WPF 的打印对话框和打印预览对话框

Question

是否有 WPF 的打印对话框与 WPF 中的打印预览对话框相结合，例如 Google Chrome 或 Word？

此时我使用 Windows 表单中的打印预览对话框。我也尝试使用它的 WPF 版本。但是WPF没有PrintPreviewDialog或者PrintPrewiewControl。这是我的代码：

//To the top of my class file:
using Forms = System.Windows.Forms;

//in a methode on the same class:
PageSettings setting = new PageSettings();
setting.Landscape = true;

_document = new PrintDocument();
_document.PrintPage += _document_PrintPage;
_document.DefaultPageSettings = setting ;

Forms.PrintPreviewDialog printDlg = new Forms.PrintPreviewDialog();
printDlg.Document = _document;
printDlg.Height = 500;
printDlg.Width = 200;

try
{
    if (printDlg.ShowDialog() == Forms.DialogResult.OK)
    {
        _document.Print();
    }
}
catch (InvalidPrinterException)
{
    MessageBox.Show("No printers found.", "Error", MessageBoxButton.OK, MessageBoxImage.Error);
}

我也搜索了 NuGet 包，但没有找到真正好的。

Answer 1

您的要求可以通过多种方式实现，例如，您可以使用 PrintDialog class。以下 MSDN 页面包含说明以及一些示例代码：

WinForms：System.Windows.Forms.PrintDialog
WPF: System.Windows.Controls.PrintDialog (thanks to Bartosz)

也可以通过 C# 实现，例如，考虑下一个代码：

 private string _previewWindowXaml =
    @"<Window
        xmlns ='http://schemas.microsoft.com/netfx/2007/xaml/presentation'
        xmlns:x ='http://schemas.microsoft.com/winfx/2006/xaml'
        Title ='Print Preview - @@TITLE'
        Height ='200' Width ='300'
        WindowStartupLocation ='CenterOwner'>
                      <DocumentViewer Name='dv1'/>
     </Window>";

internal void DoPreview(string title)
{
    string fileName = System.IO.Path.GetRandomFileName();
    FlowDocumentScrollViewer visual = (FlowDocumentScrollViewer)(_parent.FindName("fdsv1"));

    try
    {
        // write the XPS document
        using (XpsDocument doc = new XpsDocument(fileName, FileAccess.ReadWrite))
        {
            XpsDocumentWriter writer = XpsDocument.CreateXpsDocumentWriter(doc);
            writer.Write(visual);
        }

        // Read the XPS document into a dynamically generated
        // preview Window 
        using (XpsDocument doc = new XpsDocument(fileName, FileAccess.Read))
        {
            FixedDocumentSequence fds = doc.GetFixedDocumentSequence();

            string s = _previewWindowXaml;
            s = s.Replace("@@TITLE", title.Replace("'", "&apos;"));

            using (var reader = new System.Xml.XmlTextReader(new StringReader(s)))
            {
                Window preview = System.Windows.Markup.XamlReader.Load(reader) as Window;

                DocumentViewer dv1 = LogicalTreeHelper.FindLogicalNode(preview, "dv1") as DocumentViewer;
                dv1.Document = fds as IDocumentPaginatorSource;


                preview.ShowDialog();
            }
        }
    }
    finally
    {
        if (File.Exists(fileName))
        {
            try
            {
                File.Delete(fileName);
            }
            catch
            {
            }
        }
    }
}

它的作用：它实际上将视觉内容打印到 XPS 文档中。然后它加载“打印的”XPS 文档并将其显示在一个非常简单的 XAML 文件中，该文件存储为字符串，而不是单独的模块，并在运行时动态加载。生成的 Window 具有 DocumentViewer 按钮：打印、调整到最大页面宽度等。

我还添加了一些代码来隐藏搜索框。请参阅 this answer to WPF: How can I remove the searchbox in a DocumentViewer? 了解我是如何做到的。

效果是这样的：

XpsDocument 可以在 ReachFramework dll 中找到，XpsDocumentWriter 可以在 System.Printing dll 中找到，两者都必须添加为对项目的引用

Answer 2

您想要做的，是从您要打印的内容（flowDocument）中创建一个 xpsDocument 并使用该 XpsDocument 来预览内容，因为例如，假设您有以下 Xaml，您想要打印其内容的 flowDocument：

 <Grid>
    <Grid.RowDefinitions>
        <RowDefinition Height="*"/>
        <RowDefinition Height="Auto"/>
    </Grid.RowDefinitions>
    <FlowDocumentScrollViewer>
        <FlowDocument x:Name="FD">
            <Paragraph>
                <Image Source="http://www.wpf-tutorial.com/images/logo.png" Width="90" Height="90" Margin="0,0,30,0" />
                <Run FontSize="120">WPF</Run>
            </Paragraph>

            <Paragraph>
                WPF, which stands for
                <Bold>Windows Presentation Foundation</Bold> ,
                is Microsoft's latest approach to a GUI framework, used with the .NET framework.
                Some advantages include:
            </Paragraph>

