private void addItemButton_Click(object sender, EventArgs e)
{
aProduct=new Product();
aProduct.ProductId = productIdTextBox.Text;
aProduct.Quantity = Convert.ToInt32(quantityTextBox.Text);
MessageBox.Show( aShop.AddItem(aProduct.ProductId,aProduct.Quantity));
}
private bool HasThisProductIdExist(string prouctId)
{
foreach (Product product in productList)
{
if (product.ProductId== prouctId)
{
aProduct = product;
return true;
}
}
return false;
}
public string AddItem(string productId, int quantity)
{
string msg = "";
if (HasThisProductIdExist(productId))
{
aProduct.Quantity += quantity;
msg = "Already exist! Quantity added";
}
else
{
aProduct = new Product();
aProduct.ProductId = productId;
aProduct.Quantity = quantity;
productList.Add(aProduct);
msg="Item added";
}
return msg;
}
