我需要通过UWP应用程序打印列表。由于List可以有N个项目，因此我需要根据此内容在打印预览中显示页面，然后全部打印。 我尝试了几种情况，并查看了Microsoft提供的UWP Print应用程序的示例，但是它们使用RichTextBlock来显示内容溢出时的所有页面。但是我有一个列表，所以我不知道什么时候内容溢出。它仅显示打印预览用户界面中的第一页。
我也根据A4纸的尺寸计算了总页数。 下面是我的C＃代码：
if (PrintManager.IsSupported())
{
printDoc = new PrintDocument();
printDocSource = printDoc.DocumentSource;
_totalPages = (int)Math.Ceiling(wholeItemsListForPDF.Count / (double)15);
tempList = new ManifestPDFDataModel();
tempList = _manifestPDFDataModel;
printDoc.Paginate += PaginateManifestLabel;
for (int i = 1; i <= _totalPages; i++)
{
printDoc.GetPreviewPage += GetPreviewPageManifestLabel;
printDoc.AddPages += AddPagesManifestLabel;
if (i != _totalPages)
{
_manifestPDFDataModel.ItemsPDFList.RemoveRange(0, 15);
tempList.ItemsPDFList = _manifestPDFDataModel.ItemsPDFList;
}
}
printMan = PrintManager.GetForCurrentView();
printMan.PrintTaskRequested += PrintTaskRequestedManifestLabel;
//printHelper = new PrintHelper(this);
//printHelper.RegisterForPrinting();
//// Initialize print content for this scenario
//printHelper.PreparePrintContent(new GenericManifestPDF(_manifestPDFDataModel));
try
{
// Show print UI
await PrintManager.ShowPrintUIAsync();
}
catch (Exception ex)
{
// Printing cannot proceed at this time
ContentDialog noPrintingDialog = new ContentDialog()
{
Title = "Printing error",
Content = "\nSorry, printing can' t proceed at this time.",
PrimaryButtonText = "OK"
};
printMan.PrintTaskRequested -= PrintTaskRequestedManifestLabel;
printDoc.Paginate -= PaginateManifestLabel;
printDoc.GetPreviewPage -= GetPreviewPageManifestLabel;
printDoc.AddPages -= AddPagesManifestLabel;
await noPrintingDialog.ShowAsync();
}
}
else
{
// Printing is not supported on this device
ContentDialog noPrintingDialog = new ContentDialog()
{
Title = "Printing not supported",
Content = "\nSorry, printing is not supported on this device.",
PrimaryButtonText = "OK"
};
printMan.PrintTaskRequested -= PrintTaskRequestedManifestLabel;
printDoc.Paginate -= PaginateManifestLabel;
printDoc.GetPreviewPage -= GetPreviewPageManifestLabel;
printDoc.AddPages -= AddPagesManifestLabel;
await noPrintingDialog.ShowAsync();
}
所有与打印相关的事件：
public void PrintTaskRequestedManifestLabel(PrintManager sender, PrintTaskRequestedEventArgs args)
{
// Create the PrintTask.
// Defines the title and delegate for PrintTaskSourceRequested
var printTask = args.Request.CreatePrintTask("Print", PrintTaskSourceRequestedManifestLabel);
// Handle PrintTask.Completed to catch failed print jobs
printTask.Completed += PrintTaskCompletedManifestLabel;
}
/// <summary>
/// PrintTaskSourceRequestedManifestLabel
/// </summary>
/// <param name="args">PrintTaskSourceRequestedArgs</param>
public void PrintTaskSourceRequestedManifestLabel(PrintTaskSourceRequestedArgs args)
{
// Set the document source.
args.SetSource(printDocSource);
}
#region Print preview
/// <summary>
/// Pagination Manifest Label
/// </summary>
/// <param name="sender">pass sender object</param>
/// <param name="e">PaginateEventArgs</param>
public void PaginateManifestLabel(object sender, PaginateEventArgs e)
{
// As I only want to print one Rectangle, so I set the count to 1
printDoc.SetPreviewPageCount(_totalPages, PreviewPageCountType.Intermediate);
}
/// <summary>
/// Print Preview Page ManifestLabel SetPreviewPage
/// </summary>
/// <param name="sender">pass sender object</param>
/// <param name="e">GetPreviewPageEventArgs</param>
public void GetPreviewPageManifestLabel(object sender, GetPreviewPageEventArgs e)
{
// Provide a UIElement as the print preview.
