//==== Tính toán
public static long Tinh_Doanh_thu_Laptop(XmlElement Laptop)
{
var Doanh_thu = 0L;
foreach (XmlElement Ban_hang in Laptop.GetElementsByTagName("Ban_hang"))
{
Doanh_thu += long.Parse(Ban_hang.GetAttribute("Tien"));
}
return(Doanh_thu);
}
public static long Tinh_Doanh_thu_San_pham_Nam_hien_hanh(XmlElement San_pham, DateTime Ngay)
{
var Doanh_thu = 0L;
foreach (XmlElement Ban_hang in San_pham.GetElementsByTagName("Ban_hang"))
{
var Ngay_Ban = DateTime.Parse(Ban_hang.GetAttribute("Ngay"));
if (Ngay.Year == Ngay_Ban.Year)
{
Doanh_thu += long.Parse(Ban_hang.GetAttribute("Tien"));
}
}
return(Doanh_thu);
}
public static long Tinh_Doanh_thu_Lap_top(XmlElement Lap_top, DateTime Ngay)
{
var Doanh_thu = 0L;
foreach (XmlElement Ban_hang in Lap_top.GetElementsByTagName("Ban_hang"))
{
var Ngay_Ban = DateTime.Parse(Ban_hang.GetAttribute("Ngay"));
if (Ngay.Day == Ngay_Ban.Day && Ngay.Month == Ngay_Ban.Month && Ngay.Year == Ngay_Ban.Year)
{
Doanh_thu += long.Parse(Ban_hang.GetAttribute("Tien"));
}
}
return(Doanh_thu);
}
public static long Tinh_So_luong_ton_Laptop(XmlElement Laptop)
{
var Ton_Kho = 0L;
var So_Ban = 0L;
var So_Nhap = 0L;
foreach (XmlElement Ban_hang in Laptop.GetElementsByTagName("Ban_hang"))
{
So_Ban += long.Parse(Ban_hang.GetAttribute("So_luong"));
}
foreach (XmlElement Nhap_hang in Laptop.GetElementsByTagName("Nhap_hang"))
{
So_Nhap += long.Parse(Nhap_hang.GetAttribute("So_luong"));
}
Ton_Kho = So_Nhap - So_Ban;
return(Ton_Kho);
}
//==== Tính toán ======
public static long Tinh_So_luong_Ton_San_pham(XmlElement San_pham)
{
var Tong_Nhap_hang = 0L;
foreach (XmlElement Nhap_hang in San_pham.GetElementsByTagName("Nhap_hang"))
{
Tong_Nhap_hang += long.Parse(Nhap_hang.GetAttribute("So_luong"));
}
var Tong_Ban_hang = 0L;
foreach (XmlElement Ban_hang in San_pham.GetElementsByTagName("Ban_hang"))
{
Tong_Ban_hang += long.Parse(Ban_hang.GetAttribute("So_luong"));
}
var So_luong_Ton = Tong_Nhap_hang - Tong_Ban_hang;
return(So_luong_Ton);
}