            <List>
                <ListItem>
                    <Paragraph>
                        It's newer and thereby more in tune with current standards
                    </Paragraph>
                </ListItem>
                <ListItem>
                    <Paragraph>
                        Microsoft is using it for a lot of new applications, e.g. Visual Studio
                    </Paragraph>
                </ListItem>
                <ListItem>
                    <Paragraph>
                        It's more flexible, so you can do more things without having to write or buy new controls
                    </Paragraph>
                </ListItem>
            </List>

        </FlowDocument>
    </FlowDocumentScrollViewer>        
    <Button Content="Print" Grid.Row="1" Click="Button_Click"></Button>
</Grid>

flowDocument 示例来自 Wpf tutorials site

打印按钮的 Click 事件处理程序应如下所示：

 private void Button_Click(object sender, RoutedEventArgs e)
    {
if (File.Exists("printPreview.xps"))
            {
                File.Delete("printPreview.xps");
            }
        var xpsDocument = new XpsDocument("printPreview.xps", FileAccess.ReadWrite);
        XpsDocumentWriter writer = XpsDocument.CreateXpsDocumentWriter(xpsDocument);
        writer.Write(((IDocumentPaginatorSource)FD).DocumentPaginator);            
        Document = xpsDocument.GetFixedDocumentSequence();
        xpsDocument.Close();
        var windows = new PrintWindow(Document);
        windows.ShowDialog();
    }

public FixedDocumentSequence Document { get; set; }

所以你主要是:

正在创建 Xps 文档并将其存储在 printPreview.xps 文件中，
正在将 FlowDocument 内容写入该文件，
将 XpsDocument 传递给 PrintWindow 处理预览和打印操作，

此处 PrintWindow 的样子：

<Grid>
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="*"/>
        <ColumnDefinition Width="1.5*"/>
    </Grid.ColumnDefinitions>
    <StackPanel>
        <Button Content="Print" Click="Button_Click"></Button>
        <!--Other print operations-->
    </StackPanel>
    <DocumentViewer  Grid.Column="1" x:Name="PreviewD">            
    </DocumentViewer>
</Grid>

和后面的代码：

public partial class PrintWindow : Window
{
    private FixedDocumentSequence _document;
    public PrintWindow(FixedDocumentSequence document)
    {
        _document = document;
        InitializeComponent();
        PreviewD.Document =document;
    }

    private void Button_Click(object sender, RoutedEventArgs e)
    {
        //print directly from the Xps file 
    }
}

最终结果看起来像这样

Ps：要使用 XpsDocument，您应该添加对 System.Windows.Xps.Packaging namespace

的引用

Answer 3

这是打印预览的示例解决方案： MainWindow.xaml

<FlowDocumentScrollViewer>
        <FlowDocument x:Name="FD">
            <Paragraph>                    
                <Run FontSize="120">WPF</Run>
            </Paragraph>
            <Paragraph>
                WPF, which stands for
                <Bold>Windows Presentation Foundation</Bold> ,
            is Microsoft's latest approach to a GUI framework, used with the .NET framework.
            Some advantages include:
            </Paragraph>
            
            <List>
                <ListItem>
                    <Paragraph>
                        It's newer and thereby more in tune with current standards
                    </Paragraph>
                </ListItem>
                <ListItem>
                    <Paragraph>
                        Microsoft is using it for a lot of new applications, e.g. Visual Studio
                    </Paragraph>
                </ListItem>
                <ListItem>
                    <Paragraph>
                        It's more flexible, so you can do more things without having to write or buy new controls
                    </Paragraph>
                </ListItem>
            </List>
        </FlowDocument>
</FlowDocumentScrollViewer>
<Button Content="Print" Click="Button_Click"></Button>

MainWindow.xaml.cs

 private void Button_Click(object sender, RoutedEventArgs e)
        {
            //Fix the size of the document
            PrintDialog pd = new PrintDialog();
            FD.PageHeight = pd.PrintableAreaHeight;
            FD.PageWidth = pd.PrintableAreaWidth;
            FD.PagePadding = new Thickness(30);
            FD.ColumnGap = 0;
            FD.ColumnWidth = pd.PrintableAreaWidth;

            ////to print the document directly without print preview
            //IDocumentPaginatorSource dps = FD;
            //pd.PrintDocument(dps.DocumentPaginator, "flow doc");

            //Print preview the document before printing
            if (File.Exists("printPreview.xps")) File.Delete("printPreview.xps");
            var xpsDocument = new XpsDocument("printPreview.xps", FileAccess.ReadWrite);
            XpsDocumentWriter writer = XpsDocument.CreateXpsDocumentWriter(xpsDocument);
            writer.Write(((IDocumentPaginatorSource)FD).DocumentPaginator);
            Document = xpsDocument.GetFixedDocumentSequence();
            xpsDocument.Close();
            var windows = new PrintPreview(Document);
            windows.ShowDialog();
        }

PrintPreview.xaml

<Window ........>        
    <DocumentViewer x:Name="PreviewD" />    
</Window>

PrintPreview.xaml.cs

public partial class PrintPreview : Window
{
    private FixedDocumentSequence _document;
    public PrintPreview(FixedDocumentSequence document)
    {
        _document = document;
        InitializeComponent();
        PreviewD.Document = document;
    }
}

WPF 的打印对话框和打印预览对话框

Print dialog and print prewiew dialog for WPF

c#

printing

wpf

xaml

print-preview