WPF预览并打印FlowDocument

在前面的文章中，介绍过通过FixedDocument进行预览并打印。

https://www.cnblogs.com/zhaotianff/p/18254574

 

但是有时候我们可能使用的是FlowDocument，例如在RichTextBox中时。

如何对FlowDocument进行预览并打印呢。

 

可以将FlowDocument转换成XpsDocument，然后再使用DocumentViewer进行预览并打印。

 

注意：需要引用 ReachFramework程序集

 

 

例如我们有如下 的FlowDocument

<FlowDocument xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:local="clr-namespace:FlowDocumentPreviewAndPrint"
              ColumnWidth="400" FontSize="14" FontFamily="Georgia">
    <Paragraph>
        <Image Source="jk.png"></Image>
    </Paragraph>
    <Paragraph>
        <Run>Hello World</Run>
    </Paragraph>
</FlowDocument>

 

然后在主窗口中增加一个DocumentViewer

<wd:Window x:Class="FlowDocumentPreviewAndPrint.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
        xmlns:local="clr-namespace:FlowDocumentPreviewAndPrint"
        xmlns:wd="https://github.com/WPFDevelopersOrg/WPFDevelopers"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <Grid.RowDefinitions>
            <RowDefinition/>
            <RowDefinition Height="40"/>
        </Grid.RowDefinitions>

        <DocumentViewer Name="docv">

        </DocumentViewer>

        <Grid Grid.Row="1">
            <Button Content="加载" HorizontalAlignment="Center" VerticalAlignment="Center" Width="88" Height="28" Click="Button_Click"></Button>
        </Grid>
    </Grid>
</wd:Window>

 

当点击打印时，我们将FlowDocument转换成XpsDocument，并设置到DocumentViewer的Document中去。

private void Button_Click(object sender, RoutedEventArgs e)
{
    try
    {
        FlowDocument flowDocument = (FlowDocument)Application.LoadComponent(new Uri("FlowDocument1.xaml", UriKind.RelativeOrAbsolute));

        string temp = System.IO.Path.GetTempFileName();

        if (File.Exists(temp) == true)
            File.Delete(temp);

        XpsDocument xpsDoc = new XpsDocument(temp, FileAccess.ReadWrite);

        XpsDocumentWriter xpsWriter = XpsDocument.CreateXpsDocumentWriter(xpsDoc);

        xpsWriter.Write((flowDocument as IDocumentPaginatorSource).DocumentPaginator);

        docv.Document = xpsDoc.GetFixedDocumentSequence();

        xpsDoc.Close();
    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}

 

示例代码

下载

 

参考资料

https://bryanwilhite.github.io/the-funky-knowledge-base/entry/kb2076072263/