我是WPF新手，想要打印控件中显示的ListBox控件自定义项。
ListBox项结构如下：
<StackPanel Orientation="Vertical" HorizontalAlignment="Center" x:Name="PanelContainer">
<Border CornerRadius="5" BorderThickness="2" BorderBrush="DarkBlue" x:Name="PanelMessage">
<StackPanel Orientation="Horizontal" Background="{Binding Color}">
<StackPanel Orientation="Vertical">
<Image Source="{Binding SenderImage}" Width="50" Height="50" Stretch="Uniform" />
<TextBlock Text="{Binding Sender}" TextAlignment="Center" Width="50" TextWrapping="Wrap" />
</StackPanel>
<StackPanel Orientation="Horizontal" VerticalAlignment="Center">
<Image Source="{Binding IsRead}" Width="15" Height="15" Stretch="Uniform"
VerticalAlignment="Top" />
<StackPanel Orientation="Vertical" Margin="5">
<TextBlock x:Name="txtbTime" Text="{Binding TimeCreated}" />
<TextBlock x:Name="txtbMessage" Text="{Binding MessageBody}"
TextWrapping="WrapWithOverflow" HorizontalAlignment="Stretch" />
</StackPanel>
</StackPanel>
</StackPanel>
</Border>
</StackPanel>
我的打印代码如下：
UIElement myListBoxItem =
(UIElement) (lbMessages.ItemContainerGenerator.ContainerFromItem((Message) lbMessages.Items[i]));
if (myListBoxItem != null)
{
string element = XamlWriter.Save(myListBoxItem);
MemoryStream ms = new MemoryStream();
XamlWriter.Save(element, ms);
ms.Seek(0, SeekOrigin.Begin);
object obj1 = XamlReader.Load(ms);
BlockUIContainer bc = new BlockUIContainer();
bc.Child = obj1 as UIElement;
fd.Blocks.Add(bc);
ms.Close();
}
PrintDialog dialog = new PrintDialog();
if (dialog.ShowDialog() == true)
dialog.PrintDocument(idpSource.DocumentPaginator, "Hello WPF Printing.");
我的结果是一个清晰的页面。
我希望有些人可以帮助我，谢谢。
答案 0 :(得分：0)
我对DataGrid和ListView有同样的问题，我用这个扩展解决了它。 我认为您可以为ListBox调整此代码，我希望这可以帮助您。
问候。
using System;
using System.IO;
using System.Reflection;
using System.Text;
using System.IO.Packaging;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Markup;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Xps;
using System.Windows.Xps.Packaging;
var view = objToPrint as ListView;
if (view != null)
PrintExtensions.PrintPreview(view);
else
{
var grid = objToPrint as DataGrid;
if (grid != null)
PrintExtensions.PrintPreview(grid);
}
public static class PrintExtensions
{
private static FixedDocument ToFixedDocument(UIElement element, PrintDialog dialog)
{
var capabilities = dialog.PrintQueue.GetPrintCapabilities(dialog.PrintTicket);
var pageSize = new Size(dialog.PrintableAreaWidth, dialog.PrintableAreaHeight);
var extentSize = new Size(capabilities.PageImageableArea.ExtentWidth,capabilities.PageImageableArea.ExtentHeight);
var fixedDocument = new FixedDocument();
element.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
element.Arrange(new Rect(new Point(0, 0), element.DesiredSize));
double totalHeight = element.DesiredSize.Height;
double yOffset = 0d;
while (yOffset < totalHeight)
{
var brush = new VisualBrush(element)
{
Stretch = Stretch.None,
AlignmentX = AlignmentX.Left,
AlignmentY = AlignmentY.Top,
ViewboxUnits = BrushMappingMode.Absolute,
TileMode = TileMode.None,
Viewbox = new Rect(0, yOffset, extentSize.Width, extentSize.Height)
};
var pageContent = new PageContent();
var page = new FixedPage();
((IAddChild)pageContent).AddChild(page);
fixedDocument.Pages.Add(pageContent);
page.Width = pageSize.Width;
page.Height = pageSize.Height;
var canvas = new Canvas();
FixedPage.SetLeft(canvas, capabilities.PageImageableArea.OriginWidth);
FixedPage.SetTop(canvas, capabilities.PageImageableArea.OriginHeight);
canvas.Width = extentSize.Width;
canvas.Height = extentSize.Height;
canvas.Background = brush;
page.Children.Add(canvas);
yOffset += extentSize.Height;
}
return fixedDocument;
}
private static ListView ToPrintFriendlyGrid(ListView source)
{
var listView = new ListView {ItemsSource = source.ItemsSource};
listView.SetValue(ListViewPagingBehavior.EnablePagingProperty, false);
listView.Items.Filter = null;
ScrollViewer.SetVerticalScrollBarVisibility(listView, ScrollBarVisibility.Hidden);
ScrollViewer.SetHorizontalScrollBarVisibility(listView, ScrollBarVisibility.Hidden);
var gridView = (GridView)source.View;
var newGridView = new GridView();
double width = 0;
foreach (var viewColumn in gridView.Columns)
{
var column = viewColumn;
if (column != null)
{
var columnType = column.GetType();
var newColumn = (GridViewColumn) Activator.CreateInstance(columnType);
var objPropertiesArray = columnType.GetProperties();
foreach (PropertyInfo info in objPropertiesArray)
{
var pin = columnType.GetProperty(info.Name);
