How to bind the listview data from other class in WPF csharp?

public class NodeDetails
{
    public string Name { get; set; }
    public string Size { get; set; }
    public ushort DateModified { get; set; }
    public string FType { get; set; }
    public string Path { get; set; }
    public ImageSource ListIcon { get; set; }
}

public class ViewModel : ViewModelBase
{
    private NodeDetails _student;
    private ObservableCollection<nodedetails> _students;
    private ICommand _SubmitCommand;
    public NodeDetails Student
    {
        get
        {
            
            return _student;
        }
        set
        {
            _student = value;
            NotifyPropertyChanged("Student");
        }
    }
    public ObservableCollection<nodedetails> Students
    {
        get
        {
        //  _students= new ObservableCollection<nodedetails>(Global.GnodeDetails);
            return _students;
        }
        set
        {
            _students = value;
            NotifyPropertyChanged("Students");
        }
    }

    public ICommand SubmitCommand
    {
        get
        {
            if (_SubmitCommand == null)
            {
                _SubmitCommand = new RelayCommand(param => this.Submit(),
                    null);
            }
            return _SubmitCommand;
        }
    }
    public ViewModel()
    {
        Student = new NodeDetails();
        Students = new ObservableCollection<nodedetails>();
    
        //Students = new ObservableCollection<nodedetails>(Global.GnodeDetails);
        Students.CollectionChanged += new System.Collections.Specialized.NotifyCollectionChangedEventHandler(Students_CollectionChanged);
        
    }

public  void Students_CollectionChanged(object sender, System.Collections.Specialized.NotifyCollectionChangedEventArgs e)
    {
        NotifyPropertyChanged("Students");
    }

    public void Submit()
    {
        Students = new ObservableCollection<nodedetails>(Global.GnodeDetails);

        

        //Students.Add(Student);
        //Student = new NodeDetails();
    }
}


public class ViewModelBase : INotifyPropertyChanged
{


    public event PropertyChangedEventHandler PropertyChanged;
//public event EventHandler SomeEventHappened;

    protected void NotifyPropertyChanged(string propertyName)

    {

        

        if (PropertyChanged != null)
        {
            PropertyChanged(this, new PropertyChangedEventArgs(propertyName));
        }
    }
}

public class RelayCommand : ICommand
{
    public RelayCommand(Action<object> execute) : this(execute, null)
    {
    }
    public RelayCommand(Action<object> execute, Predicate<object> canExecute)
    {
        if (execute == null)
            throw new ArgumentNullException("execute");
        _execute = execute;
        _canExecute = canExecute;
    }
    public bool CanExecute(object parameter)
    {
        return _canExecute == null ? true : _canExecute(parameter);
    }
    public event EventHandler CanExecuteChanged
    {
        add { CommandManager.RequerySuggested += value; }
        remove { CommandManager.RequerySuggested -= value; }
    }
    public void Execute(object parameter)
    {
        _execute(parameter);
    }
    private readonly Action<object> _execute;
    private readonly Predicate<object> _canExecute;
}

<local:treeviewcontrol grid.column="0" background="#F9F9F9" horizontalalignment="Left" verticalalignment="Top" height="540" width="230" margin="0,0,0,0">
    <listview grid.column="1" itemssource="{Binding Students}">
        <listview.view>
            <gridview>
                <gridviewcolumn header="Name" celltemplate="{StaticResource myCellTemplateMonth}" width="200">
                    
                
                <gridviewcolumn header="Size" width="60" displaymemberbinding="{Binding Size}">
                <gridviewcolumn header="DateModified" width="150" displaymemberbinding="{Binding DateModified}">
                <gridviewcolumn header="Type" width="70" displaymemberbinding="{Binding FType}">
                <gridviewcolumn header="Path" width="150" displaymemberbinding="{Binding Path}">
            

<pre>
<pre> <Button Height="40" Width="105" Margin="0,0,20,0" Grid.Column="1"  Command="{Binding SubmitCommand}" HorizontalAlignment="Right" Background="#8E8E8E">

    <StackPanel>
        <TextBlock Text="Recover" FontSize="18" Foreground="#F9F9F9"/>
    </StackPanel>
</Button>

class tree
{
    public void accesss()
    {
        Viewmodel tem=new Viewmodel();
        tem.submit();
    }
}