public class MainViewModel : INotifyPropertyChanged
{
    public MainViewModel() { }

    private LoadCurrentViewModel _LoadCurrentVM;
    public LoadCurrentViewModel LoadCurrentVM { get { return _LoadCurrentVM; } set { _LoadCurrentVM = value; NotifyPropertyChanged("LoadCurrentVM"); } }
    private LoadingHistoryTopView _LoadHistoryTopActiveVM = new LoadingHistoryTopView();
    public LoadingHistoryTopView LoadHistoryTopActiveVM { get { return _LoadHistoryTopActiveVM; } set { _LoadHistoryTopActiveVM = value; NotifyPropertyChanged("LoadHistoryTopActiveVM"); } }
    private LoadCurrentViewModel _LoadCurrentViewModelData = new LoadCurrentViewModel();
    public LoadCurrentViewModel LoadCurrentViewModelData { get { return _LoadCurrentViewModelData; } set { _LoadCurrentViewModelData = value; NotifyPropertyChanged("LoadCurrentViewModelData"); } }

    public event PropertyChangedEventHandler PropertyChanged;
    public void NotifyPropertyChanged(string propName) { PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(propName)); }


}

//public LoadCurrentViewModel LoadCurrentViewModelData { get; set; } = new LoadCurrentViewModel();
    LoadCurrentBetween objMain = new LoadCurrentBetween();
    LoadingHistory objLoadHistory = new LoadingHistory();
    MainViewModel _MainViewModel = new MainViewModel();
    LoadHistoryUC objLoad = new LoadHistoryUC();
    public Scanner()
    {
        DataContext = _MainViewModel;
        InitializeComponent();
    }
     private void PaintScan(object sender, RoutedEventArgs e)
    {
        //Insert Scanned values to db
        DbOperations.InsertScanHistory(_MainViewModel.LoadCurrentViewModelData.Part, Convert.ToInt32(_MainViewModel.LoadCurrentViewModelData.NoofHook), 2, _MainViewModel.LoadCurrentViewModelData.Date, _MainViewModel.LoadCurrentViewModelData.Time);
        //objLoad.PopulateHistory(objLoad);
        objLoadHistory.PopulateHistory();
        MessageBox.Show("PaintScan Done");
    }

public partial class LoadingHistory : Window
{
    public List<LoadingHistoryModel> LoadhistoryVM = new List<LoadingHistoryModel>();
    public LoadingHistoryTopView LoadhistorytopVM = new LoadingHistoryTopView();
    public MainViewModel _MainViewModel = new MainViewModel();
    public LoadingHistory()
    {
        InitializeComponent();
        DataContext = _MainViewModel;
        PopulateHistory();
    }
    public void PopulateHistory()
    {
        LoadhistoryVM = DbOperations.GetLoadHistory();
        if (LoadhistoryVM.Count > 0)
        {
            for (var i = 0; i < LoadhistoryVM[0].GroupPartNumbers.Count(); i++)
            {
                switch (LoadhistoryVM[0].GroupPartNumbers[i].LinePosition)
                {
                    case 1:
                        //LoadhistoryVM[i].IsLoaded = true;
                        break;
                    case 2:
                        PainttopView paint = new PainttopView();
                        paint.Hookno = LoadhistoryVM[0].GroupPartNumbers[i].HookNumber;
                        paint.LinePosition = LoadhistoryVM[0].GroupPartNumbers[i].LinePosition;
                        paint.isEmpty = LoadhistoryVM[0].GroupPartNumbers[i].HookNumber == 0 ? true : false;
                        if (!paint.isEmpty)
                            paint.ImgSource = "/Views/Image/Bluering.png";
                        else
                            paint.ImgSource = "/Views/Image/RedStop.png";
                        _MainViewModel.LoadHistoryTopActiveVM.Paint.Add(paint);
                        break;
                    case 3:
                        BaketopView bake = new BaketopView();
                        bake.Hookno = LoadhistoryVM[0].GroupPartNumbers[i].HookNumber;
                        bake.LinePosition = LoadhistoryVM[0].GroupPartNumbers[i].LinePosition;
                        bake.isEmpty = LoadhistoryVM[0].GroupPartNumbers[i].HookNumber == 0 ? true : false;
                        if (!bake.isEmpty)
                            bake.ImgSource = "/Views/Image/Bluering.png";
                        else
                            bake.ImgSource = "/Views/Image/RedStop.png";
                        _MainViewModel.LoadHistoryTopActiveVM.Bake.Add(bake);
                        break;
                    case 4:
                        CooltopView cool = new CooltopView();
                        cool.Hookno = LoadhistoryVM[0].GroupPartNumbers[i].HookNumber;
                        cool.LinePosition = LoadhistoryVM[0].GroupPartNumbers[i].LinePosition;
                        cool.isEmpty = LoadhistoryVM[0].GroupPartNumbers[i].HookNumber == 0 ? true : false;
                        if (!cool.isEmpty)
                            cool.ImgSource = "/Views/Image/Bluering.png";
                        else
                            cool.ImgSource = "/Views/Image/RedStop.png";
                        _MainViewModel.LoadHistoryTopActiveVM.Cool.Add(cool);
                        break;
                    case 5:
                        //LoadhistoryVM[i].IsUnloaded = true;
                        break;
                }

                _MainViewModel.LoadHistoryTopActiveVM.Hooks.Add(LoadhistoryVM[0].GroupPartNumbers[i].HookNumber);
                if (i == 0)
                {
                    _MainViewModel.LoadHistoryTopActiveVM.HookNumber = LoadhistoryVM[0].GroupPartNumbers[i].HookNumber;
                    _MainViewModel.LoadHistoryTopActiveVM.LinePosition = LoadhistoryVM[0].GroupPartNumbers[i].LinePosition;
                    _MainViewModel.LoadHistoryTopActiveVM.PartNumber = LoadhistoryVM[0].GroupPartNumbers[i].PartNumber;
                    _MainViewModel.LoadHistoryTopActiveVM.Workorder = LoadhistoryVM[0].GroupPartNumbers[i].Workorder;
                    _MainViewModel.LoadHistoryTopActiveVM.Date = LoadhistoryVM[0].GroupPartNumbers[i].Date;
                }
            }
        }
        DataContext = _MainViewModel;
    }
}

<Grid Grid.Row="1" Grid.Column="0"  Grid.ColumnSpan="3">
            <Border BorderBrush="Black" BorderThickness="1"  Margin="10">
                <Grid Background="White" DataContext="{Binding LoadHistoryTopActiveVM}">..........