if (pin != null)
{
if (pin.CanWrite)
{
object obj = info.GetValue(column, null);
pin.SetValue(newColumn, obj, null);
}
}
}
width += column.Width;
newGridView.Columns.Add(newColumn);
}
}
listView.Width = width;
var dialog = new PrintDialog();
double d = Math.Round(dialog.PrintableAreaHeight / 21, 2); // elementi contenuti in una pagina
double e = Math.Round(listView.Items.Count / d, 2); // numero di pagine ... anche se attualmente c'è qualche problema di impaginazione
if (Math.Truncate(e) == 0)
e = .95;
listView.Height = dialog.PrintableAreaHeight * e;
listView.View = newGridView;
return listView;
}
private static DataGrid ToPrintFriendlyGrid(DataGrid source)
{
var newGridView = new DataGrid {ItemsSource = source.ItemsSource};
ScrollViewer.SetVerticalScrollBarVisibility(newGridView, ScrollBarVisibility.Hidden);
ScrollViewer.SetHorizontalScrollBarVisibility(newGridView, ScrollBarVisibility.Hidden);
double width = 0;
foreach (DataGridColumn gridColumn in source.Columns)
{
var column = gridColumn;
if (column != null)
{
Type columnType = column.GetType();
var newColumn = (DataGridColumn) Activator.CreateInstance(columnType);
PropertyInfo[] objPropertiesArray = columnType.GetProperties();
foreach (PropertyInfo info in objPropertiesArray)
{
PropertyInfo pin = columnType.GetProperty(info.Name);
if (pin != null)
{
if (pin.CanWrite)
{
object obj = info.GetValue(column, null);
pin.SetValue(newColumn, obj, null);
}
}
}
width += column.ActualWidth;
newGridView.Columns.Add(newColumn);
}
}
newGridView.Width = width;
var dialog = new PrintDialog();
double d = Math.Round(dialog.PrintableAreaHeight / 21, 2); // elementi contenuti in una pagina
double e = Math.Round(newGridView.Items.Count / d, 2); // numero di pagine ... anche se attualmente c'è qualche problema di impaginazione
if (Math.Truncate(e) == 0)
e = .95;
newGridView.Height = dialog.PrintableAreaHeight * e;
return newGridView;
}
public static void PrintPreview(ListView source)
{
var window = new Window {Title = "Print Preview"};
var documentViewer = new DocumentViewer
{
Document =
ToFixedDocument(ToPrintFriendlyGrid(source), new PrintDialog())
};
window.Content = documentViewer;
window.ShowDialog();
}
public static void Print(ListView source, bool showDialog)
{
var dialog = new PrintDialog();
bool? dialogResult = showDialog ? dialog.ShowDialog() : true;
if (dialogResult == true)
{
var viewer = new DocumentViewer
{
Document = ToFixedDocument(ToPrintFriendlyGrid(source), dialog)
};
dialog.PrintDocument(viewer.Document.DocumentPaginator, null);
}
}
public static void PrintPreview(DataGrid source)
{
var window = new Window { Title = "Print Preview" };
var documentViewer = new DocumentViewer
{
Document =
ToFixedDocument(ToPrintFriendlyGrid(source), new PrintDialog())
};
window.Content = documentViewer;
window.ShowDialog();
}
public static void Print(DataGrid source, bool showDialog)
{
var dialog = new PrintDialog();
bool? dialogResult = showDialog ? dialog.ShowDialog() : true;
if (dialogResult == true)
{
var viewer = new DocumentViewer
{
Document = ToFixedDocument(ToPrintFriendlyGrid(source), dialog)
};
dialog.PrintDocument(viewer.Document.DocumentPaginator, null);
}
}
}
答案 1 :(得分：0)
经过一些搜索，我发现了一个解决方案，如下所示： 1.迭代我的ListBox项目。 2.使用值生成表。 3.打印保存值的表格。
代码：
foreach (Message message in lbMessages.Items)
{
TableRowGroup _MessageContainer = new TableRowGroup();
// Rows
TableRow _TimeCreated = new TableRow();
TableRow _imageRow = new TableRow();
TableRow _TimeRow = new TableRow();
// first row
TableCell xcell = new TableCell(new Paragraph(new Run("Image is here")));
xcell.RowSpan = 2;
TableCell _TimeCell = new TableCell(new Paragraph(new Run(message.TimeCreated.ToString())));
_TimeCreated.Cells.Add(xcell);
_TimeCreated.Cells.Add(_TimeCell);
// Second Row.
xcell = new TableCell(new Paragraph(new Run(message.MessageBody)));
_imageRow.Cells.Add(xcell);
// Third Row
xcell = new TableCell(new Paragraph(new Run(message.Sender)));
xcell.ColumnSpan = 2;
_MessageContainer.Rows.Add(_TimeCreated);
_MessageContainer.Rows.Add(_imageRow);
_MessageContainer.Rows.Add(_TimeRow);
Table xtable = new Table();
xtable.RowGroups.Add(_MessageContainer);
xtable.CellSpacing = 3;
xtable.Background = Brushes.White;
document.Blocks.Add(xtable);
}
打印代码：
PrintDialog dialog = new PrintDialog();
if (dialog.ShowDialog() == true)
{
IDocumentPaginatorSource idpSource = document;
dialog.PrintDocument(idpSource.DocumentPaginator, "All Messages");
}