public PhieuDangKyHoatDong(int iMaHoatDong)
{
using (QuanLyDoanVienEntities db = new QuanLyDoanVienEntities())
{
HoatDong hd = db.HoatDongs.Single(n => n.MaHoatDong == iMaHoatDong);
this.MaHoatDong = iMaHoatDong;
this.TenHoatDong = hd.TenHoatDong;
this.NgayBatDau = hd.ThoiGianBauDau.Value;
this.NgayKetThuc = hd.ThoiGianKetThuc.Value;
this.DiaDiem = hd.DiaDiem;
this.NgayDangKy = DateTime.Now;
}
}