在打印FlowDocument中避免多列

Question

我正在编写要从FlowDocument打印的代码。

        PrintDialog printDialog = new PrintDialog();
        bool? result = printDialog.ShowDialog();
        if (result == true)
        {
            FlowDocument fd = new FlowDocument();
            fd.Blocks.Add(new Paragraph(new Run(String.Format("Message:\r\n{0}\r\n", txtMessage.Text))));
            fd.PageHeight = printDialog.PrintableAreaHeight;
            fd.PageWidth = printDialog.PrintableAreaWidth;
            printDialog.PrintDocument((fd as IDocumentPaginatorSource).DocumentPaginator, "print test");
        }

此代码将在一页中打印多列。如何避免这种情况？

Answer 1

我想通了。我需要设置FlowDocument的ColumnWidth。

fd.PagePadding = new Thickness(50);
fd.ColumnGap = 0;
fd.ColumnWidth = printDialog.PrintableAreaWidth; 

Answer 2

如果不涉及printDialog（例如，编写XML文件），则此解决方案对我有效：

        .PagePadding = New Thickness(50)
        .ColumnGap = 0
        .PageWidth = 21 * 96 / 2.54
        .PageHeight = 29.7 * 96 / 2.54

        .ColumnWidth = .PageWidth - .PagePadding.Left - .PagePadding.Right