printDoc.SetPreviewPage(e.PageNumber, new GenericManifestPDF(tempList));
}
#endregion
#region Add pages to send to the printer
/// <summary>
/// Add Pages ManifestLabel
/// </summary>
/// <param name="sender">pass sender object</param>
/// <param name="e">AddPagesEventArgs</param>
public void AddPagesManifestLabel(object sender, AddPagesEventArgs e)
{
printDoc.AddPage(new GenericManifestPDF(tempList));
// Indicate that all of the print pages have been provided
printDoc.AddPagesComplete();
}
#endregion
#region Print task completed
/// <summary>
/// Print Task Completed ManifestLabel
/// </summary>
/// <param name="sender">PrintTask</param>
/// <param name="args">PrintTaskCompletedEventArgs</param>
public async void PrintTaskCompletedManifestLabel(PrintTask sender, PrintTaskCompletedEventArgs args)
{
// Notify the user when the print operation fails.
if (args.Completion == PrintTaskCompletion.Failed)
{
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, async () =>
{
ContentDialog noPrintingDialog = new ContentDialog()
{
Title = "Printing error",
Content = "\nSorry, failed to print.",
PrimaryButtonText = "OK"
};
printMan.PrintTaskRequested -= PrintTaskRequestedManifestLabel;
printDoc.Paginate -= PaginateManifestLabel;
printDoc.GetPreviewPage -= GetPreviewPageManifestLabel;
printDoc.AddPages -= AddPagesManifestLabel;
await noPrintingDialog.ShowAsync();
});
}
else
{
printMan.PrintTaskRequested -= PrintTaskRequestedManifestLabel;
//printDoc.Paginate -= Paginate;
//printDoc.GetPreviewPage -= GetPreviewPage;
//printDoc.AddPages -= AddPages;
}
}
#endregion
XAML页面代码：
<Grid>
<Grid.RowDefinitions>
<RowDefinition Height="30*"/>
<RowDefinition Height="70*"/>
</Grid.RowDefinitions>
<Grid BorderBrush="Black" BorderThickness="2" Margin="30">
<Grid.RowDefinitions>
<RowDefinition Height="80*"/>
<RowDefinition Height="20*"/>
</Grid.RowDefinitions>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<Grid>
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<TextBlock Text="Manifest PDF Report" Foreground="Black" FontWeight="Bold" Margin="20,20,0,0"/>
<TextBlock x:Name="Function" Foreground="Black" Grid.Row="1" FontWeight="Bold" Margin="20,20,0,0"/>
<TextBlock x:Name="Counts" Grid.Row="2" Foreground="Black" FontWeight="Bold" Margin="20,20,0,0"/>
</Grid>
<Grid Grid.Column="1">
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<TextBlock x:Name="PrintedValue" Foreground="Black" FontWeight="Bold" Margin="20,20,0,0"/>
<TextBlock x:Name="RouteValue" Foreground="Black" Grid.Row="1" FontWeight="Bold" Margin="20,20,0,0"/>
<TextBlock x:Name="BatchIDValue" Grid.Row="2" Foreground="Black" FontWeight="Bold" Margin="20,20,0,0"/>
</Grid>
<Grid Grid.Column="2">
<Grid.RowDefinitions>
<RowDefinition/>
<RowDefinition/>
<RowDefinition/>
</Grid.RowDefinitions>
<Image x:Name="BarcodeImage" Margin="20,0,0,0" HorizontalAlignment="Center"/>
<TextBlock x:Name="BatchBarcodeText" Grid.Row="1" Foreground="Black" FontWeight="Bold" Margin="20,20,0,0"/>
</Grid>
</Grid>
<Grid Grid.Row="2">
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<TextBlock Text="Delivered By :" Foreground="Black" Margin="20,0,0,0" VerticalAlignment="Center"/>
<TextBlock Text="Batch Delivery Time :" Foreground="Black" Grid.Column="1" Margin="20,0,0,0" VerticalAlignment="Center"/>
</Grid>
</Grid>
<Grid Grid.Row="2">
