milktea.MilkteaPrice);
Transact.Total = TransactionHistory.priceTotal.Sum();
Transact.isVATable(Transact.Total);
hist = "Milktea: " + Milktea.MilkteaName + "\r\n" + "Size: " + Milktea.Size + "\r\n" + "Sugar Level: " + Milktea.SugarLevel + "\r\n" + "Add-ons: " + Milktea.Sinkers + "\r\n" + "Price: " + Milktea.MilkteaPrice.ToString() + "\r\n";
TransactionHistory.History.Add(hist);
this.Close();
}
private void btnRemove_Click(object sender, EventArgs e)
{
try
{
order = (Convert.ToInt32(txtRemove.Text) - 1);
TransactionHistory.History.RemoveAt(order);
TransactionHistory.priceTotal.RemoveAt(order);
Transact.Total = TransactionHistory.priceTotal.Sum();
Transact.isVATable(Transact.Total);
updateDisplay();
}
catch
{
MessageBox.Show("Please input an existing order");
txtRemove.ResetText();
}
txtRemove.Text = "Type the Order #";
this.txtRemove.Font = new System.Drawing.Font("Microsoft Sans Serif", 7.8F, System.Drawing.FontStyle.Italic, System.Drawing.GraphicsUnit.Point, ((byte)(0)));
this.txtRemove.ForeColor = System.Drawing.Color.Gray;
}