Share PDF Files in Your Mobile and Desktop Apps.

Updated over 6 months ago

Environment

Version	Product	Author
11.0.0	Telerik UI for .NET MAUI PDF Viewer	Dobrinka Yordanova

Description

Learn how to share PDF files in your .NET MAUI application.

This knowledge base article also answers the following questions:

• How can I transfer PDF files in .NET MAUI application?
• How can I use the PDF Viewer Toolbar for Sharing PDF documents?

Solution

For sharing files, use the .NET MAUI Share File API. The Share command will be executed from a custom toolbar ButtonToolbarItem inside the PDF Viewer Toolbar.

1. Define the PDF VIewer and PDF Viewer Toolbar:

XAML

<Grid>
	<Grid.RowDefinitions>
		<RowDefinition Height="Auto"/>
		<RowDefinition />
	</Grid.RowDefinitions>
	<telerik:RadPdfViewerToolbar PdfViewer="{Binding Source={x:Reference pdfViewer}}">

		<telerik:ButtonToolbarItem Text="Share" 
                                   Command="{Binding ShareDocumentCommand}" />
	</telerik:RadPdfViewerToolbar>
	<telerik:RadPdfViewer x:Name="pdfViewer" 
						  Grid.Row="1"
                          Document="{Binding Document, Mode=OneWayToSource}" />
</Grid>

2. In this example, load the document as Embedded Resource.

C#

Func<CancellationToken, Task<Stream>> streamFunc = ct => Task.Run(() =>
{
	Assembly assembly = typeof(MainPage).Assembly;
	string fileName = assembly.GetManifestResourceNames().FirstOrDefault(n => n.Contains("pdf-overview.pdf"));
	Stream stream = assembly.GetManifestResourceStream(fileName);
	return stream;
});
this.pdfViewer.Source = streamFunc;

3. Create a ViewModel and implement the ShareDocumentCommand which defines the Share API:

C#

public class ViewModel
{
	public ViewModel()
	{
		this.ShareDocumentCommand = new Command(this.ShareDocument);
	}

	private async void ShareDocument(object obj)
	{
		await ShareAsync();
	}

	// share pdf document
	private async Task ShareAsync()
	{
		Assembly assembly = typeof(MainPage).Assembly;
		string fileName = assembly.GetManifestResourceNames().FirstOrDefault(n => n.Contains("pdf-overview.pdf"));
		Stream stream = assembly.GetManifestResourceStream(fileName);
		var cacheFile = Path.Combine(FileSystem.CacheDirectory, "pdf-overview.pdf");
		using (var file = new FileStream(cacheFile, FileMode.Create, FileAccess.Write))
		{
			stream.CopyTo(file);
		}
		var request = new ShareFileRequest
		{
			Title = "Share pdf document",
			File = new ShareFile(cacheFile)
		};
		await Share.Default.RequestAsync(request);
	}

	public RadFixedDocument Document { get; set; }

	public ICommand ShareDocumentCommand { get; set; }
}

See Also

• PDF Viewer Toolbar
• Share Files in .NET MAUI