<Grid.RowDefinitions>
<RowDefinition Height="10*"/>
<RowDefinition Height="90*"/>
</Grid.RowDefinitions>
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition/>
<ColumnDefinition/>
</Grid.ColumnDefinitions>
<TextBlock FontWeight="Bold" Text="BILL#" Foreground="Black" TextDecorations="Underline" Margin="20,20,0,0"/>
<TextBlock FontWeight="Bold" Grid.Column="1" Foreground="Black" TextDecorations="Underline" Text="Carrier" Margin="20,20,0,0"/>
<TextBlock FontWeight="Bold" Grid.Column="2" Foreground="Black" TextDecorations="Underline" Text="Package" Margin="20,20,0,0"/>
<TextBlock FontWeight="Bold" Grid.Column="3" Foreground="Black" TextDecorations="Underline" Text="Location" Margin="20,20,0,0"/>
<TextBlock FontWeight="Bold" Grid.Column="4" Text="ItemType" Foreground="Black" TextDecorations="Underline" Margin="20,20,0,0"/>
<TextBlock FontWeight="Bold" Grid.Column="5" Foreground="Black" TextDecorations="Underline" Text="Deliver To" Margin="20,20,0,0"/>
<TextBlock FontWeight="Bold" Grid.Column="6" Foreground="Black" TextDecorations="Underline" Text="Sender" Margin="20,20,0,0"/>
<TextBlock FontWeight="Bold" Grid.Column="7" Foreground="Black" TextDecorations="Underline" Text="Date" Margin="20,20,0,0"/>
<TextBlock FontWeight="Bold" Grid.Column="8" Foreground="Black" TextDecorations="Underline" Text="PO" Margin="20,20,0,0"/>
<TextBlock FontWeight="Bold" Grid.Column="9" Foreground="Black" TextDecorations="Underline" Text="Control" Margin="20,20,0,0"/>
</Grid>
<ListView Grid.Row="1" x:Name="PDFItemsList" IsItemClickEnabled="False">
<ListView.ItemContainerStyle>
<Style TargetType="ListViewItem">
<Setter Property="BorderThickness" Value="0,0,0,1" />
<Setter Property="BorderBrush" Value="Black"/>
</Style>
</ListView.ItemContainerStyle>
<ListView.ItemTemplate>
<DataTemplate>
<ContentControl Style="{StaticResource EmptyContentControlStyle}">
<Grid>
<Grid.ColumnDefinitions>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
<ColumnDefinition Width="Auto"/>
</Grid.ColumnDefinitions>
<TextBlock Text="{Binding Bill}" Grid.Column="0" Foreground="Black" Margin="20,20,0,0"/>
<TextBlock Text="{Binding CarrierName}" HorizontalAlignment="Right" Grid.Column="1" Foreground="Black" Grid.Row="1" Margin="20,20,0,0"/>
<TextBlock Text="{Binding PackageID}" HorizontalAlignment="Right" Foreground="Black" Grid.Column="2" Margin="20,20,0,0"/>
<TextBlock Text="{Binding Location}" HorizontalAlignment="Right" Foreground="Black" Grid.Column="3" Margin="20,20,0,0"/>
<TextBlock Text="{Binding ItemType}" HorizontalAlignment="Right" Foreground="Black" Grid.Column="4" Margin="20,20,0,0"/>
<TextBlock Text="{Binding DeliverTo}" HorizontalAlignment="Right" Foreground="Black" Grid.Column="5" Margin="20,20,0,0"/>
<TextBlock Text="{Binding Sender}" HorizontalAlignment="Right" Grid.Column="6" Foreground="Black" Margin="20,20,0,0"/>
<TextBlock Text="{Binding CreationDate}" HorizontalAlignment="Right" Foreground="Black" Grid.Column="7" Margin="20,20,0,0"/>
<TextBlock Text="{Binding PONumber}" Foreground="Black" HorizontalAlignment="Right" Grid.Column="8" Margin="20,20,0,0"/>
<TextBlock Text="{Binding ControlNumber}" HorizontalAlignment="Right" Foreground="Black" Grid.Column="9" Margin="20,20,0,0"/>
</Grid>
</ContentControl>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
</Grid>
</Grid>
谢谢。
答案 0 :(得分：0)
