internal void DeleteLoaiSP(string id)
{
LoaiSP loai = db.LoaiSPs.Find(id);
db.LoaiSPs.Remove(loai);
db.SaveChanges();
}
internal string ThemLoaiSP(LoaiSP loai)
{
loai.MaLoai = TaoMa();
db.LoaiSPs.Add(loai);
db.SaveChanges();
return(loai.MaLoai);
}
internal void EditLoaiSP(LoaiSP loai)
{
LoaiSP lsp = db.LoaiSPs.Find(loai.MaLoai);
lsp.TenLoai = loai.TenLoai;
db.Entry(lsp).State = EntityState.Modified;
db.SaveChanges();
}