public bool suaSachTrongGioHang(Ctgh ctgh)
{
doc = new XmlDocument(); //Tao moi 1 doi tuong XmlDocument
doc.Load(fileName); //Load file xml theo duong dan
list = new List <Ctgh>();
loadDataFromDoc(doc, fileName, list);
if (!isExistId(list, ctgh.MaGioHang)) //Kiem tra ma co ton tai hay khong
{
return(false); //Neu khong tra ve false
}
XmlNodeList ctghNode = doc.GetElementsByTagName("ChiTietGioHang"); //Lay danh sach cac nut sach tu tai lieu
foreach (XmlNode node in ctghNode)
{
string maGH = node.ChildNodes[0].InnerText; //Lay ra MaSach cua nut Sach hien tai
if (maGH == ctgh.MaGioHang) //Neu MaSach cua nut hien tai trung voi MaSach can sua
{
//Thuc hien sua doi thong tin cua nut nay
node.ChildNodes[0].InnerText = ctgh.MaGioHang;
node.ChildNodes[1].InnerText = ctgh.MaSach;
node.ChildNodes[2].InnerText = Convert.ToString(ctgh.SoLuongMua);
node.ChildNodes[3].InnerText = Convert.ToString(ctgh.GiaBan);
break;
}
}
doc.Save(fileName); // Sau khi sua luu lai file
return(true); //tra ve true khi sua thanh cong
}
public bool themSachVaoGioHang(Ctgh ctgh)
{
doc = new XmlDocument(); // Tao moi 1 doi tuong XmlDocument
doc.Load(fileName); // Load file xml theo duong dan
list = new List <Ctgh>(); // Tao moi 1 danh sach
loadDataFromDoc(doc, fileName, list);
// if (isExistId(list, ctgh.MaGioHang)) // Kiem tra da ton tai ma
// return false; //da ton tai tra ve false
//Khong roi vao hai truong hop day ta di thuc hien them
XmlElement ctGioHang = doc.CreateElement("ChiTietGioHang");
XmlElement maGioHang = doc.CreateElement("MaGioHang");
maGioHang.InnerText = ctgh.MaGioHang;
ctGioHang.AppendChild(maGioHang);
XmlElement maSach = doc.CreateElement("MaSach");
maSach.InnerText = ctgh.MaSach;
ctGioHang.AppendChild(maSach);
XmlElement soLuongMua = doc.CreateElement("SoLuongMua");
soLuongMua.InnerText = Convert.ToString(ctgh.SoLuongMua);
ctGioHang.AppendChild(soLuongMua);
XmlElement giaBan = doc.CreateElement("GiaBan");
giaBan.InnerText = Convert.ToString(ctgh.GiaBan);
ctGioHang.AppendChild(giaBan);
doc.DocumentElement.AppendChild(ctGioHang);
//root.AppendChild(sach); //sau khi tạo xong thì thêm vào gốc root
doc.Save(fileName); //lưu dữ liệu
return(true);
}
public void loadDataFromDoc(XmlDocument doc, string fileName, List <Ctgh> list)
{
doc = new XmlDocument(); //Tao moi mot doi tuong XmlDocumnent
doc.Load(fileName); //Load file theo duong dan
XmlNodeList ctghNode = doc.GetElementsByTagName("ChiTietGioHang");
//Lay ra cac nut co the ten la sach
foreach (XmlNode node in ctghNode) //Duyet tung nut
{
//Khai bao cac bien luu tri thong tin cua sach
string maGH, maSach;
int soLuongMua;
double giaBan;
maGH = node.ChildNodes[0].InnerText;
maSach = node.ChildNodes[1].InnerText;
soLuongMua = Convert.ToInt32(node.ChildNodes[2].InnerText);
giaBan = Convert.ToDouble(node.ChildNodes[3].InnerText);
Ctgh ctgh = new Ctgh(maGH, maSach, soLuongMua, giaBan);
list.Add(ctgh);
}
}