两天后，我终于可以做到了。 解决方法如下：
我们需要使用Linq使用'Skip'和'Take'方法，直到我们到达列表的总页数为止，并且我们需要继续更新列表。总页数取决于A4尺寸纸张中可容纳的项目数量。在我的情况下是11。所以我的“分页”事件如下所示：
protected FrameworkElement firstPage;
public void PaginateManifestLabel(object sender, PaginateEventArgs e)
{
// Clear the cache of preview pages
printPreviewPages.Clear();
// Clear the print canvas of preview pages
PrintCanvas.Children.Clear();
// This variable keeps track of the last RichTextBlockOverflow element that was added to a page which will be printed
ListView lastRTBOOnPage = null;
// Get the PrintTaskOptions
PrintTaskOptions printingOptions = ((PrintTaskOptions)e.PrintTaskOptions);
// Get the page description to deterimine how big the page is
PrintPageDescription pageDescription = printingOptions.GetPageDescription(0);
// We know there is at least one page to be printed. passing null as the first parameter to
// AddOnePrintPreviewPage tells the function to add the first page.
//lastRTBOOnPage = AddOnePrintPreviewPage(null, pageDescription);
// We know there are more pages to be added as long as the last RichTextBoxOverflow added to a print preview
// page has extra content
int i = 0;
while (i < _totalPages)
{
_manifestPDFDataModelforPriniPagination.ItemsPDFList = tempList.ItemsPDFList.Skip(i * 11).Take(11).ToList();
lastRTBOOnPage = AddOnePrintPreviewPage(lastRTBOOnPage, pageDescription);
i++;
}
PrintDocument printDoc = (PrintDocument)sender;
// Report the number of preview pages created
printDoc.SetPreviewPageCount(printPreviewPages.Count, PreviewPageCountType.Intermediate);
}
AddOnePrintPreviewPage：
private ListView AddOnePrintPreviewPage(ListView lastRTBOAdded, PrintPageDescription printPageDescription)
{
// XAML element that is used to represent to "printing page"
FrameworkElement page;
// The link container for text overflowing in this page
ListView textLink;
// Check if this is the first page ( no previous RichTextBlockOverflow)
if (lastRTBOAdded == null)
{
// If this is the first page add the specific scenario content
page = firstPage;
}
else
{
// Flow content (text) from previous pages
page = new GenericManifestPDF(_manifestPDFDataModelforPriniPagination);
}
// Set "paper" width
page.Width = printPageDescription.PageSize.Width;
page.Height = printPageDescription.PageSize.Height;
// Find the last text container and see if the content is overflowing
textLink = (ListView)page.FindName("PDFItemsList");
// Add the page to the page preview collection
printPreviewPages.Add(page);
return textLink;
}
GetPreviewPageManifestLabel：
public void GetPreviewPageManifestLabel(object sender, GetPreviewPageEventArgs e)
{
// Provide a UIElement as the print preview.
PrintDocument printDoc = (PrintDocument)sender;
printDoc.SetPreviewPage(e.PageNumber, printPreviewPages[e.PageNumber - 1]);
}
AddPagesManifestLabel：
public void AddPagesManifestLabel(object sender, AddPagesEventArgs e)
{
for (int i = 0; i < printPreviewPages.Count; i++)
{
// We should have all pages ready at this point...
printDoc.AddPage(printPreviewPages[i]);
}
PrintDocument printDocument = (PrintDocument)sender;
// Indicate that all of the print pages have been provided
printDocument.AddPagesComplete();
}
PrintTaskRequestedManifestLabel：
public void PrintTaskRequestedManifestLabel(PrintManager sender, PrintTaskRequestedEventArgs args)
{
// Create the PrintTask.
