public static string NhapTaoID(string table, Database database)
{
int i = 0;
while (true)
{
Console.Write("nhap Id:");
string ID = Console.ReadLine();
switch (table)
{
case "NhanVien":
if (NhanVien.Find(ID, database) == null)
{
return(ID);
}
break;
case "HoaDon":
if (HoaDon.Find(ID, database) == null)
{
return(ID);
}
break;
case "ThucUong":
if (ThucUong.Find(ID, database) == null)
{
return(ID);
}
break;
case "ThuNgan":
if (ThuNgan.Find(ID, database) == null)
{
return(ID);
}
break;
case "Ban":
if (Ban.Find(ID, database) == null)
{
return(ID);
}
break;
default:
break;
}
Console.WriteLine("Id da ton tai");
if (++i == 3)
{
return(string.Empty);
}
}
}
public static string DangNhap(Database database)
{
Console.Clear();
string cv;
string ID;
string MK;
int sls = 0;
while (true)
{
Console.Write("Ban la (ql hay tn|nhap -1 de tac phan men):");
cv = Console.ReadLine();
if (cv == "-1")
{
return(cv);
}
if (cv == "ql" || cv == "tn")
{
break;
}
else
{
Console.WriteLine("Khong hop le");
}
}
if (cv == "ql")
{
while (true)
{
Console.Write("ID:");
ID = Console.ReadLine();
if (QuanLy.Find(ID, database) == null)
{
Console.WriteLine("ID khong ton tai");
if (++sls == 3)
{
return(null);
}
}
else
{
break;
}
}
while (true)
{
Console.Write("Mat Khau:");
MK = Console.ReadLine();
QuanLy quanLy = QuanLy.Find(ID, database);
if (QuanLy.Find(ID, database).MatKhau != MK)
{
Console.WriteLine("Sai Mat Khau");
if (++sls == 3)
{
return(null);
}
}
else
{
break;
}
}
return(cv);
}
while (true)
{
Console.Write("ID:");
ID = Console.ReadLine();
if (ThuNgan.Find(ID, database) == null)
{
Console.WriteLine("ID khong ton tai");
if (++sls == 3)
{
return(null);
}
}
else
{
break;
}
}
while (true)
{
Console.Write("Mat Khau:");
MK = Console.ReadLine();
if (ThuNgan.Find(ID, database).MatKhau != MK)
{
Console.WriteLine("Sai Mat Khau");
if (++sls == 3)
{
return(null);
}
}
else
{
break;
}
}
return(cv);
}
public static void Update(string oldID, ThuNgan newThuNgan, Database database)
{
ThuNgan thuNgan = ThuNgan.Find(oldID, database);
thuNgan.Copy(newThuNgan);
}
public static string NhapXoaID(string table, Database database)
{
int i = 0;
string ID;
while (true)
{
switch (table)
{
case "NhanVien":
Console.Write("nhap Id nhan vien:");
ID = Console.ReadLine();
if (NhanVien.Find(ID, database) != null)
{
return(ID);
}
break;
case "HoaDon":
Console.Write("nhap Id hoa don:");
ID = Console.ReadLine();
if (HoaDon.Find(ID, database) != null)
{
return(ID);
}
break;
case "ThucUong":
Console.Write("nhap Id thuc uong (nhap 'stop' de dung lai):");
ID = Console.ReadLine();
if (ThucUong.Find(ID, database) != null)
{
return(ID);
}
if (ID == "stop")
{
return("stop");
}
break;
case "ThuNgan":
Console.Write("nhap Id thu ngan:");
ID = Console.ReadLine();
if (ThuNgan.Find(ID, database) != null)
{
return(ID);
}
break;
case "Ban":
Console.Write("nhap Id ban:");
ID = Console.ReadLine();
if (Ban.Find(ID, database) != null)
{
return(ID);
}
break;
default:
break;
}
Console.WriteLine("Id khong ton tai");
if (++i == 3)
{
return(string.Empty);
}
}
}
public static void Delete(string iD, Database database)
{
database.ThuNgans.Remove(ThuNgan.Find(iD, database));
}
