[WPF] Imprimer sur plusieurs pages une ListBox

Bonjour,

je souhaiterais savoir comment imprimer sur plusieurs pages une ListBox ??

voilà le code que j'ai fait mais il n'imprime que sur une seule page donc si la ListBox contient trop d'éléments ca ne va pas.

Code:

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            if (print == true)
            {
                double height = 0;
                StackPanel _stck = new StackPanel();
                _stck.HorizontalAlignment = HorizontalAlignment.Center;
                Rectangle a = new Rectangle();
                a.Width = 530;
                a.Height = 300;
                a.Measure(new Size(Double.PositiveInfinity, Double.PositiveInfinity));
                a.Fill = new VisualBrush(this.stckHeader as Visual);
                //a.Stretch = Stretch.UniformToFill;
                Size sizeGrid = a.DesiredSize;
                Point ptGrid = new Point(0, height);
                a.Arrange(new Rect(ptGrid, sizeGrid));
                _stck.Children.Add(a);
                height += a.Height;
 
                PageContent _pc = new PageContent();
                for (int i = 0; i < Liste.Items.Count; i++)
                {
                    // OffreProductItem -> UserControl
                    OffreProductItem _opi = (Liste.Items[i] as OffreProductItem);
 
                    a = new Rectangle();
                    a.Width = 500;
                    a.Height = 175;
                    a.Measure(new Size(Double.PositiveInfinity, Double.PositiveInfinity));
                    a.Fill = new VisualBrush(_opi as Visual);
                    sizeGrid = a.DesiredSize;
                    Point ptgrid2 = new Point(0, height);
                    a.Arrange(new Rect(ptgrid2, sizeGrid));
                    _stck.Children.Add(a);
                    height += a.Height;
                }
 
                pDialog.PrintVisual(_stck as Visual, "impression");
            }

merci d'avance pour votre aide ;)

this.m_tbm = inMTBM; switch (this.m_view) { default: case PrintingView.Vertical: this.m_width = 96 * 8.5; this.m_height = 96 * 11; break; case PrintingView.Horizontal: this.m_width = 96 * 11; this.m_height = 96 * 8.5; break; } FixedDocument fixedDocument = new FixedDocument(); fixedDocument.DocumentPaginator.PageSize = new Size(this.m_width, this.m_height); PageContent _pg = new PageContent(); FixedPage fixedPage = new FixedPage(); fixedPage.Background = Brushes.White; UIElement visual = null; visual = this.CreateVisual(); FixedPage.SetLeft(visual, 0); FixedPage.SetTop(visual, 0); double pageWidth = this.m_width; double pageHeight = this.m_height; fixedPage.Width = pageWidth; fixedPage.Height = pageHeight; fixedPage.Children.Add((UIElement)visual); Size sz = new Size(this.m_width, this.m_height); fixedPage.Measure(sz); fixedPage.Arrange(new Rect(new Point(), sz)); fixedPage.UpdateLayout(); ((IAddChild)_pg).AddChild(fixedPage); fixedDocument.Pages.Add(_pg); return fixedDocument;