WPF multipage printing for FixedDocument (Visual C# 2010) - wpf

Question

I have a question about multipage FixedPage. I have a Grid created programmatically and the Grid exceeds one A4 page. Now I want to print the Grid in several FixedPage with print margin. But on my way, I create the Grid repeatedly and offset the LeftTop point in the fixedPage Arrange function. I meet a problem that I cannot set print margin in fixedPage, because I set the print margin to the fixedPage and then the first page will have print margin and the next pages will be blank.
How do print multipage of FixedDocument for a large grid want to print？
PrintDialog pd = new System.Windows.Controls.PrintDialog();
if (pd.ShowDialog() == false)
{
return;
}
var pageSize = new Size(pd.PrintableAreaWidth, pd.PrintableAreaHeight);
var document = new FixedDocument();
document.DocumentPaginator.PageSize = pageSize;
for (int nPage = 0; nPage < MaxPage; nPage++)
{
Grid tempGrid = LoadControlMotherInit();
tempGrid.Width = GridWidth;
tempGrid.Height = GridActualHeight;
Point leftTop = new Point();
leftTop.X = 10;
leftTop.Y = -nPage * pageSize.Height;
// Create FixedPage
var fixedPage = new FixedPage();
fixedPage.Width = pageSize.Width;
fixedPage.Height = pageSize.Height;
fixedPage.Margin = new Thickness(0, 0, 0, 96);
fixedPage.Children.Add((UIElement)tempGrid);
fixedPage.Measure(pageSize);
fixedPage.Arrange(new Rect(leftTop, pageSize));
fixedPage.UpdateLayout();
// Add page to document
var pageContent = new PageContent();
((System.Windows.Markup.IAddChild)pageContent).AddChild(fixedPage);
document.Pages.Add(pageContent);
}
pd.PrintDocument(document.DocumentPaginator, "My Document");

Answer 1

From looking at your example,
PrintDialog.PrintDocument method takes in a DocumentPaginator, which could come from a multitude of source.
that being said, you can inherit from DocumentPaginator and take control of everything from PageSize, PageCount to the actual DocumentPage being returned.
Imagine your DocumentPage as a sliding window over your UIElement; but instead of sliding your DocumentPage, you slide your UIElement using its RenderTransform.