private void cmdSuaKhachHang_Click(object sender, RoutedEventArgs e)
 {
     HyperlinkButton cmdSuaKhachHang = sender as HyperlinkButton;
     int KhachHangID = int.Parse(cmdSuaKhachHang.CommandParameter.ToString());
     frmKhachHangEdit KhachHangEdit = new frmKhachHangEdit();
     KhachHangEdit.Closed += new EventHandler(KhachHangEdit_Closed);
     KhachHangEdit.KhachHang_Load(KhachHangID);
     KhachHangEdit.Show();
 }
 private void cmdThemKhachHang_Click(object sender, RoutedEventArgs e)
 {
     frmKhachHangEdit KhachHangEdit = new frmKhachHangEdit();
     KhachHangEdit.Closed += new EventHandler(KhachHangEdit_Closed);
     KhachHangEdit.KhachHang_Load(0);
     KhachHangEdit.Show();
 }