// Defines the title and delegate for PrintTaskSourceRequested
var printTask = args.Request.CreatePrintTask("Print", PrintTaskSourceRequestedManifestLabel);
printTask.Options.Orientation = PrintOrientation.Landscape;
// Handle PrintTask.Completed to catch failed print jobs
printTask.Completed += PrintTaskCompletedManifestLabel;
}
PrintTaskSourceRequestedManifestLabel：
public void PrintTaskSourceRequestedManifestLabel(PrintTaskSourceRequestedArgs args)
{
// Set the document source.
args.SetSource(printDocSource);
}
PrintTaskCompletedManifestLabel：
public async void PrintTaskCompletedManifestLabel(PrintTask sender, PrintTaskCompletedEventArgs args)
{
// Notify the user when the print operation fails.
if (args.Completion == PrintTaskCompletion.Failed)
{
await CoreApplication.MainView.CoreWindow.Dispatcher.RunAsync(CoreDispatcherPriority.Normal, async () =>
{
ContentDialog noPrintingDialog = new ContentDialog()
{
Title = "Printing error",
Content = "\nSorry, failed to print.",
PrimaryButtonText = "OK"
};
printMan.PrintTaskRequested -= PrintTaskRequestedManifestLabel;
printDoc.Paginate -= PaginateManifestLabel;
printDoc.GetPreviewPage -= GetPreviewPageManifestLabel;
printDoc.AddPages -= AddPagesManifestLabel;
await noPrintingDialog.ShowAsync();
});
}
else
{
printMan.PrintTaskRequested -= PrintTaskRequestedManifestLabel;
}
}
PreparePrintContent：
public void PreparePrintContent(GenericManifestPDF page)
{
firstPage = null;
if (firstPage == null)
{
firstPage = page;
}
}
最后，您需要这样调用这些事件：
if (PrintManager.IsSupported())
{
printDoc = new PrintDocument();
printDocSource = printDoc.DocumentSource;
_totalPages = (int)Math.Ceiling(wholeItemsListForPDF.Count / (double)11);
tempList = new ManifestPDFDataModel();
tempList = _manifestPDFDataModel;
printDoc.Paginate += PaginateManifestLabel;
printDoc.GetPreviewPage += GetPreviewPageManifestLabel;
printDoc.AddPages += AddPagesManifestLabel;
printMan = PrintManager.GetForCurrentView();
printMan.PrintTaskRequested += PrintTaskRequestedManifestLabel;
PreparePrintContent(new GenericManifestPDF(_manifestPDFDataModel));
try
{
// Show print UI
await PrintManager.ShowPrintUIAsync();
}
catch (Exception ex)
{
// Printing cannot proceed at this time
ContentDialog noPrintingDialog = new ContentDialog()
{
Title = "Printing error",
Content = "\nSorry, printing can' t proceed at this time.",
PrimaryButtonText = "OK"
};
printMan.PrintTaskRequested -= PrintTaskRequestedManifestLabel;
printDoc.Paginate -= PaginateManifestLabel;
printDoc.GetPreviewPage -= GetPreviewPageManifestLabel;
printDoc.AddPages -= AddPagesManifestLabel;
await noPrintingDialog.ShowAsync();
}
}
else
{
//Printing is not supported on this device
ContentDialog noPrintingDialog = new ContentDialog()
{
Title = "Printing not supported",
Content = "\nSorry, printing is not supported on this device.",
PrimaryButtonText = "OK"
};
printMan.PrintTaskRequested -= PrintTaskRequestedManifestLabel;
printDoc.Paginate -= PaginateManifestLabel;
printDoc.GetPreviewPage -= GetPreviewPageManifestLabel;
printDoc.AddPages -= AddPagesManifestLabel;
await noPrintingDialog.ShowAsync();
}