I am working on a UWP application and need to implement the print functionality. I followed this and docs for the same. These links helped me to setup all the print functionalities where I am able to generate a print preview page for the content to the printed.
The preview page, however, shows the image to be printed within a small block only. I am basically not able to set the height and width (or any similar property) so that it fits to the page. I have attached screenshot and code snippets.
I have been stuck with this for quite a while. Any help will be appreciated. Thank you.
XAML code for print panel and UI element to be printed:
<Grid>
<Image x:Name="myImage"
Height="594"
Width="432"
Margin="50,0,0,0"></Image>
<Border x:Name="inkContainer"
Grid.Column="2"
Grid.Row="1"
BorderBrush="Black"
BorderThickness="1"
HorizontalAlignment="Center"
VerticalAlignment="Center"
Margin="50,0,0,0"
Height="594"
Width="432">
<InkCanvas x:Name="inkCanvas"
Height="594"
Width="432" />
</Border>
</Grid>
<RelativePanel x:Name="PrintView"
BorderThickness="1"
Visibility="Collapsed"
Background="#eaedf1"
BorderBrush="Black"
CornerRadius="2">
<Image x:Name="PrintImage"
Height="594"
Width="432"
Margin="50,20,0,0"></Image>
<Button Name="btnPrint"
Content="Print"
Background="#1bcfb4"
Foreground="white"
CornerRadius="2"
IsEnabled="True"
Width="100"
Margin="160, 630, 0, 0"
Click="PrintButtonClick"/>
<Button Name="btnClosePrintPreview"
Content="Close"
Background="#5c5151"
Foreground="white"
CornerRadius="2"
IsEnabled="True"
Width="100"
Margin="270, 630, 0, 0"
Click="btnClosePrintPreview_Click"/>
</RelativePanel>
Code behind:
protected override void OnNavigatedTo(NavigationEventArgs e)
{
// Register for PrintTaskRequested event
printMan = PrintManager.GetForCurrentView();
printMan.PrintTaskRequested += PrintTaskRequested;
// Build a PrintDocument and register for callbacks
printDoc = new PrintDocument();
printDocSource = printDoc.DocumentSource;
printDoc.Paginate += Paginate;
printDoc.GetPreviewPage += GetPreviewPage;
printDoc.AddPages += AddPages;
}
private async void PrintButtonClick(object sender, RoutedEventArgs e)
{
if (PrintManager.IsSupported())
{
try
{
// Show print UI
await PrintManager.ShowPrintUIAsync();
}
catch
{
// Printing cannot proceed at this time
ContentDialog noPrintingDialog = new ContentDialog()
{
Title = "Printing error",
Content = "\nSorry, printing can' t proceed at this time.",
PrimaryButtonText = "OK"
};
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"
};
await noPrintingDialog.ShowAsync();
}
}
private void PrintTaskRequested(PrintManager sender, PrintTaskRequestedEventArgs args)
{
// Create the PrintTask.
// Defines the title and delegate for PrintTaskSourceRequested
var printTask = args.Request.CreatePrintTask("Print", PrintTaskSourceRequrested);
// Handle PrintTask.Completed to catch failed print jobs
printTask.Completed += PrintTaskCompleted;
}
private void btnClosePrintPreview_Click(object sender, RoutedEventArgs e)
{
PrintView.Visibility = Visibility.Collapsed;
}
private void PrintTaskSourceRequrested(PrintTaskSourceRequestedArgs args)
{
// Set the document source.
args.SetSource(printDocSource);
}
private void Paginate(object sender, PaginateEventArgs e)
{
// As I only want to print one Rectangle, so I set the count to 1
printDoc.SetPreviewPageCount(1, PreviewPageCountType.Final);
}
private void GetPreviewPage(object sender, GetPreviewPageEventArgs e)
{
// Provide a UIElement as the print preview.
printDoc.SetPreviewPage(e.PageNumber, this.PrintImage);
}
private void AddPages(object sender, AddPagesEventArgs e)
{
printDoc.AddPage(this.PrintImage);
// Indicate that all of the print pages have been provided
printDoc.AddPagesComplete();
}
private async void PrintTaskCompleted(PrintTask sender, PrintTaskCompletedEventArgs args)
{
// Notify the user when the print operation fails.
if (args.Completion == PrintTaskCompletion.Failed)
{
await Dispatcher.RunAsync(CoreDispatcherPriority.Normal, async () =>
{
ContentDialog noPrintingDialog = new ContentDialog()
{
Title = "Printing error",
Content = "\nSorry, failed to print.",
PrimaryButtonText = "OK"
};
await noPrintingDialog.ShowAsync();
});
}
if (args.Completion == PrintTaskCompletion.Submitted)
{
this.PrintView.Visibility = Visibility.Collapsed;
}
}
