static AddNhanVienWindow()
 {
     if (signleton == null)
     {
         signleton = new AddNhanVienWindow();
     }
 }
        private AddNhanVienWindow()
        {
            InitializeComponent();
            List <ComboData> ListData = new List <ComboData>();

            ListData.Add(new ComboData {
                Name = "Nam", Value = true
            });
            ListData.Add(new ComboData {
                Name = "Nu", Value = false
            });

            cbxPhai.ItemsSource       = ListData;
            cbxPhai.SelectedValuePath = "Value";
            cbxPhai.DisplayMemberPath = "Name";

            cbxPhai.SelectedIndex = 0;

            Id = 0;

            EventHandler eventHandler = (o, i) => { signleton = new AddNhanVienWindow(); };

            this.Closed += eventHandler;

            this.DataContext = new ViewModel();
        }
 private void btnEdit_Click(object sender, RoutedEventArgs e)
 {
     if (dgContent.CurrentItem != null)
     {
         tableLog.SetRowChange(((DataRowView)dgContent.CurrentItem).Row);
         AddNhanVienWindow addNhanVienWindow = new AddNhanVienWindow(((DataRowView)dgContent.CurrentItem).Row);
         addNhanVienWindow.dataGrid = this.dgContent;
         addNhanVienWindow.Show();
     }
     else
     {
         MessageBox.Show("Không có hàng nào được chọn!");
     }
 }